The early earth / editor, D.R. Nelson. Earth's formation and first billion years / D.R. Nelson. The early Precambrian stratigraphic record of large extraterrestrial impacts / B.M. Simonson, G.R.
The Great Unconformity is a major gap in Earth's geologic record. The missing layer between Precambrian and Cambrian rocks ...
Morning Overview on MSN
Geologists uncovered Earth’s oldest water, but dared not drink it
Researchers working in a Canadian mine have sampled water that has been sealed inside Precambrian rock fractures for up to 2.64 billion years, making it the oldest known free-flowing water on Earth.
Ch. 1. The Dynamic and Evolving Earth -- ch. 2. Earth Materials: Minerals and Rocks -- ch. 3. Plate Tectonics: A Unifying Theory -- ch. 4. Geologic Time: Concepts and ...
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