Test your knowledge of Yosemite National Park with this quiz! Answer questions about its famous landmarks, history, wildlife, ...

Rocks for a local rock garden are best chosen from those that are naturally occurring in the area,” writes columnist Tom ...

Explore where Acadia National Park is. Learn about its stunning map, unique geology shaped by glaciers, rich history, and key ...

Learn about how volcanoes are formed and the ways they erupt Chiara Maria Petrone, Roberto Scandone, and Alex Whittaker On February 20, 1943, Dionisio Pulido and his family were working in their ...

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 ...

A 2.35-billion-year-old Moon rock that fell to Earth in Africa is rewriting what we know about lunar volcanism. This rare ...

Rocks on Iceland beaches confirm the Late Antique Little Ice Age, caused by volcanic eruptions, precipitated the fall of the Roman Empire.

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?