Precambrian - Wikipedia, the free encyclopedia
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The Precambrian ( Pre-Cambrian ) is an informal name for the span of time before the current Phanerozoic Eon, and is divided into several eons of the geologic timescale. It spans from the format...
en.wikipedia.org/wiki/Precambrian
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THE PRECAMBRIAN ERA; The Precambrian Era. The name means: "before the Cambrian period." This old, but still common term was originally used to refer to the whole period of earth's history before the formation of the oldest rocks with recognizable fossils in them.
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www.geo.msu.edu/geogmich/Precambrian.html
www.geo.msu.edu/geogmich/Precambrian.html
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The Precambrian Era is Earth's first era of time. It began with the creation of the Earth around 4.6 billion years ago and lasted until 570 million years ago. The Precambrian saw many drastic changes during this time.
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www.kinderscience.com/precambrian_era.htm
www.kinderscience.com/precambrian_era.htm
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The Precambrian era is the first geologic time period of the earth. It is made up of the Archaen and Proterozoic Eras. ... footer for precambrian era page...
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www.fossils-facts-and-finds.com/precambrian_era.html
www.fossils-facts-and-finds.com/precambrian_era.html
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The Precambrian is actually a segment of time that includes two eras, the Proterozoic and the Archaean that span billions of years. ... The Precambrian Era makes up all time from the beginning of the Earth (about 4.5 billion years ago) until the start of the Cambrian, about 544 mya. This represents about 88% of all of...
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www.lycos.com/info/precambrian--precambrian-era.html
www.lycos.com/info/precambrian--precambrian-era.html
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The Precambrian Era or Super Eon, spans from time of Earth's formation around 4500 Ma, till evolution of macroscopic shelled animals of Cambrian Era. Inspite of a poor fossil presence to support geologic timescale, unearthed specimens educate us on earliest multi-celled life forms, that inhabited planet... ... Cenozoic Era...
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www.buzzle.com/articles/the-precambrian-era.html
www.buzzle.com/articles/the-precambrian-era.html
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An intro to the Precambrian era, includes a review of each of the geological sub-divisions and the various forms of life that lived during this time ... Precambrian Time ; Hadean Eon; Archean Eon; Proterozoic Eon; Phanerozoic Eon ; Paleozoic Era ; Mesozoic Era; Cenozoic Era...
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www.palaeos.com/Timescale/Precambrian.htm
www.palaeos.com/Timescale/Precambrian.htm
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The Precambrian Era was originally designated as all the rocks below or older than the Cambrian. These rocks, older than 544 million years, were originally lumped together due to their relative lack of fossils.
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www.watersheds.org/earth/gtime01.htm
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