Smithsonian researchers trekked to a remote site in northern Canada to collect four-billion-year-old rock samples that could ...

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

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

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

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

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.

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 ...