FIELD TRIPS

We are planning to publish a field guide for trips associated with this meeting that that would be published before the meeting in April and available for sale at the meeting. The deadline for manuscript submissions is 29 October 2012 (if editors handle peer review) or 30 November 2012 (if the paper is submitted with 2 reviews).

Field Trip Brochure (PDF)

Barton Creek
  1. Urban Hydrogeology of Austin, Texas.
    Wed., 3 April
    Cost: US$75, includes transportation, lunch, and a field guide.
    C.M. Woodruff, Jr., Edward W. Collins, and Raymond M. Slade, Jr. (University of Texas at Austin, Jackson School of Geosciences, Bureau of Economic Geology).
    DESCRIPTION: This field trip will visit a number of sites of importance to the hydrogeologic setting of Austin, including surface water and groundwater as well as geologic controls on weather and climate.  We will consider the physical setting of the city along the Balcones Escarpment, which localizes periodic flood-producing storms with major impacts on engineered facilities.  We will visit sites of historic flooding and consider the implications of such a geologic hazard on a fast-growing city.  We also consider recurrent droughts that pose the opposite extreme within the spectrum of hydrogeologic processes.  We will address groundwater in context both of a karstic artesian aquifer and of local water-table systems and will consider both quantity of water available and water-quality issues.  Finally, we consider the influence of the cityscape itself on the hydrologic environment.
  2. The Llano Uplift, Central Texas: Field Trip for Teachers and Geologists at Any Level.
    Sponsored by the TXESS Revolution Program at UT Austin; GSA Geoscience Education Divsion
    Sat., 6 April
    Cost: US$100 (Teachers US$40, up to 25 teachers at this rate), includes includes transportation, box lunch, water, BBQ dinner at County Line on the Hill, field itinerary.
    Leon Long, Laurie Schuur Duncan, Hilary Olson, and Rich Ketcham (University of Texas at Austin, Jackson School of Geosciences).
    DESCRIPTION: The Llano Uplift, central Texas, contains igneous, sedimentary, and metamorphic rocks, geologic structures (faults, folds), fossils, and complexly developed landscapes, spanning ages ranging from 1.4 billion years to Recent. Probably nowhere else on Earth can such a rich assortment be visited in a single day; every few kilometers down the road is another new and instructive geologic environment. This field trip is designed for teachers at any level, and all other generalist geologists. The stops provide classic demonstrations or examples of:  the laws and principles of stratigraphy, granite and carbonate rocks, and types of unconformity and cross-cutting relationships. The field trip begins and ends in Austin, and the fee includes box lunch and barbeque dinner at County Line on the Hill.
  3. Late Cretaceous Strata and Vertebrate Fossils of North Texas.
    Sat., 6 April
    Cost: US$75, includes transportation from Southern Methodist University in Dallas to and from the field localities, lunch, and a field guide.
    Louis L. Jacobs, Michael J. Polcyn, John Wagner, and Dale Winkler (Southern Methodist University, Huffington Department of Earth Sciences).
    DESCRIPTION: Late Cretaceous strata of North Texas (Woodbine, Eagle Ford, Taylor, and Austin) range in age from Cenomanian through Maastrichtian and represent a variety sedimentary environments.  They also present an exemplary record of marine reptiles, including sea turtles, plesiosaurs, and an almost complete record of the 30 million year evolutionary historyof mosasaurs.  In the subsurface the units have been legendary in the petroleum industry since early in the last century and interest has been revitalized through application of technological advances.  We propose a two day field trip from DFW airport to the North Sulphur River to examine these units and fossil localities in outcrop.
  4. Friesenhahn Cave: Late Pleistocene Paleoecology and the Predator-Prey Relationships of Mammoths with the Extinct Scimitar Cat.
    Sat., 6 April
    Cost: US$75, includes transportation, lunch and beverages, fieldtrip guidebook and supplemental materials.
    Russell W. Graham (EMS Museum, The Pennsylvania State University); Ernest L. Lundelius, Jr. (Vertebrate Paleontology Laboratory, J.J. Pickle Research Center, University of Texas at Austin); Laurence Meissner (Dept. of Biology, Concordia University).
    DESCRIPTION: The trip will visit Friesenhahn Cave, a well-known late Pleistocene fossil vertebrate locality since the turn of the 20th century. Participants will be able to go into the cave and see its physical environment. Climbing down a thirty foot ladder is required to enter the cave. Inside the cave, field trip leaders will discuss the history and locations of previous excavations of the cave, its stratigraphy (although all excavation areas have been backfilled) and age of the deposits, and its paleoecological significance. The age structure of the Scimitar cat sample and the predator-prey relationship between juvenile mammoths and the extinct scimitar cat will also be discussed in detail.
  5. The Search for Devil's Eye: Retrace the Historic Dumble Survey with Modern Mobile Technology.
    Sat., 6 April — Canceled.
     
