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Halleberg
Halleberg is a table mountain by lake Vänern in Vänersborg Municipality, Västergötland, Sweden. Halleberg, part of which protrudes into Lake Vänern is separated in the south by about 500 meters wide valley from the adjacent Hunneberg (although this is a table mountain). The northern part of Halleberg called ''Hallesnipen''. ==Geology== Hallberg has an average height of about 90 meters above lake Vänern, or 134 feet above sea level; the highest point is 155 meters above sea level. Halleberg consists of Cambrian, Ordovician and Permian rocks. The Palaeozoic rocks are deposited directly on the crystalline peneplain bedrock, which in this range consists of göta granite. The Cambrian sedimentary rocks are sandstone and alum shale. The sandstone layer is on average 24 meters thick. Above this there is then a 0.30 meter thick slate which in turn covered by about 24 meters of alum shale. The Ordovician is represented by a calcareous slate. During the Permian it was pushed into diabase which lays as a protective cover and thus protect the mountain from erosion. The diabase on Västgötabergen known locally for staircases.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Halleberg」の詳細全文を読む
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