Post by L Roebuck on Aug 25, 2006 17:50:29 GMT -5
Heinrich H1 and 8200 yr B.P. climate events recorded in Hall's Cave, Texas
Brooks B. Ellwood (corresponding author), Louisiana State University, Geology and Geophysics, Baton Rouge, Louisiana 70803, USA; and Wulf A. Gose, University of Texas–Austin, Austin, Texas 78712, USA. Pages 753-756.
Sediments from Hall's Cave, central Texas, have been sampled for regional paleoclimate evaluation. Magnetic susceptibility measurements (how susceptible a sample is to becoming magnetized) were performed on a continuous vertical sequence of samples from an excavation in the cave, to develop a magnetic stratigraphy susceptibility profile for the site. Such measurements in cave sediments are sensitive to climate due to changes in soil formation rates. Results showed a number of important major climatic events were recorded in the cave, including the H1 Heinrich Event at ~17,200 B.P., the end of the last major glaciation at ~14,300 B.P., and the 8,200 B.P. climatic event. These results are consistent with other independent indicators of climate for the region, but provide better precision on the timing of events and indicate that caves can provide a unique laboratory where climatic variations are preserved.
Abstract Geological Society Of America
Brooks B. Ellwood (corresponding author), Louisiana State University, Geology and Geophysics, Baton Rouge, Louisiana 70803, USA; and Wulf A. Gose, University of Texas–Austin, Austin, Texas 78712, USA. Pages 753-756.
Sediments from Hall's Cave, central Texas, have been sampled for regional paleoclimate evaluation. Magnetic susceptibility measurements (how susceptible a sample is to becoming magnetized) were performed on a continuous vertical sequence of samples from an excavation in the cave, to develop a magnetic stratigraphy susceptibility profile for the site. Such measurements in cave sediments are sensitive to climate due to changes in soil formation rates. Results showed a number of important major climatic events were recorded in the cave, including the H1 Heinrich Event at ~17,200 B.P., the end of the last major glaciation at ~14,300 B.P., and the 8,200 B.P. climatic event. These results are consistent with other independent indicators of climate for the region, but provide better precision on the timing of events and indicate that caves can provide a unique laboratory where climatic variations are preserved.
Abstract Geological Society Of America