Glacial erratic

Indian Rock in the Village of Montebello, New York

Doane Rock, at Cape Cod National Seashore

A glacial erratic is a piece of rock that differs from the size and type of rock native to the area in which it rests. "Erratics" take their name from the Latin word errare, and are carried by glacial ice, often over distances of hundreds of kilometres. Erratics can range in size from pebbles to large boulders such as Big Rock (15,000 tonnes or 17,000 short tons) in Alberta.

单词	Erratic boulder
释义	Erratic boulder 原声例句优山美地 A few erratic boulders, nicely poised on its crown, tell an interesting story. 一些不稳定的巨石，在它的王冠上很好地平衡，讲述了一个有趣的故事。英语百科 Glacial erratic A glacial erratic is a piece of rock that differs from the size and type of rock native to the area in which it rests. "Erratics" take their name from the Latin word errare, and are carried by glacial ice, often over distances of hundreds of kilometres. Erratics can range in size from pebbles to large boulders such as Big Rock (15,000 tonnes or 17,000 short tons) in Alberta.
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Erratic boulder

Glacial erratic