It was drilled in the northern limb of the Pechenga geosyncline
composed of rhythmically interbedded volcanogenic and tuffaceous-sedimentary strata extending to the NW at 300-310 and dipping to the SW at angles of 30-50 (Kozlowsky, 1987).
In the extended geological period, Jizhong Depression experienced three developmental stages, namely, geosyncline
, platform, and rifting stage.
They are associated with a thrusting caused by the closure of the Gulf geosyncline
. Decollement, associated with the evaporitic layers, means frequently the structure at the surface is not always coincidental with the structure at the hydrocarbon producing levels.
Geomorphological coefficient according to the slope Degrees slope inclination Geomorphological coefficient 0-2 0.1 2-5 0.2 5-8 0.3 8-12 0.5 12-15 0.5 15-30 0.6 30-45 0.7 45-68 0.8 68-90 0.9 K(c): The structural factor K(c) map resulted from the allocation coefficients 0.2, 0.4 and 0.8 corresponding geological structures with typical flysch facies in geosyncline
areas, geological formations strongly folded and deployed, geological formations affected by a dense network of cleavage, fissures and stratification.
The Razorback Iron Deposit is hosted in the Neo-Proterozoic Braemar Iron Formation, a tillitic unit that is part of the Adelaidean Geosyncline
The Allamber Project is located 175 kilometers southeast of Darwin and covers 482 square kilometers within the prospective Pine Creek Geosyncline
The Clare Valley, 400 km north of the sites in the south-east district, is in a ridge and valley geologic province of moderate relief and underlain by broadly folded Late Precambrian meta-sediments of the Adelaide Geosyncline
. Red Brown Earth soils in this area commonly rest on this Precambrian bedrock.
Jordan enjoys a favorable location alongside the rich oil-production basins of the Gulf Coast Geosyncline
, but nearly 60 percent of the 100 or so wells drilled in Jordan were clustered around discoveries, with only a few wells extending through the entire sedimentary spectrum.
In contrast, Aubouin (1965) proposed that ophiolites were generated through differentiation of gigantic deep extrusions on the seafloor, in the frame of the geosyncline
concept, an idea already proposed by Brunn (1959).
Geology of the study area consists of inter-bedded sedimentary bedrock of shale, siltstone, limestone, and coal that was laid down in the shallow seas of the Mississippian, Pennsylvanian, or Permian periods in an anticline that dips eastward to the Appalachian Geosyncline
(Rypma 1961; Keys and others 1995).
(1938): Studies of the Mexican geosyncline
. Geological Society of America Bulletin, 49: 1651-1694.