Looking at an igneous rock, such as the granite along Stockton Hill Road at milepost 10, you’ll see a variety of minerals.

Snowflake obsidian is a form of volcanic glass that features white or grayish “snowflake” shapes made of embedded ...

All Earth Science students need to understand the origins, environments, and basic processes that produce igneous and metamorphic rocks. This concise introductory textbook provides students with the ...

Researchers analyzed radioisotopes in layers of fossilized volcanic ash. Decay of uranium to lead within tiny crystals ...

They look a bit like geodes, but they’re not exactly geodes. There are three types of rock: igneous, metamorphic, and ...

Building upon the award-winning second edition, this comprehensive textbook provides a fundamental understanding of the formative processes of igneous and metamorphic rocks. Encouraging a deeper ...

For geologists, a continent is a large area of thick continental crust composed of granite or similar igneous rocks, forming the continental base, in combination with metamorphic rocks ...

With our ideas of volcanoes we always associate the grand and the terrible ; and a volcanic eruption—a huge piece of artillery, with a mouth perhaps miles in circumference, shooting up rocks and ...

ONLY detailed sampling of early weathering stages combined with suitable analytical techniques can reveal the presence of gibbsite as a primary weathering product in certain weathering crusts of ...