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SlideshowReport

Earth’s Oldest Preserved Rocks – 3.8 Billion Years Old, Greenland

Description
Precambrian History

Precambrian – divided into the
Archean eon
Proterozoic eon
Spans almost 90 percent of Earth’s history

Much of Earth’s stable continental crust was created during the Precambrian
Partial melting of the mantle formed volcanic island arcs and ocean plateaus
These crustal fragments collided and accreted to form larger crustal provinces
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