NEIGC 2017 Information Page

 

NEIGC 2017 FORMAL ANNOUNCEMENT AND REGISTRATION

>>> REGISTRATION DEADLINE SUNDAY SEPTEMBER 24TH <<<

Mark your calendars for the 2017 New England Intercollegiate Geological Conference or NEIGC! This year the dates are Friday Sept. 29 to Sun Oct. 1, 2017 and the location is in Bethel, Maine. The “footprint” of the field trips will be the foothills and mountains of western Maine and the adjacent White Mountains of New Hampshire. Think of an area including Bethel, Farmington, Rumford, and Rangeley, Maine, and Gorham, Lancaster, and Berlin, New Hampshire. Your host this year is Department of Geology, Bates College with special help from the Maine Mineral and Gem Museum and Gould Academy.

HIGHLIGHTS:

  • Each day of the conference there will be 6 spectacular fieldtrips covering different aspects of bedrock and/or surficial geology. A total of 18 trips will be offered this year! Field trips will begin at different times and at different places on Friday, Saturday and Sunday.  Please consult each field trip description (below) for this information.
  • Friday night from 5-7 pm (hors d’oeuvres and cash bar) there will be an open house at the Maine Mineral and Gem Museum. See world class Maine minerals and discover the otherworldly Stifler Collection of Meteorites. Led by the MMGM staff.
  • Saturday night is the banquet at Gould Academy’s Ordway Hall featuring fine food at a reasonable cost and in a wonderful venue. The social hour goes from 5-6 pm (hors d’oeuvres and cash bar) and the buffet dinner starts at 6 pm.

 

ON-LINE REGISTRATION……..NEW THIS YEAR FOR NEIGC!

Yes, NEIGC has upgraded to the digital world! To register, select your trips, and pay for the meeting, guidebook, and banquet, please click on this link:

http://community.bates.edu/NEIGC2017

REGISTRATION DEADLINE SUNDAY SEPTEMBER 24TH

 

Visit the NEIGC web site for up to date information about the conference.

http://w3.salemstate.edu/~lhanson/NEIGC/Conference.html

 

GUIDEBOOKS. This year the guidebook will be in color, a slightly more expensive option, but a much better product. In addition, the entire guidebook as well as individual field guides for each of the trips will be available on-line for free download by early September (Link TBA!).

ACCOMODATIONS: Reserve early as it will be peak leaf-peeping season! For camping try Bethel Outdoor Adventure and Campground, otherwise the Bethel region Chamber of Commerce web site has many other roofed options.

STUDENTS: NEIGC 2017 costs for students have been kept as low as possible to encourage their attendance (Student with/without Guidebook $35/$15; Student banquet $15).

 

FORMAL TRIP DESCRIPTIONS BY DAY:

FRIDAY TRIPS

A1: LITHIUM-BORON-BERYLLIUM GEM PEGMATITES, OXFORD CO., MAINE: HAVEY AND MOUNT MICA PEGMATITES.

LEADERS: William Simmons, Karen Webber, Alexander Falster, Myles Felch, Dwight Bradley. Contact information: alexander.falster@gmail.com (504) 220-5260

DESCRIPTION: This fieldtrip will visit two world renowned gem-producing pegmatites, in the Oxford County pegmatite field of western Maine: Havey and Mount Mica pegmatites. This is intended to be primarily an instructional fieldtrip lead by pegmatite experts from the MMGM MP2 research group. This is an opportunity to learn about the latest research and advances in the field of pegmatology in Maine.

TIME, PLACE, LOGISTICS: Friday September 29th at 8:30 am meet in the back parking lot of the Maine Mineral and Gem Museum located at 99 Main Street in Bethel, Maine (357595.99 m E, 4918691.40 m N). The field trip will begin with a brief discussion in the parking lot. We encourage carpooling to limit the number of vehicles entering the mines. A convoy of vehicles will travel approximately one hour to the Havey Quarry located off of Levine Road in Poland (395997.39 m E, 4880613.82 m N). Plan to spend approximately 2hrs at this location, starting with a discussion and later an opportunity to collect. Departing the Havey Quarry, the convoy will travel north approximately 40 minutes to the Mt. Mica Quarry located off of Mt. Mica road in Paris (382422.66 m E, 4902813.15 m N). Plan to spend approximately 2 hrs. at this site, which will begin with a discussion and end with an opportunity to collect on the dumps afterwards. There will not be an opportunity to go underground. At 4:00 pm, participants will leave the mine and travel north approximately 40 minutes back to Bethel. We encourage all participants to attend the Friday night reception at the Maine Mineral and Gem Museum. For this field trip, be prepared with a lunch as we will not be stopping along the way. There will be bathroom facilities available at each of the mine sites. Enrollment will be limited to 25 participants. Expect cold and unpredictable weather and dress accordingly. Please note: both quarries we are visiting are not open to the public except via previous arrangement.

