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Saturday, 28 August 2010
Friday, 27 August 2010
FOSSILS OF OREGON: FARALLON PLATE
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The Farallon Plate took a turn north some 57 million years ago, sweeping much of western coastal Oregon along with it. The Cascades were beginning to uplift and were fast becoming the breakwater for a retreating Pacific Ocean.
By the middle Oligocene, the Cascadia Subduction Zone was in full force with growing pressure erupting volcanoes along the Western Cascades, a pattern that was to continue well into the Miocene. The soft ocean sediments of Oregon contain beautifully preserved gastropods, bivalves and cephalopods.
Wednesday, 25 August 2010
Friday, 20 August 2010
Wednesday, 11 August 2010
Friday, 6 August 2010
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