THE closing years of the nineteenth century witnessed a revival of interest in the petrology of gneous rocks, which must be regarded as marking an important stage in the development of that subject.

This 1930s educational film explores the natural landscapes, geological formations, and agricultural practices of the time. It features scenes of farmers tilling soil, majestic mountain roads, ...

DISCUSSION ON THE PETROLOGY OF IGNEOUS AND METAMORPHIC ROCKS FROM THE OCEAN FLOOR ORGANIZED BY EDWARD BULLARD JR CANN AND DH MATTHEWS ...

HOWEVER prophetic may have been the far-seeing premonitions of men in advance of their age in the dim past, and however invaluable may have been the additions made to the superstructure since, it can ...