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The Proterozoic (pronounced /ˌproʊtrəˈzoʊɪk/) is a geological eon representing a period before the first abundant complex life on Earth. ...
en.wikipedia.org/wiki/Proterozoic - Similar
Sep 18, 2009 ... The time before the Phanerozoic, formerly called the Precambrian, is now divided into the Hadean, Archaean and Proterozoic eons. ...
en.wikipedia.org/wiki/Phanerozoic - Similar
An overview of the era from the UC Berkeley Museum of Paleontology.
www.ucmp.berkeley.edu/precambrian/proterozoic.html - Similar
Stromatolite diversity continued to increase through most of the Proterozoic. Until about 1 billion years ago, they flourished in shallow waters throughout ...
www.ucmp.berkeley.edu/precambrian/proterolife.... - Similar
An intro to the Proterozoic era, includes a review of each of the geological sub -divisions and the various forms of life that lived during this time.
www.palaeos.com/Proterozoic/Proterozoic.htm - Similar
Dec 16, 2008 ... The Proterozoic eon comprises the Paleo-, Meso-, and Neo- proterozoic eras, and is preceded by the Archaean eon. ...
www.newworldencyclopedia.org/entry/Proterozoic - Similar
Britannica online encyclopedia article on Proterozoic Eon (geochronology), the younger of the two divisions of Precambrian time, the older being the Archean ...
www.britannica.com/EBchecked/topic/479833/Proterozoic... - Similar
Britannica online encyclopedia article on Late Proterozoic Era (geochronology), During the late Proterozoic (Neoproterozoic Era), some orogenic belts, ...
www.britannica.com/EBchecked/topic/331369/Late... - Similar
Sep 17, 2009 ... The Proterozoic was a time in which multicellular algae began to appear. The continents grew in size and oxygen began to build up in the ...
www.nationalatlas.gov/articles/geology/legend/ages/pr... - Similar
Prot·ero·zoic (prät′ə rə zō′ik, prōt′-). adjective. designating or of the geologic eon characterized by the development of sedimentary rock, shallow seas, ...
www.yourdictionary.com/proterozoic - Similar
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