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overthrust

   Also found in: Encyclopedia 0.01 sec.
overthrust [ˈəʊvəˌθrʌst]
n
(Earth Sciences / Geological Science) Geology a reverse fault in which the rocks on the upper surface of a fault plane have moved over the rocks on the lower surface Compare underthrust


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The Glarus Overthrust straddles three cantons and is effectively upside-down--that is to say that scientists were stunned to discover that its top layers are 225 million years older than its bottom layers.
I see very little hope for the Rocky Mountain overthrust belt due to problems with access.
Cambrian- through Silurian-age limestone, siltstone, sandstone and shale are overthrust by Ordovician upper-plate siliceous rocks.
 
 
 
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