Search results
Results from the WOW.Com Content Network
Moraines can be classified either by origin, location with respect to a glacier or former glacier, or by shape. [13] The first approach is suitable for moraines associated with contemporary glaciers—but more difficult to apply to old moraines, which are defined by their particular morphology, since their origin is debated. Some moraine types ...
Terminal moraines are one of the most prominent types of moraines in the Arctic. One notable terminal moraine is Trollgarden in Norway , once thought to be magically constructed by trolls . In North America, the Outer Lands is a name given to the terminal moraine archipelago of the northeastern region of the United States ( Cape Cod , Martha's ...
Moraines may be used to mark the extent of a glaciated region and the successive patterns of advance and retreat during glaciation. [3] The name and specific characteristics of a moraine are dependent upon its location relative to the glacial body and the processes that deposited the relevant glacial till. [ 7 ]
The Lake Erie basin has two moraines of the same age as the Valparaiso Moraine, the Mississinewa Moraine and the Union Moraine. These moraines formed from the Lake Erie Lobe of the continental glacier. In Michigan the Kalamazoo Moraine is of the same time period. It is the result of the Saginaw lobe of the Laurentian glacier. [9]
One theory proposes that as the glacier melts it leaves behind an accumulation of rock debris in the form of annual recessional moraines. These annual glacial advances and recessions cause parallel ridges to form a few metres apart. Because the accumulation of debris is annual, the moraines do not get very large and stand only a few metres high.
1.5 Moraines of the Great Plains of the United States. 1.6 Moraines of the U.S. and Canadian Rocky Mountains. 2 Europe. 3 Antarctica. Toggle Antarctica subsection.
Drift is often subdivided into unstratified (unsorted) drift (glacial till) that forms moraines and stratified drift (glaciolacustrine and fluvioglacial sediments) that accumulates as stratified and sorted sediments in the form of outwash plains, eskers, kames, varves, and so forth. The term drift clay is a synonym for boulder clay. Both are ...
Push moraines are limited in size by the advance of a glacier front and its tendency to shear over the top of any ridge large enough to resist the movement of ice. Pushed moraines generally occur in low, flat plains at higher latitudes and were formed during the glacial stages of the Quaternary ice age. They can be up to 100 km long and several ...