Scientists believed that Venus' crust was continuously thickening, in the absence of mechanisms like plate tectonics. However ...

Primary minerals form at elevated temperatures from cooling magma during the original solidification of rock or during metamorphism, and they are usually derived from igneous and metamorphic rocks ...

A weathered sign in the Minnesota River Valley proudly proclaims: “World’s Oldest Rock.” Erected in 1975, it marks a 3.8-billion-year-old gneiss — or so scientists thought.

Spectroscopic analysis of this graphitic carbon suggests that it was formed from metamorphic fluids ... of the graphite correlates with the rocks' metamorphism, indicating that metamorphism ...

Areas of expertise My research is in the field of very low-grade metamorphism, and aims to establish if ... based on the evolution of low-grade metamorphic rocks.

Geologists recently dated the age of Watersmeet gneiss, a type of rock in the Upper Peninsula, as the oldest in the U.S. Here's what to know.

"My research is directed towards a better understanding of how variations in metamorphic grade in space and time ... computer models of the relationships between heat, tectonics, and metamorphism in ...