Lower Triassic

Lower Triassic

[′lō·ər trī′as·ik]
(geology)
The earliest epoch of the Triassic period of geologic time, extending from about 230- to 215,000,000 years ago.
References in periodicals archive ?
The Ammonite fauna from the Lower Triassic Mianwali Formation shows at least two episodes of radiation-extinction in the time interval from the Griesbachian to the early Spathian: within just three-to-four million years' time span.
The Company holds and operates the Licence (100%) which contains the Lower Triassic Sherwood Sandstone Kish Prospect that is situated in c.
The vertebrae of Corosaurus alcovensis Case 1936, from the Lower Triassic of Wyoming (USA), and of the genus Cymatosaurus Fritsch 1894, from the Lower-Middle Triassic of Germany, do not present the same morphology that those from Fuencaliente de Medi naceli.
The Lower Triassic Formations of the Salt Range and Trans-Indus ranges, West Pakistan.
API with very low sulphur content was found in the US company's Block 404 in Lower Triassic sandstones at depths of 3,238-3,272 metres (see Vol.
A series of 3-way low side fault traps have been identified, which are juxtaposed against the shale prone Lower Triassic Mt Goodwin section.
Red clastic sediments at the base of the lower Triassic indicated that an erosion period started after sedimentation in the mid-Permian and has been dominant on land in the region.
A first deep exploration well, Shaikan-7 will target the middle to lower Triassic and Permian horizons and its drilling began in April 2013.
The Phoenix South prospect will target gas in lower Triassic reservoirs and will be drilled to a minimum depth of 4,500 metres.
Microconchids were far more common as secondary frame builders in the Late Palaeozoic and Triassic, forming microconchid (= 'spirorbid')-algal stromatolites in the Devonian of France (Mistiaen & Poncet 1983), Lower Carboniferous of Wales, UK (Wright & Wright 1981), Carboniferous of Belgium (Barrois 1904; Hance & Hennebert 1980), Lower Permian of New Mexico, USA (Toomey & Cys 1977), Lower Permian of Germany (Stapf 1971), Triassic of Germany (Haack 1921), Lower Triassic of western Poland (Peryt 1974), and Upper Triassic of southwest Britain (Wright & Mayall 1981).
The Lower Triassic rocks are sandstones and claystones of the variegated sandstone and dolomitic sediments of the Rhaetian.