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The AAPG/Datapages Combined Publications Database
GCAGS Transactions
Abstract
Measuring Modern Sedimentation Rates in Caddo Lake (LA, TX) Using 137Cs Depth Profile
ABSTRACT
Modern sedimentation rates were measured by using gamma ray spectroscopy to measure the depth profile of 137Cs activity in sample cores from Caddo Lake. Seven cores were taken from various environments including a fresh water delta, back bays, and midlake channels, and also near inlet bayous and near the dam. The sedimentation rates vary from 0.56 ± 0.03 cm/yr (0.22 ± 0.01 in/yr) in a stream channel, 0.22 ± 0.03 cm/yr (0.09 ± 0.01 in/yr) in the freshwater delta region to unobservable amounts in the back bay and near the dam. Future work will involve more measurements of cores and modeling the data.
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