Glacial erratic

Glacial erratic image

A glacial erratic is glacially deposited rock differing from the size and type of rock native to the area in which it rests. "Erratics" take their name from the Latin word errare (to wander), 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 (16,500 tonnes or 18,200 short tons) in Alberta. Geologists identify erratics by studying the rocks surrounding the position of the erratic and the composition of the erratic itself. Erratics are significant because: They can be transported by glaciers, and they are thereby one of a series of indicators which mark the path of prehistoric glacier movement.

Big Rock (glacial erratic)
4 months ago

Big Rock (glacial erratic) ... of Sec. 21, Township 20, Range 1, West 5th Meridian. Big Rock is a glacial erratic that is part of a 930 km (580 mi) long, narrow (1.00 to 22.05 km (0...

Ice age
2 months ago

Ice age ... scouring and scratching, glacial moraines, drumlins, valley cutting, and the deposition of till or tillites and glacial erratics. Successive glaciations...

Glacial erratic boulders of Estonia
4 months ago

Glacial erratic boulders of Estonia ... Glacial erratic boulders of Estonia are large boulders of rock which have been formed and moved into Estonia by glacial action during previous ice ages...

Bluestone
5 months ago

Bluestone ... 250 kilometres (150 miles) away in Wales, either through glaciation (glacial erratic theory) or through humans organizing their transportation. A summary...

Last Glacial Maximum
5 months ago

Last Glacial Maximum ... The Last Glacial Maximum (LGM), also referred to as the Late Glacial Maximum, was the most recent time during the Last Glacial Period that ice sheets...

Glacial erratic boulders of King County, Washington
5 months ago

Glacial erratic boulders of King County, Washington ... Glacial erratic boulders of King County are large glacial erratic boulders of rock which were moved into King County, Washington by glacial action during...

Glacial erratic boulders of the Puget Sound region
5 months ago

Glacial erratic boulders of the Puget Sound region ... Many glacial erratic boulders (often simply called glacial erratics) can be found in the Puget Sound region as far south as the Yelm area where the Puget...

Glacier
6 months ago

Glacier ... material upon which they are found. Patterns of glacial erratics hint at past glacial motions. Glacial moraines are formed by the deposition of material...

Last Glacial Period
4 months ago

Last Glacial Period ... The Last Glacial Period (LGP) occurred from the end of the Eemian to the end of the Younger Dryas, encompassing the period c. 115,000 – c. 11,700 years...

Erratic
4 months ago

Erratic ... Erratic may refer to: Erratic, a project of music artist Jan Robbe Glacial erratic, a piece of rock that differs from the size and type of rock native...

Glacial erratics on and around Rügen
4 months ago
Balancing rock
4 months ago
Pleistocene
5 months ago
Der Alte Schwede
4 months ago
Post-glacial rebound
5 months ago
Erosion
5 months ago
Glacial erratic boulders of Island County, Washington
4 months ago
Omarolluk
4 months ago
Glacial erratic boulders of Snohomish County, Washington
4 months ago
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