Boulder
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]- Webster’s New International Dictionary of the English Language. Springfield, Massachusetts: G. & C. Merriam Company. 1913.
- "Boulder". Dictionary.com. Retrieved 24 August 2013.
Citations
[change | change source]- "Boulder". Collins English Dictionary.
Other websites
[change | change source]- Media related to Boulders at Wikimedia Commons
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