Boulder

This article is about the large rocks known as boulders. There is also a city called Boulder, Colorado and other uses of the term boulder.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

In geology, a boulder is a large rock, greater than 256 mm (10 in) in diameter (see grain size for standards in use). While a boulder may be small enough to move or roll manually, others are extremely massive. Some famous rock formations involve giant boulders exposed by erosion, for example the Devil's Marbles in Australia's Northern Territory.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

In common usage, the term boulder is most often used to refer to large boulders, especially ones too large for a person to move. Outside of the field of geology, smaller boulders are usually just called rocks or stones.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Some people choose to climb larger-sized boulders for recreational purposes or as a method of training for mountaineering and free climbs. This practice is known as bouldering.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Boulder, Colorado: Boulder (, MST) is a city located in Boulder County, Colorado, USA. As of the 2000 census, the city had a total population of 94,673. It is home to the University of Colorado at Boulder, the largest university in Colorado. It has an elevation of 5,430 feet and is 50 km (35 miles) nor...

Geology: Geology (from Greek γη- (ge-, "the earth") and λογος (logos, "word", "reason")) is the science and study of the Earth, its composition, structure, physical properties, history, and the processes that shape it. It is one of the Earth sciences....

Rock: Rock may refer to:...

Boulder related Images and Photos (experimental)

Flat Irons Boulder Colorado	Lightning Storm Boulder	Utah Boulder View Towards Capitol Reef National Park from Rt 12 Winter USA	View of Boulder Dam 726 Ft. High with Lake Mead 115 Miles Long Stretching Out in the Background
Hector Trojan Hero Heaves a Huge Boulder at the Greek Camp	Mule Deer Mother and Fawn in Snow Boulder Colorado United States of America North America	Rocky Mountains Thirty Miles Outside of Boulder Colorado USA	Winterscene of the Flatirons in Boulder Colorado
Winterscene of the Flatirons in Boulder Colorado