roadcut at Branson airport
New road cut at Branson Airport exposes the sub-Mississippian unconformity, above the lower Ordovician (Ibexian Series) Cotter Dolomite. Lower Mississippian strata include the Compton Limestone, Northview Formation (red and green siltstone in middle part), and Pierson Limestone. Field trips 1 and 6 will stop at this locality (click on photo for larger image).


GSA invites you to join your colleagues on one or more of the combined NC-SC meeting field trips.

Trip fees include transportation during the trip as well as a trip guide. Other services, such as meals and lodging, are noted by the following: B—breakfast, L—lunch, R—refreshments, D—dinner, ON—overnight lodging.

All trips begin and end at the Branson Convention Center/Branson Hilton Hotel at Branson Landing unless otherwise indicated.

Details about the precise trip itineraries will be provided with registration confirmation, or you may contact field trip coordinators James S. Aber and Kevin R. Evans.


1. High-Resolution Stratigraphy of Upper Devonian and Lower Mississippian Strata of the Ozark Region with Reference to Subsurface Kansas and Oklahoma.
Cosponsored by Oklahoma City Geological Society, Arkansas Geological Survey, Kansas Geological Survey, Missouri Department of Natural Resources Division of Geology and Land Survey, Oklahoma Geological Survey, and the Pander Society.
Wed.-Fri., 7-9 April. Cost: US$330 (2ON, 2L, 3R). Min. 35; max.: 53.
Darwin R. Boardman II, T. Boone Pickens School of Geology, Oklahoma State University, 105 Noble Research Center, Stillwater, OK 74078-3030, USA, +1-405-744-5315; S.J. Mazzullo; Brian Wilhite; Jim Puckette; Thomas L. Thompson.
This three-day field trip will provide a preliminary sequence stratigraphic model for Upper Devonian through Mississippian strata from the Burlington Shelf into the starved basin in Oklahoma, using a multidisciplinary approach that integrates outcrop and subsurface lithostratigraphy and biostratigraphy. Conodont biostratigraphy provides the chronostratigraphic component for development of a high-resolution sequence stratigraphic model; extensive new conodont localities are highlighted along with exposures coincident with the Tournaisian-Visean and Visean-Serpukhovian boundaries. Sedimentology, carbonate diagenesis, and sequence stratigraphy provide a depositional framework of coeval shelf, slope, and basinal strata.
This field trip highlights the exploration potential for widespread stratigraphic traps in Mississippian carbonate and chert reservoirs through enhanced secondary porosity and permeability resulting from periodic meteoric subaerial exposure. Additionally, potential gas shale reservoirs of the high-shelf Woodford correlative (formerly the Chattanooga Shale) and Fayetteville Shale will be addressed. A one-day core workshop will be offered after the field trip, on Saturday, 10 April. Subsurface cores from Kansas and Oklahoma will be highlighted, including Cowley Formation spiculitic oil and gas reservoir facies in Kansas, and a basinal core from Oklahoma with Woodford-Caney shales.
2. Route 66 — Geology and Legacy of Mining in the Tri-State District of Missouri, Kansas, and Oklahoma.
Cosponsored by the National Association of Geoscience Teachers.
Sat.-Sun. (morning), 10-11 April. Cost: US$130 (ON, L, 2R). This trip is full.
James S. Aber, Earth Science Department, Emporia State University, 1200 Commercial St., Emporia, KS 66801-5087, USA, +1-620-341-5981; Susan W. Aber; Gina Manders; Robert W. Nairn.
