GEOLOGY

Detailed explanation-1: -1. a smooth rounded mass of rock that has a diameter greater than 25cm and that has been shaped by erosion and transported by ice or water from its original position. 2. geology. a rock fragment with a diameter greater than 256 mm and thus bigger than a cobble.

Detailed explanation-2: -What Is a Boulder? A boulder is defined as any rock larger than 16” in diameter. They are available in two basic shapes: round and angular. Round boulders have smooth edges and curves. They are water-washed or river-run surface stones of granite and sandstone, worn over the eons by wind, sand, and rain.

Detailed explanation-3: -: a large detached and rounded or worn mass of rock.

Detailed explanation-4: -A boulder is a rock-a big one. Scientists often think of a boulder in more technical terms than we do. They use the word to describe not just a big rock, but a rock that some natural force-a river, a glacier or the like-has moved from its original location to its present one.