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Boulder | |
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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.
Koggenland | |
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State | |
Country | |
Capital | |
Population | 0 |
Koggenland is a municipality in North Holland province and the region of West-Frisia of the Netherlands. It came into existence on 1 January 2007 upon the merger of the two former municipalities of Obdam and Wester-Koggenland.