Igneous intrusions are a type of rock feature. They form when molten rock cools below the surface of the Earth. Join Isla and Connor as they explore igneous rock landscape features at Traprain Law ...

X” really does mark a spot in Sybille Canyon along Wyoming Highway 34, but it doesn’t mark the site of buried treasure. It’s ...

Pumice is an example of extrusive igneous rock. The word extrusive means that the magma was forced onto the earth's surface and cooled in a matter of hours. Granite is an example of intrusive ...

The Yellowstone region's Beartooth Mountains feature some of the most ancient rocks in North America — as old as 3.96 billion ...

Yohey Suzuki, Lead Author and Associate Professor, Graduate School of Science, University of Tokyo The rock sample was taken from the Bushveld Igneous Complex (BIC), a rocky intrusion in ...

The Journal of Geology, Vol. 23, No. 8, Supplement: The Later Stages of the Evolution of the Igneous Rocks (Nov. - Dec., 1915), pp. 1-91 (91 pages) ...

A batholith is a large mass of intrusive igneous rock that made its way to the surface. While relatively small by world standards, the Boulder Batholith, and by extension the Boulder Mountains ...