Topic
Free account · your comment posts right after signup
Not who you're looking for? Others named boulder: city in and county seat of Boulder County, Colorado, United · town in Garfield County, Utah, United States · town in Montana, United States · census-designated place in Sublette County, Wyoming
In geology, a boulder (or rarely bowlder) is a rock fragment with size greater than in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive.
Read the full article →