 

A2: SMALLS FALLS REVISITED: A JOURNEY THROUGH A PALEOZOIC SEDIMENTARY BASIN

LEADERS: Mark Van Baalen, EPS Dept., Harvard University, Cambridge, MA 02138, email: mvb@harvard.edu; Douglas N. Reusch, UMF Division of Natural Sciences, Farmington, ME 04938, email: reusch@maine.edu; John F. Slack, U.S. Geological Survey (Emeritus), Farmington, ME 04938, email: jfslack7@gmail.com

DESCRIPTION: The Smalls Falls Formation, a critical unit within the extensive and problematic Central Maine Basin, records a spectacular abrupt change from oxygenated to oxygen-poor conditions. It is the youngest of the inboard-derived formations with a northwestern provenance, confirmed by recent geochemical and detrital zircon studies. The northwestern source area, following a post-Taconic subduction flip, had become the site of a southeast-facing Salinic continental arc system that collided with the Gander margin in the Silurian just before the bottom waters became oxygen-poor. The termination of oxygen-poor conditions coincides with the onset of Acadian foreland deposition in the conformably overlying Madrid Formation. On this trip, we will visit key sites, including several type localities, to examine protolith, metamorphic, metallogenic, deformational, and contact relationships of the Smalls Falls and enclosing formations that bear on the middle Paleozoic tectonic evolution of the Appalachian orogen. New thinking about Silurian tectonics and the geochemistry of metamorphosed black shales will be presented. All of the stops on this trip are covered by USGS map I-1692, Geological Map of Western Interior Maine (Moench & Pankiwskyj, 1988).

TIME, PLACE, LOGISTICS: Meet on Friday, September 29, 8:30 AM in Coburn Park, a public park along the Kennebec River in Skowhegan. 44°46.3 N, 69°42.6 W. The park is about 0.5 miles east of the center of town along US 2 (Water St.); it has a gazebo and a Porta Potty. Muffin alert: there is a fine bakery on Water St. called The Bankery! Dunkin Donuts also stands nearby on Water St. Skowhegan is about 75 miles east of Bethel; figure on 90 minutes of driving if departing from Bethel. Car pool if possible. Be prepared with normal outdoor clothing, including rain gear. The longest hike planned is a half mile. Bring your lunch, water and your camera, as there are some incredibly scenic stops. The trip will end near Bethel in late afternoon on Friday. Note that we will not return to our starting point, so plan accordingly.

 

A3: HYDROGEOLOGY OF THE FORMER CHLOR-ALKALI FACILITY SUPERFUND SITE AND DOWNSTREAM BED SEDIMENT MERCURY CONTAMINATION IN THE ANDROSCOGGIN RIVER, BERLIN NEW HAMPSHIRE

LEADERS and COAUTHORS: James Degnan, USGS, New England Water Science Center, Pembroke, New Hampshire, email: jrdegnan@usgs.gov, cell: (603) 568-8917, Darryl Luce, USEPA Region 1, Boston, Massachusetts, email: luce.darryl@epa.gov, voice: (617) 918-1336, Andrew Hoffman, NHDES, Hazardous Waste Remediation Bureau, Concord, New Hampshire, email: Andrew.Hoffman@des.nh.gov, voice: (603) 271-6778 and Ann Chalmers, USGS, New England Water Science Center, Montpellier, Vermont, email: chalmers@usgs.gov, voice: (802) 828-4479

DESCRIPTION: Field trip stops will illustrate the hydrologic and geologic setting in the vicinity of Berlin, NH and how it affects a Superfund site. The trip will include a visit to the former Chlor-Alkali Facility Superfund Site, bedrock outcrops, and river reaches. The site industrial history, current environmental and regulatory issues, as well as how the geology and groundwater hydrology bear on the site cleanup will be discussed. Nearby outcrops of the Ordovician Oliverian Plutonic Suite and Ordovician Ammonoosuc Volcanics, representative of the site and regional geology, will be visited. Stops at several river reaches, with varying settings, will include descriptions of hydraulics, surface water and sediment chemistry.

TIME, PLACE, LOGISTICS: Friday September 29th, 10:00 AM in the parking lot on the south side of Mason St. on an unnamed island adjacent to the Smith Dam and Hydrostation water intake canal in the Androscoggin River (326596.00 m E, 4926285.00 m N). The Smith Dam is about 30 miles (40 minutes) west of Bethel, ME. From Bethel follow Rte. U.S. 2 west to Gorham, NH then take Rte. NH 16 north to Berlin. In Berlin, turn right onto Unity St. (truck Rte. 16 N) at the James Cleveland Bridge, then left onto Mason St. The parking lot will be on your left after crossing the first bridge over the Androscoggin River on Mason St.. Be prepared with field clothing, snacks, water and good footwear for rocky, uneven terrain. Total walking distance will be one to two miles with minor elevation loss and gain (max +/- 100 feet). It will be most convenient to bring your lunch, but our lunch stop will be near town so if you need to get something, you can go on your own and rejoin the group. Carpooling is encouraged.

 

A4: POSSIBLE POST-LAURENTIDE CIRQUE GLACIATION IN THE GREAT GULF,

PRESIDENTIAL RANGE, NEW HAMPSHIRE

LEADERS: Brian Fowler, NH Geologic Resources Advisory Committee, P.O. Box 1829, Conway, NH 03818, Email: b2fmr@metrocast.net AND Ian Dulin, Dept. of Geology, Bates, College, Lewiston, ME 04240, Email: idulin22@gmail.com.

