Proterozoic definitions

Proterozoic

1) Early
Found on https://www.crosswordclues.com/clue/proterozoic

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Proterozoic

The Proterozoic k is a geological eon representing the time just before the proliferation of complex life on Earth. The name Proterozoic comes from Greek and means `earlier life`. The Proterozoic Eon extended from {val|2500|ul=Ma} to {val|542.0|1.0|u=Ma} (million years ago), and is the most recent part of the Precambrian. It is subdivided into t.....
Found on http://en.wikipedia.org/wiki/Proterozoic

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Proterozoic

An era of geological time spanning the period from 2,500 million years to 570 million years before present.
Found on http://www.australian-shares.com/glossary-of-terms.php.html

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Proterozoic

The Proterozoic (also called the Cryptozoic) was an eon in geological time that lasted from 2.5 billion years ago to 540 million years ago. During the Proterozoic Eon, the first multicellular life evolved, including colonial algae, solf-bodied invertebrates, and sponges.
Found on http://www.enchantedlearning.com/subjects/dinosaurs/glossary/

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Proterozoic

geological era between 2500 and 800 million years ago;
Found on http://www.encyclo.co.uk/visitor-contributions.php

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Proterozoic

Geologic eon that occurred from 570 to 2500 million years ago. During this time period, the first single-celled and multi-celled eukaryotic organisms evolved and developed.
Found on http://www.physicalgeography.net/physgeoglos/p.html

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Proterozoic

[adj] - (geology) formed in the later of two divisions of the Precambrian era 2. [n] - from 2,500 to 544 million years ago
Found on http://www.webdictionary.co.uk/definition.php?query=Proterozoic

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Proterozoic

Proterozoic The older Paleozoic faunal epoch, the age of primitive invertebrates.
Found on http://www.wordinfo.info/words/index/info/view_unit/1765/

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proterozoic

adjective formed in the later of two divisions of the Precambrian era; `proterozoic life forms`
Found on https://www.encyclo.co.uk/local/20974

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Proterozoic

The final era of the Precambrian, spanning the time between 2.5 billion and 544 million years ago. Fossils of both primitive single celled and more advanced multicellular organisms begin to appear in abundance in rocks from this era. Its name means 'early life.'
Found on https://www.encyclo.co.uk/local/21202

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Proterozoic

The geologic eon lying between the Archean and Phanerozoic eons, beginning about 2.5 billion years ago and ending about 0.57 billion years ago.
Found on https://www.encyclo.co.uk/local/22327

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