2008 Joint Meeting of The Geological Society of America, Soil Science Society of America, American Society of Agronomy, Crop Science Society of America, Gulf Coast Association of Geological Societies with the Gulf Coast Section of SEPM

Paper No. 7
Presentation Time: 9:30 AM

Comparing Holocene Sediment Flux of Coastal Plain Rivers to Low Relief Glaciers, Northwestern Gulf of Mexico and South Shetland Islands, Antarctica

MILLIKEN, K.T.1, ANDERSON, J.B.1 and WELLNER, Julia2, (1)Earth Science, Rice University, 6100 Main St MS 126, Houston, TX 77005, (2)Department of Geosciences, University of Houston, 312 Science & Research Building 1, Houston, TX 77204-5007, milliken@rice.edu

Mass accumulation rates (MAR) of low relief, small coastal plain rivers are comparable to MAR of low relief, small glacial drainage systems. The drainage basin area of coastal plain rivers in Texas and Louisiana range from 8000 km2 to 52,000 km2 with 50 m to 700 m relief. The glacial drainage area of Collins ice cap on King George Island (South Shetland Islands) is approximately 200 km2 with 700 m maximum relief. The MAR of the Texas and west Louisiana coastal plain rivers average 2 kg/m2/a whereas the MAR of Maxwell Bay averages 4 kg/m2/a. The glacial system with a factor of 40 to 250 times smaller drainage area is more efficient at sediment delivery than equivalent relief coastal plain rivers.