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terminal moraine |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.07 sec. |
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terminal moraine [′tər·mən·əl mə′rān] (geology) An end moraine that extends as an arcuate or crescentic ridge across a glacial valley; marks the farthest advance of a glacier. Also known as marginal moraine. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Basically the position of the ice dam is recognized from two observations: the presence of one or more major terminal moraines deposited when there was a hiatus during the period of ice recession, and the disappearance (or weakening) of beaches as the ice barrier is approached (so that beaches are found only on the sides of the basin where the ice barrier was absent). In the eastern half of the state, the main areas of increased suitability were along the glacial terminal moraines, which is where the positive sites in the Kettle Moraine State Forest were located. Phillips dated terminal moraines, which are large ridges of rocks and debris dumped at the edge of a glacier as it melts and retreats. |
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