Pardee Keynote Symposium - P6
Pre-Mesozoic Impacts: Their Effect On Ocean Geochemistry, Magnetic Polarity, Climate Change, And Organic Evolution
Conveners: Charles A. Sandberg, Jared R. Morrow, Christian Koeberl |
|
Pre-Mesozoic comet and meteorite impacts, many far exceeding in magnitude those at the Cretaceous-Tertiary (K-T) boundary, produced extreme oceanic and climate changes, causing mass extinctions followed by rapid radiation of surviving organisms. Thus, they were a driving mechanism in early evolution of life on Earth. Glacial episodes and paleomagnetic changes also resulted from some major impacts. This symposium will explore impacts, as well as other extraterrestrial influences, on four major mass extinctions: the end-Precambrian, Late Ordovician, Late Devonian, and end-Permian. An evening forum on "The Role of Impacts on Evolution" will provide an opportunity to quiz speakers and poster presenters.
|
click for larger image (31kb).
|
