Prehistoric Scratchpad

Boundary of the Mesoproterozoic and Neoproterozoic. Life was single cellular, but had recently developed sexual reproduction. The ancestors of plants, animals, and fungi had diverged.

1 Billion Years Ago Web Pages[edit | edit source]

Sites[edit | edit source]



  • Interstate Park - Park on the St. Croix River between Minnesota and Wisconsin. One of the few areas rock formed during the volcanism of the Midcontinent Rift System are exposed. These rocks straddle the St. Croix River Valley, formed when the glaciers of the last ice age melted.

Near East

Australia & Oceana


The Moon

  • Oceanus Procellarum - Also known as the "Ocean of Storms". The largest of the cooled magma "seas" on the Moon, and one of the youngest. Known as the "moon rabbit" in Japan and a significant part of the Man on the Moon in the west.

Related Links[edit | edit source]

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