Why are the Doushantuo, Ediacaran, and Burgess Shale fossil deposits so unusual?

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They preserve a diverse array of microorganisms that we believe gave rise to multicellular life at the start of the Cambrian period.

These assemblages show precisely how animals began as single-celled organisms, then became two-celled, then four-celled, and so on, to become the multicellular forms we know today.

They capture a wide range of soft-bodied organisms that are rarely preserved in the fossil record at a time when the diversity of metazoans was greatly increasing.

These fossils record the origin of animals from seaweeds and other photosynthetic organisms.

 

asked Dec 28, 2012 in Biology by anonymous
    

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They capture a wide range of soft-bodied organisms that are rarely preserved in the fossil record at a time when the diversity of metazoans was greatly increasing.

 

answered Dec 28, 2012 by anonymous

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