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.

Scientists have demonstrated that a new geochemical archive -- 182-Tungsten in banded iron formations -- can be used to simultaneously trace both the evolution of the Earth's mantle and continents ...

IMAGE: Caption: Carbonate layers hold carbon isotope evidence of the late Precambrian greening of the Earth. These are located in the Old Dad Mountains in California. Credit: L.P. Knauth, Arizona ...

The Precambrian eon is vast, almost unimaginably so. In fact, before some fossil discoveries were made late in the 20th century, it was considered unknowable -- evolution's dark ages. The Precambrian ...

The Great Unconformity is a major gap in Earth's geologic record. The missing layer between Precambrian and Cambrian rocks ...

3. 25 Facts About Geologic Time That Made Our Brains Hurt 4. How Do We Know? A Glimpse into Geologic Sleuthing 5. Our ...