DESCRIPTION: This trip explores recent contributions to a continuing question. Did active alpine glaciation occur in the glacial cirques on the Presidential Range after the departure of the last Laurentide Ice Sheet (LIS)? This trip examines the possibility that it did in one of these cirques. During the past 145 years, the absence of identified moraines within and near the cirques suggested only activity that pre-dated the arrival of the LIS. At the same time, however, the freshness of their morphology suggested activity that post-dated its departure. New surficial mapping, laboratory petrographic study, and recently documented post-LIS regional climate indications have combined to permit tentative identification of landforms in and below the Great Gulf that may be moraines. If confirmed by further study, these features will be evidence that active alpine glaciation occurred in at least some of the region’s cirques after the departure of the LIS. This trip consists of an easy to occasionally moderate ~ 4.5 -mile roundtrip hike to the Great Angel Station Lookout on the Great Glen Trails System to examine surficial features traversed by the hike and visible from the Lookout (weather-permitting) that may represent terminal and recessional moraines.

TIME, PLACE, LOGISTICS:   Friday, September 29th, 1:00 PM SHARP from the North Parking Lot at the Mt. Washington Auto Road Base Lodge (east side of NH 16, 8 miles south of Gorham, NH / 322363 m E, 4906302 m N). Trip will return to the parking lot by ~ 4:00 PM. Sturdy footwear and a backpack with water, snack items, and clothing appropriate for the day and potential seasonal weather are required.

 

A5: GRAFTON NOTCH STATE PARK: GLACIAL GORGES AND STREAMS UNDER PRESSURE IN THE MAHOOSIC RANGE, ME

LEADERS: Alice M. Doughty, Dept. of Geology, Bates College, Lewiston, ME 04240; Woodrow B. Thompson, Maine Geological Survey (retired), Augusta, ME 04333. Email address: alice.doughty@gmail.com cell: (207) 318-8220

DESCRIPTION: We will drive as a caravan in our own vehicles (please carpool because parking is limited) along the scenic Route 26 into Grafton Notch State Park, northwest of Bethel, Maine. The field stops are at five designated park landmarks and one sand pit just north of the park. There is an optional strenuous hike with a 1000 ft elevation gain to Table Rock over a 1.9-mile distance. This hike is best for experienced and adventurous hikers who enjoy lots of rock steps, bolted rebar steps, boulder scrabbles, and stunning views (not available in bad weather). The focus of this field trip will be the glacial geology of the park (U-shaped valley, gorges, and an esker) but the exposed bedrock offers glimpses of Devonian granite with pegmatite intrusions.

TIME, PLACE, LOGISTICS: We will meet Friday September 29th, 9:00 AM in the Androscoggin Rest Area opposite Sunday River Brewing Company on U. S. Route 2 (UTM 356200 m E, 4923600 m N). The Rest Area is about 3 mi north of Bethel town center and we can carpool from here. Warning: Grafton Notch is primarily a boreal forest, so expect a colder climate than Bethel; and if it is raining, rocks may be very slippery near the gorges. Be prepared with proper clothing, including warm and waterproof layers and good hiking boots. Large mammals are very common in this park, so please take caution as you are driving these roads. Bring your lunch, water, snacks, bug spray, sunscreen, and cameras because there will not be any shops in the park. There are toilet facilities available at some but not all stops. There is a $3 fee per vehicle for the park; please pay this at the first stop (Screw Auger Falls).

 

A6: STRATIGRAPHIC AND STRUCTURAL TRAVERSE OF MOUNT MORIAH AND THE WILD RIVER WILDERNESS AREA

LEADER: Tim Allen, Department of Environmental Studies, Keene State College, Keene, NH 03435-2001, e-mail: tallen@keene.edu, cell: 603-209-9222

DESCRIPTION: This trip will be an extended hike from the Androscoggin River over Mount Moriah to the Wild River, crossing the center of a large area of migmatized metasedimentary rocks of the Central Maine Terrane. The geologic problems to be examined include the stratigraphic assignments of these highly metamorphosed rocks; the structural interpretation within the migmatite zone, which necessarily depends on the stratigraphy; and speculation as to the causes and mechanisms for producing large localized migmatite zones and metamorphic “hot spots” (see also Trip C6). A version of this trip was previously run in 1996.

Maps (USGS 7.5 minute 1:24,000 quadrangles): Shelburne, NH-ME; Wild River, NH-ME; Carter Dome, NH. The AMC Carter-Moriah Range Trail Map and the AMC White Mountain Trail Guide are also useful. The best map for the Pinkham Notch area is Washburn’s “Mount Washington and the Heart of the Presidential Range” (1988, 1:20,000).

Limited to 9 participants since we will spend much of the day within a federally designated Wilderness Area.

TIME, PLACE, LOGISTICS: Friday, September 30, 7:00 AM at the Wild River Campground (335380.00E 4907945.00N) at the end of the Wild River Road off of the Evans Notch Road (ME/NH 113) south off of US 2 from Gilead, Maine. We will consolidate into as few vehicles as possible–leaving as many as possible at Wild River (WMNF Recreation Passes required for all vehicles) — and drive to the Rattle River Trailhead (Appalachian Trail) on US 2 three miles east of Gorham (332020.00E 4918560.00N). The entire trip will be on foot, over the Rattle River, Moriah Brook, and connecting trails (approximately 13 miles, with 3300 feet of vertical relief, “book time” of almost 9 hours). Be prepared to spend a full day hiking in the mountains–wear appropriate boots and clothing, and bring plenty of food, water, and extra clothing. At the end of the hike, we will consolidate into the vehicles we left at Wild River and return to the Rattle River trailhead to retrieve the vehicles left there.

