It's jutting up from one of seven lobes of fresh volcanic rock that have been pushing their way through the surface of the crater since October 2004. The fin-shaped mass is about 300 feet tall and ...

Crater of Diamonds State Park in Arkansas is the only state park in the U.S. where you can dig for diamonds and keep them. You'll also be able to find gems like quartz, agate, garnet, and jasper ...

SEATTLE - It's mostly clear today at Mount St. Helens. On the first day of the reopening of the Johnston Ridge Observatory, visitors can look into the crater where a 300-foot fin-shaped slab ...

Scientists are rethinking their theories about the Chesapeake Bay impact crater after they drilled deeper into it than ever before and unexpectedly hit a huge slab of granite. Crews penetrated ...

A hulking slab of rock is rapidly growing in Mount St. Helens' crater. A giant slab of rock juts out of the Mount St. Helens crater on Thursday in this image from the U.S. Geological Survey.

In this photo provided by the U.S. Geological Survey, a helicopter flies past a new "slab" rock growth in the crater of Mount St. Helens last week. The skies were clear Friday, and volcano ...

Crater of Diamonds State Park in Arkansas is the only state park in the U.S. where you can dig for diamonds and keep them. You'll also be able to find gems like quartz, agate, garnet, and jasper ...