This trip follows historic Route 66 through southwestern Missouri, northeastern Oklahoma, and southeastern Kansas, and overviews the general geology and hydrology of the region. Special emphasis is given to the history and methods of mining lead and zinc ore as well as the fossil fuel, namely coal, to smelt the ore. Ongoing environmental problems and remediation efforts are prominent subjects at several localities. Highlights of the trip include Big Brutus, one the world's two largest electric-power shovels near West Mineral, Kansas; the environmental debacle and recent tornado damage at Picher, Oklahoma; and a passive treatment system for acid-mine water at Commerce, Oklahoma. Other sites include Grand Falls at Joplin, Missouri; Schermerhorn Park and Empire Lake near Galena, Kansas; and flooding at Miami, Oklahoma.
3. Civil War and Cultural Geology of Southwestern Missouri, Part 1: The Geology of Wilson's Creek Battlefield and the History of Stone Quarrying.
Cosponsored by the National Association of Geoscience Teachers.
Sat. 10, April. Cost: US$75 (L, R). This trip is full.
Joe Hannibal, Cleveland Museum of Natural History, 1 Wade Oval Drive, Cleveland, OH 44106-1767, USA, +1-216-231-4600 ext. 3233; George H. Davis; Sherman Lundy; Kevin R. Evans.
This trip will feature the geology and history of the Wilson's Creek Battlefield, the National Cemetery in Springfield, the classic Phenix "marble" quarry, the Springfield Underground, and more. This one-day trip is suitable for guests as well as professional geologists. Trip will begin at 8 a.m. and will return to the conference center by 6 p.m.
4. Innovative Storm-water Management Practices.
This trip has been canceled.
5. Introduction to Karst Landscape Development — Ozark Underground Laboratory.
Sun. (morning), 11 April. US$45 (R). This trip is full.
Tom Aley, Geography, Geology, and Planning, Missouri State University, 901 S. National Ave., Springfield, MO 65897, USA, +1-417-836-5228; Douglas Gouzie.
The Ozark Underground Laboratory is a well-known karst environmental resource near Branson, Missouri. The laboratory provides a controlled environment for a variety of cave-research in nearly 9,000 feet of passage in Tumbling Creek Cave. In addition to the cave, a number of common karst features are observed on the land surface of the facility. This half-day trip will provide an introduction to basic karst features and processes, followed by a tour through portions of Tumbling Creek Cave. Hardhats and headlamps will be provided for the cave tour; participants should wear closed-toe shoes (gym shoes, boots) and be prepared to walk on a variety of pathway surfaces.
6. Civil War and Cultural Geology of Southwestern Missouri, Part 2: Geologic Influences on the Battle of Forsyth, Guerilla Activities, and Post-War Vigilantism.
Cosponsored by the National Association of Geoscience Teachers.
Sun. (morning), 11 April. Cost: US$50 (R). Min.: 4; max.: 14.
Kevin R. Evans, Geography, Geology, and Planning, Missouri State University, 901 S. National Ave., Springfield, MO 65897, USA, +1-417-836-5590; George H. Davis.
This trip will feature the geology of Taney County and discuss the influences of geology on bushwhacking, a minor military engagement, and post-war vigilantism activities; featured locations include the Ten O'Clock Run Fault, Branson Airport road cuts, Murder Rocks, Bear Cave, Snapp Balds, and Shadow Rock Park. This half-day trip is suitable for guests as well as professional geologists. Trip will begin at 8 a.m. and will return to the conference center by 12:30 p.m.


