thrust sheet


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thrust sheet

[′thrəst ‚shēt]
(geology)
References in periodicals archive ?
The frontal part of this thrust sheet extends 20 km to the east of the study area, close to the Millahue fault (Fig.
Thrust variations in structural geometry along strike of the range can be explained in terms of ramping nature and motion along thrust sheet.
Most of the macro- scale anticlines constitute the hanging wall thrust sheet of the emergent and non-emergent thrust faults in both the ranges.
In the Datta Khel nappe, the ophiolite sequence starts with gabbros at the base, and the ultramafic rocks occur only as fault-bounded blocks, irregularly distributed in the thrust sheet.
The Waziristan-Kurram Block consists of a tectonic collage of thrust sheets derived from the shelf-oceanic basin transition zone in the Neotethys at the western margin of the Indian Plate and includes 1) Tani Formation, 2) dismembered ophiolite, 3) Triassic-Palaeocene Kurram-Khaisora Group and 4) Cretaceous Kahi Group (Satara-Zakha, Shinkai Post and Khajori Post formations), with Indian Plate passive-margin inner shelf autochthonous sequence exposed in window structures beneath these thrust sheets.
2) Muscovite from the uppermost Lesser Himalayan thrust sheet commonly preserves pre-Cenozoic 40Ar/39Ar ages revealed as old age steps produced during step heating analyses (summarized by Herman et al.
The thrust sheet has a flat-ramp-flat geometry extending over about 90 km and riding over a cushion of EoCambrian evaporites.
Shortening is manifested by stacking of thrust sheets (Figure 4), which progressively shifted from north to south.
It holds three oil fields, including Santa Cruz, where horizontal wells on the shoreline tap deep into a stack of carbonated thrust sheets offshore.