HR: 0800h
AN: GP31A-0075    [Abstracts]
TI: Gravity Maps of the Weaubleau Quadrangle, South Central Missouri
AU: * Stoddard, P R
EM: prs@geol.niu.edu
AF: Northern Illinois University, Department of Geology and Environmental Geosciences, DeKalb, IL 60115-2854 United States
AU: Shoberg, T
EM: tshoberg@pittstate.edu
AF: Pittsburg State University, Department of Physics, Pittsburg, KS 66762-7501 United States
AB: In the August of 2001 we conducted a gravity survey of the Weaubleau (pronounced Wah-blow), MO quadrangle (located approximately 90 km north of Springfield). The gravity data were collected using a LaCoste Romberg Model D gravimeter with position and elevation data collected by a Trimble GPS Pathfinder Pro XRS receiver. Elevation data were checked against the USGS topographic data, using DeLorme map software. A total of one hundred and ten stations were occupied. These data are reduced and presented as free air and Bouger gravity maps of the Weaubleau quadrangle. This area has proven interesting because of an intense deformation of Mississippian and older formations whereas Pennsylvanian formations, which unconformably overly these, are largely undeformed. The cause of this deformation has alternately been attributed to meteorite impact, cryptocrystalline volcanic disturbance or widespread horizontal compression. We look for features having circular symmetry which would support an impact origin, or having a preferred orientation, which would support the compression origin.
DE: 0920 Gravity methods (1219)
DE: 1219 Gravity anomalies and Earth structure (0920, 7205, 7240)
DE: 5420 Impact phenomena, cratering (6022, 8136)
SC: Geomagnetism and Paleomagnetism [GP]
MN: Fall Meeting 2005