This is a preview. Log in through your library . Abstract Twelve of the more recent proposals for the classification of igneous rocks are discussed with the intention of noting points of agreement and ...

During the past two-and-a-half years of traversing the central part of Gusev Crater, NASA’s Mars Exploration Rover Spirit has analyzed the brushed and ground-into surfaces of multiple rocks using the ...

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.

Igneous rocks close igneous rockIgneous rocks are those which have been formed by the cooling and solidification of molten rock (magma) from underneath the earth’s crust. are formed by magma from the ...

WITH the collaboration of Dr. A. K. Wells, this well-known text-book has been revised and extended until now it is virtually a new book. Among the new features are chapters dealing with the ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...