Boulder | |
---|---|
State | Montana |
Country | United States of America |
Capital | |
Population | 1445 |
In geology, a boulder is a rock fragment with size greater than 256 millimetres (10.1 in) 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.
In common usage, a boulder is too large for a person to move. Smaller boulders are usually just called rocks (American English) or stones (In British English a rock is larger than a boulder). The word boulder is short for boulder stone, from Middle English bulderston or Swedish bullersten.In places covered by ice sheets during Ice Ages, such as Scandinavia, northern North America, and Siberia, glacial erratics are common. Erratics are boulders picked up by ice sheets during their advance, and deposited when they melt.
Dundee ( (listen); Scots: Dundee; Scottish Gaelic: Dùn Dè or Dùn Dèagh [t̪un ˈtʲeː]) is...
Nashville is the capital and most populous city of the U.S. state of Tennessee. The city is the...
Dallas Center is a city in Dallas County, Iowa, United States. The population was 1,623 during...