Trip fees include transportation during the trip and a guidebook. Other services, such as meals and lodging, are included as noted.
All trips begin and end at the Pennsylvania Convention Center in Philadelphia unless otherwise indicated. Upon return, some post-meeting trips can stop at the Philadelphia International Airport to discharge participants who have evening flights or would prefer to spend the night in a hotel closer to the airport. Trip itinerary details will be provided upon registration and can also be obtained directly from the field trip leaders; however, participants are cautioned against scheduling any tight travel connections with field trip return times, as those times are estimates and delays in the field may occur. For a list of hotels near the airport, contact Mollie VanOtterloo, +1-303-357-1060, .
- 25. A Tour of the Peach Bottom Slate — Once the Best Building Slate in the World 
Thurs., 26 Oct. — FULL
- Jeri Jones, Jones Geological Services, +1-717-225-3744, fax +1-717-840-7403, ; Mary Ann Schlegel; Charles Scharnberger; Donald Robinson.
- This trip to southern Lancaster and York County, Pennsylvania, will look at the mining heritage of the Peach Bottom Slate. This slate was voted the best building slate in the world in 1850 and has been used in such buildings as the Biltmore Mansion in Asheville, North Carolina, and state and federal buildings. Through citizen efforts, this heritage has been well preserved. Stops will include the contact between the Cardiff Conglomerate and Peach Bottom Slate; the Old Line Museum in Delta, including the world famous Slate Clock; the Funkhauser Quarry; the Slateville Presbyterian Church cemetery; the Welsh village of Coulsontown; and the Cardiff Serpentinite "Green Marble" quarry.
- Max.: 24; min.: 12. Cost: US$69 (L, R, vans).
- 26. Arsenic in Groundwater in the Newark Basin 
Thurs., 26 Oct. — FULL — Cosponsored by GSA Sedimentary Geology Division; GSA Geology and Health Division.
- Mike Serfes, New Jersey Geological Survey, +1-609-984-6587, ; Steve Spayd; Paul Olsen.
- Arsenic concentrations of up to 215 µg/L in groundwater have been measured in the Newark basin in New Jersey. This trip will summarize the findings of past and ongoing research related to the sources, occurrence, mobilization (including microbial-aided), transport, and treatment of arsenic in groundwater in the basin.
- Max.: 40; min.: 10. Cost: US$59 (L, R, bus).
- 27. Central Appalachian Transect along the Potomac River Corridor 
Thurs.-Fri., 26-27 Oct. — Canceled
- 28. Environmental Issues Associated with Sulfide Occurrences in Pennsylvania 
Wed.-Fri., 25-27 Oct. — Canceled
- 29. From the K-T to the Coast: Paleontology, Stratigraphy, and Coastal Sedimentation from the Late Cretaceous through the Quaternary, Southern New Jersey 
Thurs., 26 Oct.
- William Gallagher, New Jersey State Museum, +1-609-292-6330, ; Ken Lacovara.
- This trip will make a stop at the Inversand Pit in the New Jersey Coastal Plain where the K-T boundary and Late Cretaceous, Tertiary, and Quaternary deposits are exposed. The trip will then work its way out to the New Jersey shore, visiting several Pleistocene and Holocene strand lines along the way.
- Max.: 45; min.: 25. Cost: US$69 (L, bus).
- 30. Geologic, Hydrogeologic, and Biogeochemical Controls on Natural and Enhanced Degradation of Industrial Solvents in Fractured Rocks 
Thurs., 26 Oct. Cosponsored by U.S. Geological Survey.
- Dan Goode, U.S. Geological Survey, +1-717-571-8783, ; Claire Tiedeman.
- This trip will entail field examination of geologic conditions and investigative techniques for understanding degradation in fractured sedimentary rocks of the Newark Basin, using the local geology in West Trenton, New Jersey, from outcrop and a core from the former Naval Air Warfare Center (NAWC). Planned field demonstrations at the NAWC include surface geophysics (new rapid-deployment tools); borehole geophysics (with emphasis on detailed correlation using lithology and gamma); water levels and flow directions during pump and treat in highly heterogeneous formations characterized by bed-limited permeability; cross-hole flowmeter testing; monitoring of biogeochemical conditions using packers; diffusion and long-term grab samplers downhole; and monitoring bacteria, substrate, and contaminant concentrations during the Navy's biostimulation and bioaugmentation program.
- Max.: 60; min.: 20. Cost: US$65 (L,R, bus).
- 31. History and Geology of Gettysburg National Battlefield 
Thurs., 26 Oct.
- Roger Cuffey, Pennsylvania State University, +1- 814-865-1293, fax +1-814-863-8724, ; Jon Inners.
- Enjoy a full-day tour of America's Most Hallowed Ground lead by geologists who are also historians of the Civil War. The tour begins at the railroad cut on McPherson's Ridge, moves to Cemetery Ridge, then concludes on the Roundtops and Seminary Ridge. Visits to the observation tower and visitor's center (under construction) and town are also planned.
- Max.: 42; min.: 15. Cost: US$95 (R, bus).
- 32. Karst and Environmental Hydrology in Central Pennsylvania 
Wed.-Fri., 25-27 Oct.
- Richard Parizek, Pennsylvania State University, +1-814-865-3012, fax +1-814-238-5261, .
- This trip begins and ends in Philadelphia, with a wide loop through central Pennsylvania visiting outstanding examples of the region's Quaternary geology, karst hydrology, environmental geology, and hydro-engineering solutions to the problems presented by a growing population.
- Max.: 45; min.: 10. Cost: US$295 (3B, 3L, 3D, 2ON, vans).
- 33. Paleontology and Paleoenvironments of the Upper Devonian Catskill Formation in North-Central Pennsylvania 
Thurs.-Fri., 26-27 Oct.
- Ted Daeschler, Academy of Natural Science, Philadelphia, +1-215-299-1133, fax +1-215-299-1028, ; Walt Cressler.
- This two-day trip will explore the Catskill Formation in a series of road cut exposures. Stops include the Red Hill locality, source of abundant plant, arthropod, and vertebrate fossils, including the oldest tetrapods from North America, and several additional outcrops along the I-99 corridor.
- Max.: 27; min.: 12. Cost: US$175 (B, 2L, D, ON, vans).
- 34. Prehistoric Quarries and Early Mines in the New York-New Jersey-Pennsylvania Tri-State Metropolitan Area 
Thurs.-Sat., 26-28 Oct. Cosponsored by GSA Archaeological Geology Division.
- Philip C. LaPorta, City University of New York and LaPorta Associates, +1-845-986-7733, fax +1-845-988-9988, ; Margaret Brewer; Scott Minchak.
- This field trip is a first-ever visit for the archaeological and geological research community of prehistoric quarries in the metropolitan tri-state area. Prehistoric quarries and prehistoric mining technology in the Central Appalachians will be introduced to researchers. The field trip will visit Late Proterozoic–Early Cambrian jasper, Cambrian, Ordovician, and Devonian nodular chert, Ordovician quartz vein and steatite, Middle Ordovician bedded radiolarian, and Triassic argillite quarries. The focus of the trip will be on geological variables that promote the development of prehistoric Native American quarries and mines. Special attention will be paid to the ingenuity of mining extraction technology in quarries ranging in age from the Paleoindian Period to the Late Woodland. The terrain is moderate; hiking boots are recommended. The weather in October is cool (30 to 50 °F) and possibly rainy; therefore, layered, warm clothing and rain gear are needed.
- Max.: 12; min.: 6. Cost: US$299 (3L, 3R, 2ON, vans).