More than 3 billion years ago, Mars intermittently had liquid water on its surface. After the planet lost much of its ...

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 ...

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) ...

THE direction of remanent magnetization of igneous rocks has recently been examined in detail 1 in order to investigate the secular variation in the geomagnetic field, and its relation to the ...