The most common rock-forming minerals include quartz, feldspar, mica, amphibole, olivine, and calcite. Some rocks are predominantly composed of just one mineral. For example, limestone is a ...

quartz and amphibole." Igneous rocks may be subjected to high heat and pressure, or exposed to fluids that alter their mineral composition. Once their mineral composition changes, the rocks are ...

Yooperlites can be found as loose pebbles and cobbles along many Lake Superior beaches and even in some inland gravel pits.

Researchers led by Colin Jackson, a graduate student in geological sciences, have found noble gases to be highly soluble in amphibole, a mineral commonly found in oceanic crust. "We found ...

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

The hard, magnetic teeth of a leathery red-brown mollusk nicknamed “the wandering meatloaf” possess a rare mineral previously seen only in rocks. The mineral may help the mollusk — the giant ...

For some, collecting rocks and gemstones is a childhood memory. Organizers of the Michiana Gem & Mineral Show are hoping to inspire a new generation of collectors, one rock at a time. If you ask ...

Throughout the year, the best time to seek Yooperlites and other stones is after a storm, when waves have disrupt and uncover new rocks. Sodalite is a deep blue to blue-violet mineral best known ...