The first rocks on Earth were igneous rocks. Igneous rocks are formed by the cooling and hardening of molten material called magma. The word igneous comes from the Latin word ignis, meaning fire. There are two types of igneous rocks: intrusive and...

Igneous rocks (etymology from Latin ignis, fire) are rocks formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks....

The igneous rocks of Greece: The anatomy of an orogen by Georgia Pe-Piper and David J.W. Piper Gebruder Borntraeger, Berlin, 2002 98 Euro, hardcover ISBN 3-443-11030-4 Evident in the title, this new book by our close colleagues here in the Maritimes...

Abstract The photon linear attenuation coefficients ([mu]) have been calculated for four different igneous rocks which are widely used in industrial field using XCOM computer code and the results were compared with measured values. The relation between linear attenuation coefficients and some...

It's a silly old expression, but Professor Eric Leonard says it's true: The best geologist is the one who's seen the most rocks.Which is why, on a crisp fall morning, Leonard was driving a van full of sleeping bags and sleepy-eyed Colorado College freshmen into...