  6. Traversing the Trinity and Edwards Karst Aquifers along the Blanco River Basin.
    Sat., 6 April — Canceled.
     
  7. Late Cretaceous (Campanian) Submarine Volcanism and Associated Carbonate Deposition, Austin Area, Central Texas.
    Sponsored by the Austin Geological Society
    Sat., 6 April
    Cost: US$95, includes transportation, lunch and beverages, fieldtrip guidebook and supplemental materials.
    S. Christopher Caran, P.G. (Texas Water Development Board); Alan J. Cherepon, P.G. (Texas Commission on Environmental Quality), and other contributors.
    DESCRIPTION: Localities in Austin afford excellent exposures of Late Cretaceous (Campanian) igneous extrusions, sedimentary deposits of volcanic ejecta, and low- to high-energy carbonate accumulations in direct association with submarine tuff mounds. These exposures reveal features of the types found in oil and gas fields developed in 'serpentine plugs,' which are buried tuff mounds and their associated carbonates. Recent discovery of a rich invertebrate fauna in strata flanking one of the largest mounds provides a wealth of information concerning these dynamic paleoenvironments. The field trip will visit important sites including: Pilot Knob and nearby areas, exposures across the facies tract from the volcanoes into surrounding deeper water environments; and the first lava tube and pillow lavas discovered in association with any of the 200 Late Cretaceous volcanoes in central and southern Texas.
  8. Basal Eocene Sabinetown Transgression in the Upper Wilcox Group of Central Texas, Bastrop County, Texas.
    Sat., 6 April — Canceled.
     
  9. Geology and Geomorphology of the Enchanted Rock State Natural Area, Central Texas.
    Sat., 6 April
    Cost: US$90, includes transportation, lunch, a field guide, admission to the park, and snacks.
    Rob Reed (University of Texas at Austin, Jackson School of Geosciences, Bureau of Economic Geology).
    DESCRIPTION: Enchanted Rock State Natural Area is a unique gem of the Texas Hill Country. This field trip will highlight the geomorphology and geology of the Precambrian (1,080 Ma) pink porphyritic granite exposed in the park. Participants will climb Enchanted Rock (a 130 meter high granite exfoliation dome), and take in the panoramic vista visible from the top. Also discussed will be the 1.3 billion year history of Central Texas geology and its impact on the landscape. The contact zone between the granite and the surrounding country rock will also be examined.
  10. Traverse of Tertiary Sedimentary Rocks (Paleocene-Miocene), Central Texas Gulf Coastal Plain.
    Co-sponsored by GSA Sedimentary Geology Division
    Sat., 6 April
    Cost: US$95, includes transportation, lunch, and a field guide.
    Earle F. McBride and Charles M. Woodruff (University of Texas at Austin, Jackson School of Geosciences).
    DESCRIPTION: This trip will examine exposures of fluvial, deltaic, and marine rocks from late Paleocene to Miocene age between Elgin and LaGrange. Sediments derived from the Rocky Mountains gave way to sediments with major silicic volcanic sources and then to carbonate detritus scrubbed off the Edwards Plateau following Balcones fault events.  Although most outcrops are small, they reveal a dynamic sedimentary and diagenetic history.
  11. Carbon Capture and Geologic Storage: Global Research Centered in Texas.
    Co-sponsored by Gulf Coast Carbon Center, Bureau of Economic Geology
    Fri., 5 April
    Cost: Complimentary. Check the space on the registration form if planning to attend. Includes hors d'oeuvres, beverages, and transportation.
    Susan Hovorka and Tip Meckel (University of Texas at Austin, Jackson School of Geosciences)
  12. A Tale of Two Aquifers: Deciphering Characteristics of the Edwards and Trinity Aquifers in Central Texas.
    Co-sponsored by Edwards Aquifer Authority
    Fri., 5 April
    Cost: $50. Includes hors d'oeuvres, beverages, and entrance fee to the cave.
    Marcus Gary, (Edwards Aquifer Authority)
    DESCRIPTION: This special field trip/session will be held at Natural Bridge Caverns, a large commercial cave that is formed in both the Edwards and Trinity Group limestones. Includes a poster session, cave tour, dinner, drinks, and a special oral session held underground in the cave. This field trip begins and ends at the cavern, which is approximately 70 miles from the AT&T Center. If you are interested in presenting your abstract during this field trip, please submit your abstract to Theme Session 29, prior to the abstracts deadline of 15 January.

top

To GSA Home pageMeeting Home page GSA's 125th Anniversary