Rocks that formed some 3.7 billion years ago in the early Archean have given us the earliest ... a region known as the Supracrustal Belt has a special geology: it sits upon a thick layer of ...

The Journal of Geology, Vol. 33, No. 5 (Jul. - Aug., 1925), pp ... and occupies an area of about 1,000 square miles. The granite intrudes Archean and Lower-Middle Huronian rocks and is overlain ...

As a geology undergraduate student, I was taught about the importance of a type of rock deposit known as the banded iron formation in recording the planet's history. Banded iron formations were ...

A Southwest Research Institute-led team updated planetary bombardment models with the latest geologic information and then applied those models to understand how impacts may have affected oxygen l ...

To date, such features are not observed in Archean rocks, which suggests (but does ... on ocean chemistry and input fluxes. Chemical Geology 217, 113–126 (2005). Lowe, D. R.

(1987) Development of the Archean crust in the Medina ... Wyoming. Journal of Geology, 97, 331-342. Grant, J. A., and Frost, B. R. (1990) Contact metamorphism and partial melting of pelitic rocks in ...

As a geology undergraduate student, I was taught about the importance of a type of rock deposit known as the ... Banded iron formations were deposited in the Archean and Paleoproterozoic eons ...