7. Geomorphology and Paleontology of Riverbluff Cave, Springfield, Missouri.
Cosponsored by the National Association of Geoscience Teachers.
Tues. (afternoon), 13 April. Cost: US$50 (R). This trip is full.
Charles W. Rovey II, Geography, Geology, and Planning, Missouri State University, 901 S. National Ave., Springfield, MO 65897, USA, +1-417-836-6890; Matt Forir; Greg Balco; David Gaunt.
Riverbluff Cave preserves spectacular trackways, clawmarks, and bone beds. Sediment as old as 1.1 million years is present within the cave, based on paleomagnetic and cosmogenic-isotope techniques, and gravel beds with a concentration of mammoth and horse bones are dated at 0.74 0.5 million years old, within error limits of the Matuyama-Bruhnes transition. We will examine the cave and its sediments in the context of fluvial events within the James River Basin. Caving equipment will be supplied; the trip into the cave requires rigorous physical activity, including crawling.
8. Rift-Related Volcanism and Karst Geohydrology of the Southern Ozark Dome; Montauk to Big Spring — Geologic Framework of the Upper Current River Region.
Tues. (afternoon) through Thurs., 13-15 April. Cost: US$255 (2ON, 2B, 2L, 3R). This trip is full.
Gary R. Lowell, The University of Texas at Arlington, Geology and Environmental Sciences, P.O. Box 19049, Arlington, TX 76019-0049, USA, +1-817-272-0771; Richard W. Harrison; David J. Weary; Randall C. Orndorff; John E. Repetski.
This field trip will examine and explore major karst features developed in Paleozoic carbonate strata on the Current River, including Montauk, Round Spring, Alley Spring, and Big Spring. The average discharge of latter is 276 106 gpd and is rated in the top 20 springs in the world. Another, Round Spring, is equally spectacular with an average discharge of 24 106 gpd. Both are major contributors to the Current and Eleven Point River drainage system, which also includes ~50 Proterozoic volcanic knobs and two granite outcrops. These knobs are mainly caldera-erupted ignimbrites with a total thickness of 7-8 km. They are overlain by post-collapse lavas and domes dated at 1470 million years old. Volcaniclastic sediment and air-fall lapilli tuff are widely distributed along this synvolcanic unconformity. Additional stops will examine volcanic features and the southernmost granite exposure in Missouri. The trip concludes with a discussion of the Missouri Gravity Low, the Eminence caldera, and the volcanic history of southern Missouri.
9. Geology of Weaubleau and Decaturville Impact Structures, Missouri.
Cosponsored by GSA's Planetary Geology Division; Pander Society.
Tues. (afternoon) through Wed., 13-14 April. Cost: US$150 (1ON, B, L, 2R). Min.: 12; max.: 12.
James F. Miller, Missouri State University, Geography, Geology, and Planning, 901 S. National Ave., Springfield, MO 65897, +1-417-836-5447; Kevin R. Evans.
Weaubleau and Decaturville are impact structures along the 38th parallel. This field trip will examine the structural deformation and biostratigraphic constraints on the ages of these structures, and discuss processes in oblique impacts. Discussions will include arguments for and against the serial impact hypothesis. This field trip will depart from the convention center at 1 p.m. and return the following day at 6 p.m.
10. Geology of the Taum Sauk Reservoir Scour, Missouri.
Cosponsored Missouri Department of Natural Resources.
Tues. (afternoon) through Wed., 13-14 April. Cost: US$170 (1ON, B, L, 2R). Min.: 10; max.: 12.
Cheryl M. Seeger, Missouri Dept. of Natural Resources, Division of Geology and Land Survey, P.O. Box 250, 111 Fairgrounds Rd., Rolla, MO 65402, USA, +1-573-368-2184; David Wronkiewicz.
The Taum Sauk Reservoir failure in December 2005 scoured vegetation and surficial materials from the flank of Proffit Mountain. This trip will explore the scour from near the base of the reservoir to the valley of the East Fork of the Black River, nearly 1.5 miles away. The event exposed large areas of Precambrian igneous and Cambrian dolomite bedrock normally not visible in the St. Francois Mountains of southeast Missouri. The flood also deposited sediments exhibiting characteristics of high-energy events. The trip will also visit sites of petrologic and structural significance in the St. Francois Mountains terrane.
11. Geology and Karst Landscapes of Buffalo National River, Northern Arkansas.
Wed., 14 April. US$70 (L, R). This trip is full.
Mark Hudson, U.S. Geological Survey, P.O. Box 25046, MS 980, Denver, CO 80225, USA, +1-303-236-7446; Kenzie J. Turner; Chuck Bitting.
Scenic Buffalo National River, administered by the National Park Service, lies in a watershed that exposes the three major Ozark Plateaus and provides some of the best bedrock exposures of the midcontinent. This trip will provide an overview of the central Buffalo National River region and will include key stops to illustrate stratigraphic and structural controls on karst landform development. It will address the effects of both a spatially variable Paleozoic stratigraphy and late Paleozoic faulting and folding on the location of major springs, caves, and recharge basins within two stacked karst aquifers.


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