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In physical geography and geology, a horst is a raised fault block bounded by normal faults. [1] Horsts are typically found together with grabens . While a horst is lifted or remains stationary, the grabens on either side subside . [ 2 ]
A horst is a section of crust that has been lifted relative to the blocks on either side, which is a result of its bounding faults dipping away from each other. [2] Horsts can form features such as plateaus, mountain ranges or ridges on either side of the valleys.
Another example is the Rila–Rhodope massif in Bulgaria, including the well defined horsts of Belasitsa (linear horst), Rila mountain (vaulted domed shaped horst) and Pirin mountain—a horst forming a massive anticline situated between the complex graben valleys of the Struma and Mesta rivers. [20] [21] [22]
Lifted type block mountains have two steep sides exposing both sides scarps, leading to the horst and graben terrain seen in various parts of Europe including the Upper Rhine valley, a graben between two horsts – the Vosges mountains (in France) and the Black Forest (in Germany), and also the Rila – Rhodope Massif in Bulgaria, Southeast ...
Fault scarps are exposed on the horst block and expose the footwall of the normal fault. This is a type of block faulting known as grabens and horsts. This basin and range topography is symmetrical having equal slopes on both sides of the valleys and mountain ranges. Timelapse of tilted block faulting
Rwenzori in larger geographical context Margherita Peak on Mount Stanley is the highest point in the range.. The mountains formed about three million years ago in the late Pliocene epoch and are the result of an uplifted block of crystalline rocks including gneiss, amphibolite, granite and quartzite.
Basin and Range Province of southwestern North America is an example of multiple horst/graben structures, including Death Valley, with Salt Lake Valley being the easternmost and Owens Valley being the westernmost. Lake George Basin, New York, U.S. Lake Tahoe Basin, California and Nevada, U.S. Republic Graben, Republic, Washington, U.S.
It resembles a large elevated horst surrounded by tectonic-erosive slopes, the most prominent of which are found on the western and eastern edges, near Rrethi i Kurorës and Rajcë, respectively. As the mountain range descends southeastward, it becomes less elevated due to subsidence in the Ohrid graben. The northwestern section of the range is ...