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词汇 Push moraine
分类 英语词汇 英语翻译词典
释义

Push moraine

英语百科

Push moraine

The Lüneburg Heath seen from the Wilseder Berg in northern Germany. The Lüneburg Heath consists of pushed moraines made from Neogene sand deposits. These form nutrient-poor soils and are generally shrublands covered in heaths.

A push moraine or pushed moraine is in geomorphology a moraine (a landform formed by glacial processes) that forms when the terminus advance of a lowland glacier pushes unstratified glacial sediment into a pile or linear ridge in front of it. A push moraine is identified by its ability to push sediment upwards from its original horizontal position. 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 hundreds of metres in height.

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