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

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

"Early exploration of the Antarctic continent revealed a surprising result." Scientists make stunning discovery hidden along ...

The Transantarctic Mountains, stretching an impressive 2,175 miles (3,500 kilometers), lie quietly beneath Antarctica’s icy ...

Researchers reveal a dynamic geologic past for Antarctica’s Transantarctic Mountains, uncovering ancient mountain-building ...

The findings may signify a much more dynamic Antarctic landscape history than previously recognized, including added support ...

The scientists dated the rocks using zircon, a mineral in gneiss, the GSA said. "Dating zircon grains using ... techniques is now celebrated as the optimal method for determining when igneous ...

Table 1. Average P2O5 contents of phosphate ore and concentrates from igneous and sedimentary phosphate rocks from various countries around the world. To view an enhanced version of this graphic ...

Instead, researchers are now exploring the possibility that Skull Hill could be a chunk of igneous rock, formed from cooling magma and potentially ejected by an impact event or uncovered by erosion.