 

SATURDAY TRIPS

B1: BEDROCK GEOLOGY OF THE BALD MOUNTAIN-SADDLEBACK WIND RANGE, ME

LEADER: Doug Reusch, Dept. of Earth and Environmental Sciences, University of Maine at Farmington, Farmington, Maine 04938. email: reusch@maine.edu office: (207) 778-7463

DESCRIPTION: In west-central Maine, Bald Mountain and adjacent Saddleback Wind host some of the most extensive bedrock exposures within the contentious Rumford outlier of “Seboomook Group” (e.g., Bradley and O’Sullivan, 2016). This trip will consist of a long, all-day traverse from the Bald Mountain trailhead on Route 156 to the Saddleback Ridge wind farm in Carthage, via the recently opened trail. The outcrops are comparable to ones in the Presidential Range, Mount Kearsarge, and Mount Monadnock along strike in the New Hampshire segment of the Central Maine Basin. Several marker beds are repeated on early cryptic thrusts, and sedimentary features well preserved at a high grade of metamorphism along with variably deformed leucogranites. Graphitic schists and calc-silicate rocks serve to illustrate, respectively, important CO2 sinks and sources in the carbon cycle. If time permits, we will also examine some of the excellent new exposures on the wind farm access road.

TIME, PLACE, LOGISTICS: Saturday September 30th, 8:00 AM in the gravel parking area behind the Saddleback Ridge Wind office building (390373.00 m E, 4938625.00 m N). Driving east on Route 2, around 50 minutes from Bethel and near the crest of a long hill, turn left on Winter Hill Road (easily missed, look for signs “Winter Hill Antiques” and “Rocky Mountain Terrain Park”). Proceed 0.9 miles west to the office site. Bathroom facilities will be available. Following introductory remarks, two UMF vans will deliver 20 participants to the Bald Mountain trailhead on Route 156 (http://www.mainetrailfinder.com/trails/trail/bald-mountain-and-saddleback-wind-trail 393477 m E, 4945902 m N), a 20-minute drive. (Vans will return to the starting point, continue to the end of the wind farm access road, and drivers then hike northeast to re-join the group.) Note that while the UMF vans can accommodate 20, others are welcome to participate should they be willing to make similar travel arrangements (preferably in advance). Bring lunch, lots of water, and appropriate clothing for a long, all-day hike with significant portions exposed to the elements. Trail conditions vary considerably. The initial steep ascent has suffered from erosion. The top half of Bald is ledge that under some conditions can be dangerously slippery. If weather is atrocious, the contingency plan is to repeat our 2010 NEIGC trip.

 

B2: GLACIAL DEPOSITS AND ALLUVIAL FANS IN THE NORTHWESTERN WHITE MOUNTAINS, NEW HAMPSHIRE

LEADERS: Woodrow B. Thompson, Maine Geological Survey (retired), 93 State House Station, Augusta, ME 04333; and Greg Barker, New Hampshire Geological Survey, PO Box 95, Concord, NH 03302-0095. E-mail: iceagemaine@myfairpoint.net. Phone: (207) 685-3647 cell: (207) 512-0681

DESCRIPTION: You will see a wide variety of glacial features on this trip as we travel through the Randolph-Bethlehem-Lancaster area. The stops will include large moraines formed ~ 14,000 years ago during Older Dryas glacial readvance, and a spectacular pit exposure of the readvance stratigraphy. We will also examine glacial lake deltas and associated features resulting from deglaciation, and a large postglacial alluvial fan adjacent to the northern peaks. The LiDAR expression of glacial and postglacial deposits will be an important part of this trip.  Surficial quadrangle mapping for the New Hampshire Geological Survey, and newly available LiDAR imagery, reveal additional moraines that help define and fill gaps in the White Mountain Moraine System.  These include a large area of unusual hummocky moraines in Jefferson.

TIME, PLACE, LOGISTICS: Saturday, September 30, 8:00 AM. Assemble at 8:00 am at the Randolph Fire Station, 0.5 mile from U. S. Route 2 via the Pinkham B Road (aka Dolly Copp Rd.) (319571 m E; 4915340 m N). The turnoff onto this road is about 28 miles / 40 minutes west of Bethel, ME; and from Gorham, NH, it is 4.5 miles / 7 minutes west of where you turn at the traffic light on the west end of downtown. The trip will start promptly at 8:30 am. Carpooling at the fire station is recommended, and moderate to high clearance vehicles are best for the woods road to Stop 1. Come prepared with your lunch, water, and clothing suitable for predicted weather. We’ll be walking through the woods at Stops 1 and 2 (short to moderate hikes including rocky ground and uneven terrain); all other stops will accessed by car. Bring a hard hat and safety vest, if possible, to wear at a large active gravel pit that we’ll be visiting. The trip will end in late afternoon at a point east of Lancaster, from which participants can drive back to Route 2 in Jefferson and east to NEIGC headquarters in Bethel. Topographic map coverage of the field trip area is provided by the Bethlehem, Jefferson, Mount Dartmouth, and Mount Washington 7.5-minute quadrangles, and the Mount Washington 1:100,000 map.  The latter map gives an excellent overview of the White Mountain region.

