DILLON, Mont. — Molten granite formed the Pioneer Mountain Range in southwest Montana about 72-million years ago. As the granite cooled, water carried quartz and other minerals through the rocks and ...

As summer days are in full swing, Oklahomans are taking part in adventures across the state. For all you that nerd out over that cool rock you found, and we say nerd out in the most loving way ...

Susan Valencia has always been fascinated by rocks. She recalls camping with her family as a kid and almost constantly digging to see what remarkable treasures she could find hidden within the earth.

Thundereggs look like regular rocks from the outside, but contain intricate and colorful mineral patterns inside — often made ...

Everyone switched off their headlamps and there we stood together in total darkness, inside the San Gabriel Mountains. Yes, inside. I had joined a local caving group in an attempt to understand more ...