overthrust


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overthrust

[′ō·vər‚thrəst]
(geology)
A thrust fault that has a low dip or a net slip that is large. Also known as low-angle thrust; overthrust fault.
A thrust fault with the active element being the hanging wall.
References in periodicals archive ?
It can be clearly observed that the tectonic transport patterns (material movement) are characterized by strong NE-SW overthrust and the Bashan Arc fault (initialized as a straight line) shows an obvious arc shape extruded toward SW (240[degrees]) which is consistent with the present-day geomorphy in Dabashan area (Dong et al.
The Harbul and Uckardesler veins are also parallel to the overthrust plane.
It is divided in three units: 1) an overthrusted allochthonous unit composed by ultramafic and mafic rocks, the Santa Elena Nappe; 2) an autochthonous basaltic sedimentary suite, resting immediately below the overthrust, the Santa Rosa Accretionary Complex (Baumgartner & Denyer, 2006); and 3) Murcielago Islands basalts.
There is also the 900-mile Rockies Alliance Pipeline proposed by Alliance Pipeline and Questar Overthrust to link the Rocky Mountain Region to Ventura, IA and Chicago, IL trading hubs.
The Rhaetian Railway, including the Albula and Bernina lines, and the 40km-long Glarus Overthrust, a towering outcropping whose top layer somehow formed after its base, were among 27 sites recognised for "outstanding universal value" at a meeting of the World Heritage Committee in Quebec on July 8.
Role of cohesive strength in the mechanics of overthrust faulting and landsliding", Geol.
These include portions of the Overthrust Belt (a subterranean feature rich in natural gas that extends along the eastern flank of the Rocky Mountains into Canada); vast, previously untargeted regions in the North Slope, including Alaska's wildly controversial Arctic National Wildlife Refuge (ANWR, pronounced "anwar"); and deep (1,000-5,000 feet) and ultradeep (5,000-plus feet) offshore regions in the Gulf of Mexico.
Running through the Rocky Mountain West and far into Canada are complex geologic folds and faults known as the Overthrust Belt, coveted by the oil-and-gas industry for its profit potential.
Much of the district consists of Precambrian supracrustal and plutonic rocks that are overlain in the west by younger rocks overthrust during the Caledonian mountain-building period.
A drill hole would ultimately pass through the overthrust to penetrate these sedimentary rocks, perhaps even reaching the underlying basement.
I see very little hope for the Rocky Mountain overthrust belt due to problems with access.
In addition, the Company has 625,000 Mcf/d of capacity on the Overthrust Pipeline available to it pursuant to a long-term lease.