 

B3: PALEO-DUNES AND OTHER POST-GLACIAL ODDITIES IN THE WOODS AND FIELDS OF NEW SHARON AND CHESTERVILLE, ME

LEADERS: Patricia M. Millette, Mt. Blue High School, Farmington, ME 04938 patti.millette@maine.edu; Benjamin Andrews, Mt. Blue High School, Farmington, ME 04938; Anna Glass, Dept. of Geology, Bates College, Lewiston, Maine 04240; Thaddeus Gunther, Dept. of Geology, Bates College, Lewiston, Maine 04240; Roshan Luick, College of the Atlantic, Bar Harbor, ME 04609

DESCRIPTION: This field trip is a relatively easy hill-walk/drive through select areas in the towns of New Sharon and Chesterville Maine. Although many field researchers would not consider the towns of New Sharon and Chesterville to be the most prestigious or awe-inspiring geologic research locations, the participation of high school students and other locals has allowed the hidden glacial and post-glacial treasures of these two towns to come to light (and there is at least one spectacular view along the way). The simple question, “Can you tell me what this strange mound of sand out in my back pasture is,” and the astute observations of a high school student behind his house, launched an ongoing quest and a multiyear collaboration between the University of Maine and Mt. Blue High School earth science students to discover the story behind a collection of glacial and post-glacial deposits in this area. Although the trip principally highlights various post-glacial aeolian features, it also includes a classic crag-and-tail deposit, and glacial-marine deposits. If time permits, a short foray into the local uses for Cape Cod Hill Devonian granite and a look into the Farmington Falls Water Company are included as well.

TIME, PLACE, LOGISTICS: Saturday September 30, 8:30 am., (419669.92m E 4943034.02m N) at the New Sharon Town Office, (formerly the New Sharon Elementary School), located on the corner of US Rte2 and Cape Cod Hill Rd. Casual walking shoes/sneakers will probably be adequate for this trip, but since trip participants will be walking in woods and fields, long pants as tick deterrent would be advisable. Bring a lunch, snacks, and water bottle. Water bottle refills will be likely, but bathroom stops will be spotty, although several landowners have agreed to allow participants to use the facilities if necessary. Also, there is a general store, Douin’s Market, at the intersection of Rte’s 27 and 2 in New Sharon, (420624.80m E 4943142.95m N) with good sandwiches and other lunch supplies, within a mile of the trip starting point. Since the trip will end back on Cape Cod Hill at Stop 1, it will be possible to consolidate vehicles and leave some at that location, since several of the stops are along narrow roads.

 

B4: BEDROCK GEOLOGY OF MT. WASHINGTON, PRESIDENTIAL RANGE, NH

LEADER: J. Dykstra Eusden, Dept. of Geology, Bates College, Lewiston, Maine 04240 email: deusden@bates.edu cell: (207) 240-9150

DESCRIPTION: Great rocks await you in the alpine zone of Mt. Washington. We’ll drive as a caravan in our own vehicles to the top of Mt. Washington, then work our way down the mountain during the day. The field stops are a mix of road outcrops and several strenuous hikes with considerable elevation loss and gain (+/- 500 feet elevation) of approximately 1 to 2 miles in length. We’ll visit mostly outcrops of the Devonian Littleton Formation and some of the Silurian Madrid, Smalls Falls and Rangeley Formations. You’ll see graded bedding, multiple generations of deformation fabrics and coarse pseudomorphs of andalusite, all a product of the Acadian and Neoacadian orogenies.

TIME, PLACE, LOGISTICS: Saturday September 30th, 7:30 AM in the gravel parking area on the west side of NH 16 to the immediate south of the Auto Road entrance (322363.00 m E, 4906302.00 m N). The base of the Auto Road is about 30 miles west of Bethel, ME and takes about 40 minutes to drive. From Bethel follow Rte. U.S. 2 west to Gorham, NH then take Rte. NH 16 south to the Auto Road entrance. Due to the fragile nature of the alpine ecosystem, please always walk on trails or rocks. Warning: Expect extremely cold and unpredictable weather. Be prepared with proper clothing and good hiking boots for very rocky, uneven terrain, winter–like conditions and extremely high winds. Bring your lunch and water as there will be absolutely no chance to pick up anything once the trip begins. There are no bathrooms facilities. Vehicles must be consolidated. The folks at the Mt. Washington Auto Road have kindly agreed to charge us only $29 per vehicle and waive the passenger fee. Half-ton vans are permitted up the road but with a maximum passenger and luggage weight of 900 lbs (that’s approximately 6 people, including driver). If you are planning on driving your vehicle, please carefully check the vehicle restrictions on the Auto Road web site that can be found here.

 

B5: GEOLOGY OF THE LOWER ELLIS RIVER VALLEY AND RUMFORD WHITECAP MOUNTAIN, ANDOVER AND RUMFORD, MAINE

LEADERS: Lindsay Spigel, Amber Whittaker, and Ryan Gordon, Maine Geological Survey, Augusta, Maine 04333. Emails: lindsay.spigel@maine.gov; amber.h.whittaker@maine.gov; ryan.gordon@maine.gov Phone: (207) 287-7177; (207) 287-2803; (207) 287-7178

DESCRIPTION: This trip will provide an overview of the intriguing East Andover USGS 7.5 minute quadrangle, with something for a variety of interests. Morning stops will focus on glacial geology and hydrogeology, with stops at the Ellis River esker, mysterious fluvial features in the Split Brook valley, local sand/gravel pits, and more! The afternoon will feature a hike up beautiful Rumford Whitecap Mountain, with discussion of bedrock, mining, and glacial geology features. The hike is moderate to steep and approximately 5 miles round-trip, but well worth the effort with fantastic geology and 360° views. For those who may want to depart early, an overview of features on Whitecap will be given prior to the hike.

