Yooperlites are a variety of sodalite-rich syenite found in the Upper Peninsula of Michigan.

Metamorphic rocks are formed when conditions underground, such as fluid, strain, heat, and/or pressure cause rocks to change or metamorphose. History Detectives Tips ...

Microbes have been discovered alive inside 2-billion-year-old rock, offering a rare window into Earth’s deep past. Found in the Bushveld Igneous Complex (BIC) of South Africa, these microscopic ...

This is a beginner's guide to identifying UK rock types. The guide has two main sections: background information on the structure and forces affecting the Earth in relation to rock formation; a more ...

Sodalite forms in igneous rocks that crystallized from sodium-rich, silica-poor magmas. That’s how it got its name—soda + lithos, or “sodium stone," according to Rock Your World gem & art ...