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The thrust belt consists of a series of thrust faults that branch off the Moine Thrust itself. Topographically , the belt marks a change from rugged, terraced mountains with steep sides sculptured from weathered igneous , sedimentary and metamorphic rocks in the west to an extensive landscape of rolling hills over a metamorphic rock base to the ...
In such a system the rock mass (hanging wall block) that has been transported by movement along the thrust is called a nappe. When erosion or normal faulting produces a hole in the nappe where the underlying autochthonous (i.e. un-transported) rocks crop out this is called a window. Klippen are also a feature near windows.
By strain, the Main Central Thrust is defined as a broad zone which a few kilometers thick. This zone accommodates most of the ductile shear zones and brittle thrust faults between the lowermost part of the Greater Himalayan Crystalline complex and the uppermost part of the Lesser Himalayan Sequence. [7] [8]
Thrust tectonics or contractional tectonics is concerned with the structures formed by, and the tectonic processes associated with, the shortening and thickening of the crust or lithosphere. It is one of the three main types of tectonic regime, the others being extensional tectonics and strike-slip tectonics .
In geology, a nappe or thrust sheet is a large sheetlike body of rock that has been moved more than 2 km (1.2 mi) [1] or 5 km (3.1 mi) [2] [3] above a thrust fault from its original position. Nappes form in compressional tectonic settings like continental collision zones or on the overriding plate in active subduction zones.
The thin-skinned style of deformation is typical of many fold and thrust belts developed in the foreland of a collisional zone or back arc of a continental volcanic arc. This is particularly the case where a good basal decollement exists, usually in a weaker layer like a shale, evaporite, or a zone of high pore fluid pressure. [2]
Diagram of a subduction zone. The megathrust fault lies on the top of the subducting slab where it is in contact with the overriding plate. The term megathrust refers to an extremely large thrust fault, typically formed at the plate interface along a subduction zone, such as the Sunda megathrust.
BGS map sheet book reference/s East Glenfalloch Fault: Sc 46W East Ochil Fault: Sc 40E Trewin (ed) 2002 East Saltcoats Fault: Sc 31E East Scapa Fault: Orkney Orkney Islands (Special 100K) BGS:BRG 1 Eilrig Thrust (also as 'Eilrig Thrust Zone') Sc 63W Eller Fault: Sc 15W, Sc 15E Enthorn Fault: Sc 11 Ericht - Laidon Fault (*also as Ericht-Laiden ...