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 Ocean floor
 513 million years ago

Mean atmospheric O2
 63% of modern level

Mean atmospheric CO2
 16x pre-industrial level

Mean temperature
 7C above modern level


Paleozoic Earth - Middle Cambrian Dinomischus on the ocean floor; Drumian Stage; Burgess Shale; metazoans - Natural History Illustration Geologic Time Scale

Eon: Phanerozoic
 Era: Paleozoic
  Period: Cambrian
   Epoch: Middle
    Age: Albertian*


Middle Cambrian Dinomischus

Resembling modern flowers, Dinomischus isolatus populate the ocean floor about 513 million years ago. About four inches tall, Dinomischus isolatus was an animal permanently attached to the ocean floor by a stalk. It probably fed by filtering the surrounding seawater for nutrients, and may have created a current to facilitate this. Its mouth and anus were positioned side-by-side.

*AKA St Davids


Copyright Walter B. Myers. All rights reserved.

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