NATS 1540 Study Guide - Natural Selection, Blast Wave, Shocked Quartz
16 Oct 2012
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** catastrophe is always the beginning of something. 600 mya - palaeozoic era (1st life - 250-75 mya - mesozoic era (middle life - secondary) : Amphibians and reptiles (ex. shells, fishes, land-living saurians - crawlers) 75 - 10 mya - tertiary or cenozic. 10 mya - present - quaternary (recent life) : Dried up creek bed a drop stone. The drop stone must have been transported from hundreds of miles away. Very hot area, no signs of ice/ glaciers. Many random rocks obviously out of place. 650 million years ago, it was sealed in ice. Drop stones there date back to the same time as those found in flinders: measuring a piece of the drop stone to determine its magnitude to locate its origin. Each rock has its unique magnetic signature - measures magnetic fields. Acid rain is formed when hitting rock , washes into the oceans, washed to the bottom of limestone locked the co2 into the rocks.
