Documents Precambrian Earth and Life History. 88% of geologic time 88% of geologic time Precambrian Time Span....

Precambrian Earth and Life History 88% of geologic time Precambrian Time Span The Precambrian lasted for more than 4 billion years! The term Precambrian is informal but widely…

Documents Chapter 8 Precambrian Earth and Life History—The Hadean and Archean -platforms and shield areas=.....

Chapter 8 Precambrian Earth and Life HistoryâThe Hadean and Archean -platforms and shield areas= together make craton -early planet: volcanic, toxic gases (CO2), -Hadean…

Documents Chapter 8 Precambrian Earth and Life History—The Hadean and Archean.

Chapter 8 Precambrian Earth and Life HistoryâThe Hadean and Archean Archean Rocks The Teton Range is largely Archean gneiss, schist, and granite Younger rocks are also present…