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Earth most likely resembled a giant snowball during which period? A. Mesozoic B. Ordovician C. Precambrian D. Pennsylvanian
The earliest hypothesized ice age is believed to have occurred around 2.7 to 2.3 billion (109) years ago during the early Proterozoic Age. The earliest well-documented ice age, and probably the most severe of the last 1 billion years, [ occurred from 800 to 600 million years ago (the Cryogenian period) and it has been suggested that it produced a Snowball Earth in which permanent sea ice
extended to or very near the equator. It has been suggested that the end of this ice age was responsible for the subsequent Cambrian Explosion, though this theory is recent and controversial.A minor ice age occurred from 460 to 430 million years ago, during the Late Ordovician Period. ]
Expert answered|Maribeth|Points 110|
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Added 22 days ago|2/7/2015 9:21:42 AM
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Confirmed by jeifunk [2/7/2015 9:26:53 AM]
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