Microbes have been discovered alive inside 2-billion-year-old rock, offering a rare window into Earth’s deep past. Found in ...

Our planet has been asteroid-smashed, melted and eroded, enough that most of its original armor has been long buried. Except ...

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

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 ...

This action is believed to account directly or indirectly for many varieties of igneous rock. Igneous Rocks and their Origin. By Prof. R. A. Daly. Pp. xxii + 563.

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 ...

Igneous rock is formed by the cooling of molten rock, either at the surface (lava), or underground (as granite or other similar rocks).The heat of molten rock usually incinerates organisms rather than ...

In a recent study, geologists say Michigan is home to the oldest known rock in the nation. Watersmeet gneiss is found in Michigan's Upper Peninsula. Minnesota's Morton gneiss previously held the ...

Igneous Rock Phosphate: ore grades, concentrates and mining operations around the world. Drs. Sandeep Banerjee, Peir K. Pufahl, Sarah Dare Department of Geological Sciences and Engineering, Queen ...

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 ...