Snowball Earth
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The Snowball Earth is a geohistorical hypothesis proposing that during one or more of Earth's icehouse climates, the planet's surface was nearly entirely frozen, with little or no liquid water exposed
Artist's rendition of a fully frozen Snowball Earth with no remaining liquid surface water
Diamictite of the Neoproterozoic Pocatello Formation, a "snowball Earth"-type deposit
Elatina Fm diamictite below Ediacaran GSSP site in the Flinders Ranges NP, South Australia. A$1 coin is for scale.
2.1 billion-year-old rock with black-band ironstone
Proterozoic
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The Proterozoic is the third of the four geologic eons of Earth's history, spanning the time interval from 2500 to 538.8 Ma, and is the longest eon of Earth's geologic time scale. It is preceded by th
Snowball Earth
…The term "snowball Earth" was coined by Joseph Kirschvink in a short paper published in 1992 within a lengthy volume concerning the biology of the Proterozoic eon. The major contributions from this work were: (1) the recognition that the presence of banded iron formations is consistent with such a global…
Rodinia, about 900 Ma