TIME, PLACE, LOGISITICS: Saturday, September 30th, 8:30 AM in the Maine DOT Riverside Rest Area on Route 2 (356262.00 m E, 4923630.71 m N) in Bethel, ME. From the intersection of Route 35 and Route 2 in Bethel, head east on Route 2 towards Rumford; the rest area will be on the right side in about 3.5 miles. We will consolidate vehicles as much as possible and head east from here, with an approximately 20-minute drive to the first stop. Please pack your lunch and water. There is one small bathroom at the meeting point, but we can’t guarantee that it will be open and there will not be any flush toilet stops on the trip, so plan accordingly. If you will be hiking Whitecap, please wear appropriate clothing and shoes – there are plenty of roots, rocks, and mud on the trail and it can be very windy and cold on the exposed summit. In the event of inclement weather, we will be able to go on a shortened hike. Please be mindful of the possibility of sunburn, ticks, and poison ivy.

 

B6: DEVONIAN GRANITE MELT TRANSFER IN WESTERN MAINE: RELATIONS BETWEEN DEFORMATION, METAMORPHISM, MELTING AND PLUTON EMPLACEMENT AT THE MIGMATITE FRONT
LEADERS: Gary S. Solar, Dept. of Earth Sciences, SUNY Buffalo State, Buffalo, New York, 14222: solargs@buffalostate.edu, cell: (716) 472-7015; Paul B. Tomascak, Dept. of Atmospheric and Geological Sciences, SUNY Oswego, Oswego, New York, 13126: tomascak@oswego.edu; Michael Brown, Dept. of Geology, University of Maryland, College Park, Maryland, 20742: mbrown@umd.edu

DESCRIPTION: This trip is focused on structural geology and petrogenesis of the Devonian (Acadian) migmatites and granites in the area between Rangeley and Rumford, Maine, at the northeastern migmatite front of the northern Appalachian migmatite-granite belt. We will examine the mineral fabrics in migmatites and granites, shapes and sizes of granite bodies (from leucosomes to plutons), and the relation of these to the regional structure. We begin with sub-solidus metasedimentary migmatite protoliths found north of the migmatite front (presumed protolith of migmatites), and then traverse south across the front, following a progression from low leucosome-percent metatexites (migmatites), to stromatic-structured metatexites with sub-concordant granite sheets, to diatexite, to granite plutons from 10m- to km-scale.

TIME, PLACE, LOGISTICS: Saturday September 30th, 7:30 AM at Coos Canyon, Byron, Maine (370739 m E, 4953177 m N), in the gravel Rest Area parking area on the east side of Maine Rt. 17 (across from Coos Canyon Campground, approximately 18 miles north of the Rt. 17 and U.S. Rt. 2 intersection in Mexico, Maine). There are privies at the rest area meeting site, but no other services or bathroom facilities during the trip. There will be no opportunities for acquiring provisions during the trip, so bring to the meeting site your lunch and everything you will need for a full field day. There will be short-distance, light hiking and scaling of rocks and wooded slopes, but otherwise no strenuous hikes. Dress accordingly for early fall Maine weather, including sturdy boots. Vehicles will be consolidated as necessary. Some stops will be accessed via logging roads so vehicles such as vans are required for some sections (for their ground clearances).

 

SUNDAY TRIPS

C1: TESTING THE COSMOGENIC NUCLIDE DIPSTICK MODEL FOR DEGLACIATION OF MOUNT WASHINGTON

LEADERS: P. Thompson Davis, Dept. of Natural & Applied Sciences, Bentley University, Waltham, MA 02452-4750, email: pdavis@bentley.edu, cell: (603) 553.4596; Alexandria J. Koester and Jeremy D. Shakun, Dept. of Earth and Environmental Sciences, Boston College, Chestnut Hill, MA 02467; and Paul R. Bierman and Lee B. Corbett, Dept of Geology, University of Vermont, Burlington, VT 05405

DESCRIPTION: This field trip will include a drive up Mount Washington’s Auto Road to the summit for examination of sample sites for cosmogenic nuclide exposure dating that are part of a NSF-funded research project to construct glacial dipsticks for the deglaciation history of northeastern United States and surrounding areas. Depending on the weather, those interested are invited to hike down the mountain about 7 km (about 4.5 miles) and 1200 vertical meters (about 4000 vertical feet) via the Nelson Crag Trail to visit additional sampling sites to those on the summit and along the Auto Road. The Nelson Crag Trail is steep and difficult, especially if wet, so those wishing to participate in this part of the field trip must be prepared for adversity. There also will be an opportunity for a guided tour of Mount Washington Observatory on the summit, where hot lunches and drinks also may be purchased. We will drive as a caravan to the summit, making two or three stops on the way up to observe sampling sites and the alpine landscape, including the Great Gulf cirque and the northern peaks of the Presidential Range. For those not hiking down, the field trip will end by 2 pm, allowing additional time for the drive home. For those hiking down, the field trip should end by about 5 pm.

