Elkhorn Mountains Volcanic Breccia | Montana Pyroclastic Rock
Collected near Winston, Montana, this striking volcanic breccia tells the story of explosive eruptions that once rocked the Elkhorn Mountains. The angular rock fragments embedded in a dark volcanic matrix are classic signs of pyroclastic flow deposits—evidence of a fiery past. With one face cut and smoothed to reveal its complex internal texture, this piece makes a perfect addition to any geologic collection or educational display.
Origin: Elkhorn Mountains, Montana
Rock Type: Volcanic breccia
Size: Approx. 5.5" x 2.5" x 1.5"