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Which geologic period came immediately before the Cambrian Period?
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Cambrian Period
Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the late Cambrian Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.
The geologic period that occurred immediately before the Cambrian Period is the Ediacaran Period.
The Ediacaran Period, which was the final division of the Proterozoic Eon, spanned from approximately 635 million to 541 million years ago. It is well known for the Ediacara fauna, a collection of soft-bodied, multicellular organisms that represent some of the earliest evidence of complex animal life on Earth.12