Snowball Earth: freezing and thawing

Exploration · Cryogenian

Snowball Earth: freezing and thawing

Starting point · 635 Ma

An imagined frozen Cryogenian coast, not a measured reconstruction of ice extent, thickness or exact terrain.

Cryogenian rocks record glaciation reaching low latitudes. The Sturtian and Marinoan were separate glaciations. The conceptual diagram explains freezing and thawing; the background globe models continental positions around 635 Ma, not ice extent.