TIME, PLACE, LOGISTICS: Trip begins on Sunday, October 1st, 7:30 AM, in the gravel parking area on the west side of NH Rte 16 to the immediate south of the Auto Road entrance (322363.00 m E, 4906302.00 m N). The base of the Auto Road is about 30 miles west of Bethel, Maine, and takes about 40 minutes to drive. From Bethel follow U.S. Rte 2 west to Gorham, NH, then take NH Rte 16 south to the Auto Road entrance.

Warning: Due to the fragile nature of the alpine ecosystem, please always walk on trails or rocks. Expect the possibility of extremely cold and unpredictable weather. Be prepared with proper clothing and good hiking boots for very rocky, uneven terrain, winter–like conditions, and perhaps extremely high winds. There are no bathroom facilities for those electing to hike down the Nelson Crag Trail. Vehicles must be consolidated. The folks at the Mt. Washington Auto Road have kindly agreed to charge us only $29 per vehicle and waive the passenger fee. Half-ton vans are permitted up the road but with a maximum passenger and luggage weight of 900 lbs (that means about six people, including driver). If you are planning on driving your vehicle, please carefully check the vehicle restrictions on the Auto Road web site that can be found at: http://mtwashingtonautoroad.com/drive-yourself/auto-road-vehicle-restrictions .

 

C2: FIELD RELATIONS, PETROGRAPHY AND PROVENANCE OF MAFIC DIKES, WESTERN MAINE.

LEADERS: David Gibson dgibson@maine.edu, Donald Osthoff and Chase Rerrick, Department of Geology, University of Maine at Farmington, Farmington, Maine 04938.

DESCRIPTION: This field trip will examine the plethora of mafic dikes that outcrop across western Maine. Hosted by the ~380my Songo granodiorite, the 296my Sebago granite and its associated migmatites, and the pegmatitic intrusions of the area, these dikes vary in size, mineralogy and geochemistry. The emphasis of this trip is toward basic field identification and mineralogy of mafic intrusions and is directed more toward undergraduates (professors might consider using this trip as a field lab with their students). However, the provenance and possible source(s) of these mafic magmas will also be highlighted as the trip unfolds.

After our assembly in Bethel we will drive generally southward to examine these mafic intrusions, and their host rocks, along mostly roadside exposures, with only short walks to each of the outcrops.

TIME, PLACE, AND LOGISTICS: Meet at the Casablanca Cinema 4 parking lot on Cross Street in Bethel (44° 24’ 40.73” N; 70° 47’ 30.64” W) at 8:30am on Sunday, October 1st. There will be limited opportunities to get food so you might consider bringing lunch with you. The trip will end close to access roads for I 95.

 

C3: TRANSECT FROM THE MIGMATIZED CENTRAL MAINE BELT TO THE BRONSON HILL ANTICLINORIUM

LEADERS: J. Dykstra Eusden, S. Baker, J. Cargill, E. Divan, I. Hillenbrand, P. O’Sullivan, and A. Wheatcroft, Dept. of Geology, Bates College, Lewiston, Maine 04240. email: deusden@bates.edu cell: (207) 240-9150

DESCRIPTION: This trip will visit outcrops along a transect from the migmatized Central Maine Belt in Maine to the Bronson Hill near the New Hampshire-Vermont border. We will roughly follow U.S. Rte. 2 starting in West Bethel, ME, with the migmatized Silurian Rangeley Formation (new DZ ages!) and intrusion of two mica granite (new ages!) and pegmatites, then proceed west to Randolph, NH, and the Ordovician Ammonoosuc Volcanics and Oliverian Jefferson Dome. The trip ends in Lancaster, NH with the Cambrian Albee Formation (new DZ ages!) and Ordovician Lost Nation Pluton. This is a good trip for those who are heading west or southwest after the conference.

TIME, PLACE, LOGISTICS: Sunday October 1st, 8:00 AM meet at the first STOP parking location which is the junction of Fleming and Mine Roads in West Bethel, Maine (350813.44 m E, 4917688.46 m N). To get to the meeting place from the Maine Mineral and Gem Museum in Bethel drive west on U.S. Rte. 2 about 5 miles and turn left (S) on to Fleming Road proceed for .2 miles and park at the junction with Mine Road. Bring your lunch and water. We will have a quick pit stop at the Subway sandwich shop in Gorham, NH. Ticks are really bad in the region so get those socks up over your pant cuffs!

 

C4: THE NEW HAMPSHIRE SPHERULITIC RHYOLITES: ROCKS OF IMPORTANCE TO PREHISTORIC NATIVE AMERICANS.

LEADERS: Sarah Baker, NH Geological Survey, NH Department of Environmental Services, 29 Hazen Drive, Concord, NH 03301; Richard Boisvert, New Hampshire Division of Historical Resources, Concord, NH 03301; Dyk Eusden, Department of Geology, Bates College, Lewiston, ME; Nathan Hamilton Department, of Geography and Anthropology, University of Southern Maine, Gorham ME, 04038; Stephen Pollock, 145 Ferry Road, Saco, ME 04072. email: Sarah.Baker@des.nh.gov cell: (207) 351 – 7662

