From Simple English Wikipedia, the free encyclopedia
The Balanced Rock "balances" in Garden of the Gods in Colorado Springs, Colorado, United States.

In geology, a boulder is a large piece of rock fragment that is larger than 25.6cm or roughly 10.1 inches in diameter or with a size value less than -8 on the φ particle size scale with no upper size limit.

References[change | change source]

  1. Webster’s New International Dictionary of the English Language. Springfield, Massachusetts: G. & C. Merriam Company. 1913.
  2. "Boulder". Retrieved 24 August 2013.

Citations[change | change source]

  1. "Boulder". Collins English Dictionary.

Other websites[change | change source]

  • Media related to Boulders at Wikimedia Commons