Large masses of plutonic rock—such, for example, as the granites of Devon and Cornwall—can be proved by field evidence to fill spaces that must formerly have been occupied by other rocks.

Among the new features are chapters dealing with the consolidation of magmas; the classification of igneous rocks; changes in composition subsequent to consolidation (including pneu-matolytic ...

In this area, mafic igneous rocks are predominantly intrusion into Jurassic strata, occurring as vein-like bodies. This study presents zircon U-Pb age determinations and whole-rock geochemical ...

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Diorite is a course-grained igneous rock that forms when magma rich in silica cools slowly deep within the Earth's crust. How would a geologist figure out how it formed using rock characteristics?