DESCRIPTION: Rhyolite of probable Mesozoic age, with distinctive spherulitic textures crop out as dikes, and are found as blocks within glacial deposits or float in the New Hampshire Appalachians. While minor in the geological record these peculiar rock types are prominent in the archaeological history of New Hampshire and adjacent states and Quebec. This trip partially reprises a 1996 NEIGC trip on the geoarchaeology of Mount Jasper in Berlin, NH and provides updates on the significance of spherulitic rhyolite sources. The trip will compare the primary archaeological tool source in Berlin, NH to a spherulitic dike that is not known to have been exploited by Native Americans in Randolph, NH, but is the first discovered outcrop of the distinct variety of spherulitic rhyolite found as blocks in till and as artifacts in Jefferson, NH. The trip will also visit Mount Jasper in Berlin, which is on the National Register of Historic Places. The trip will examine and discuss the adit or mine, which was first recognized and referred to as “Indian Cave” in the middle of the 19th century. Workshop sites near the base of Mount Jasper, which were the subject of excavations in the middle 1980s will also be visited. Archaeological collections containing artifacts of spherulitic material will be made available for study and discussion. These spherulitic rhyolites were first used by Paleoindians. The historically well-documented dike on Mount Jasper was heavily mined from late Paleoindian through Woodland time. Archaeological sites within the region suggest that the dike was most heavily exploited during the Archaic period, and it gradually fell into disuse during the Woodland period. Paleoindian sites in Maine and Massachusetts, and at least one site each in New York and Quebec have recovered artifacts of spherulitic rhyolite. During the Archaic and Woodland periods the distribution of artifacts mined from Berlin was largely confined to the Androscoggin drainage.

TIME, PLACE, LOGISTICS: The trip will meet at the Meet Burger King Restaurant along Route 2 and 16 in Gorham, NH (UTM 0325844W 4917498N) at 8:30 AM on Sunday, October 1st. For orientation purposes the trip will begin at the new wind farm on Mount Jericho across from Mount Jasper. The wind farm consisting of five wind turbines is operated by Jericho Power LLC and L.S. Power Development LLC. The trip will visit dikes in Berlin and Randolph, NH. Each of these stops require a walk of approximately 2 kilometers round trip. The hike to Mount Jasper will be on a well – marked trail. The hike to the dike in Randolph will be through the woods. The hikes will be moderately strenuous. Participants will need to be in good physical condition. Appropriate foot wear and clothing are required. There will be opportunities to stop for facilities/food in Gorham, NH.

 

C5: RETURN TO THE SANDY RIVER

LEADERS: Julia Daly and Tom Eastler, Dept. of Earth and Environmental Sciences, University of Maine at Farmington, Farmington, Maine 04938 email: dalyj@maine.edu office: (207) 778-7403

DESCRIPTION: How can people living and working on floodplains mitigate cutbank erosion? This fieldtrip will re-visit several sand and gravel bars on the Sandy River that were part of a 2006 NEIGC trip. In the intervening decade, erosion at three of these sites prompted land owners to take three different approaches to mitigating landloss due to cutbank erosion. At one site, sand and gravel removal from a point bar was undertaken to alleviate erosional pressure on the opposite cutbank. At another site, a hardened berm was constructed at the upstream end of a point bar following the breaching of a borrow pond behind the bar during a winter flooding event. A third approach was the construction of a rootball revetment on an extensive cutbank, adjacent to existing boulder riprap. Each of these strategies interacts with channel processes and sedimentation differently, allowing us to consider potential differences in their short- and long-term impacts at each site. Because we have existing high-resolution topographic data from a decade ago, and subsequent satellite imagery, we can compare changes in the channel position over the past decade and discuss potential changes in the next decade. This trip should be a great opportunity for students and professionals interested in active processes to look at recent changes in a dynamic fluvial environment, and to consider the challenges people face living within this system.

TIME, PLACE, LOGISTICS :The trip will begin in on Rt. 4 in Avon and will end near Rt. 2 in Farmington Falls. We will begin at 9 AM at the tentative meeting place, an unserviced rest area on the north side of Rt. 4 at 373 Rangeley Rd, or 44.801871, -70.274910. We hope to update this location prior to September. This is approximately an 80 – 90 minute drive from Bethel, and not near facilities. We will pass through Farmington during the trip where restrooms, gas, and food may be found at several locations on Rt. 2. The last stop on the trip will be approximately 35 minutes to I-95 via routes 2 and 27.

 

C6: MIGMATITES IN PINKHAM NOTCH, NEW HAMPSHIRE

LEADER: Tim Allen, Department of Environmental Studies, Keene State College, Keene, NH 03435-2001, 603-358-2571, tallen@keene.edu

DESCRIPTION: We will examine metasedimentary rocks of the Central Maine terrane across a “migmatite front” and on into an in-situ anatectic granite (can you say “granitization?”), and discuss petrologic, geochemical, and isotopic evidence for the mode of migmatization, as well as looking at the structural and stratigraphic context. Are large localized migmatite zones (such as in Pinkham Notch and the Carter-Moriah /Wild River area (e.g., trip A6) the conduits through which magma passed as it migrated from sources deeper in the crust to be emplaced as plutons at higher crustal levels? This trip will re-visit many stops made on previous NEIGC and GSA field trips (Wall & Hatch, 1986, Allen, 1996, Allen et al., 2001).

TIME, PLACE, LOGISTICS: Sunday, October 1 at 8:00 a.m. at the Great Gulf Trailhead Parking Area (322940.00E 490800.00N), on the west side of NH Route 16, six miles south of Gorham, NH. WMNF recreation passes required for all vehicles. Bring lunch and water.