Identification and classification of igneous and metamorphic rocks. Emphasis is on thin section identification and use of rock textures and compositions as guides to petrogenesis.

Dredged rock material in the Collection dates from the early part of the 1900s. The Collection has slowly evolved from individual bags of rock to thousands of wooden storage boxes full of rock, housed ...

A DISCUSSION on the origin of igneous rocks was held in Section C (Geology) of the British Association at York on September 7. The discussion was opened by Prof. Arthur Holmes, who sketched out a ...