Exceptional Preservation
All but the smallest fraction of the fossil record consists of the robust skeletal matter of decayed corpses. Hence, since Ediacaran biota had soft bodies and no skeletons, their abundant preservation is surprising. The absence of burrowing creatures living in the sediments undoubtedly helped; since after the evolution of these organisms in the Cambrian, soft-bodied impressions were usually disturbed before they could fossilize.
Read more about this topic: Ediacaran Type Preservation
Famous quotes containing the words exceptional and/or preservation:
“Life’s so ordinary that literature has to deal with the exceptional. Exceptional talent, power, social position, wealth.... Drama begins where there’s freedom of choice. And freedom of choice begins when social or psychological conditions are exceptional. That’s why the inhabitants of imaginative literature have always been recruited from the pages of Who’s Who.”
—Aldous Huxley (1894–1963)
“If there is ANY THING which it is the duty of the WHOLE PEOPLE to never entrust to any hands but their own, that thing is the preservation and perpetuity, of their own liberties, and institutions.”
—Abraham Lincoln (1809–1865)