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Chapters: Canyon, Bode Gorge, Slot Canyon, Grand Canyon, Pongo, Steephead Valley, Box Canyon, Urban Canyon. Source: Wikipedia. Pages: 36. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: The Bode Gorge (German: ) is the name given to the valley of the Warme and Kalte Bode rivers in the Harz mountains of central Germany. In a narrower sense the Bode Gorge is also used to describe just the 10 km long, ravine-like section of the Bode valley between Treseburg and Thale. At the Bode Gorge, the River Bode, which rises on the Brocken, the highest mountain in the Harz, has cut deeply into the hard Ramberg granite rock. The ravine is about 140 m deep at Treseburg and some 280 m deep at Thale where it breaks out into the Harz Foreland. The Bode Gorge was designated a nature reserve as early as 5 March 1937, its boundaries being subsequently expanded. With an area of, currently 473.78 hectares (1, 170.7 acres), it is one of the largest nature reserves in Saxony-Anhalt. Fresh piece of Ramberg granite from the Bode GorgeApart from the intrusions of Ramberg granite, which rose to the surface and solidified 300 million years ago in the Upper Carboniferous period, and their associated veins of quartz, the ravine of the Bode also cuts through hornfels and Knotenschiefer, as well as argillite and grauwacke with quartz elements and diabase veins from the Devonian period, 400 to 370 million years ago. Ramberg granite predominantly forms the front of the ravine and characterises its highest rocks. It appears light-coloured due to the high proportion of white felspar. The quartz lends it a grey shade. The proportion of black mica (biotite) is low and carries no weight in terms of colouring. The light-coloured granite stands out from the dark to black coloured rocks of hornfels and argillite. As a result, the fr...More: http://booksllc.net/?id=25645662
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Canyons and Gorges: Canyon, Bode Gorge, Slot Canyon, Grand Canyon, Pongo, Steephead Valley, Box Canyon, Urban Canyon
Book reviews » Canyons and Gorges: Canyon, Bode Gorge, Slot Canyon, Grand Canyon, Pongo, Steephead Valley, Box Canyon, Urban Canyon
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