aulacogen


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aulacogen

[‚au̇′läk·ə·jən]
(geology)
A major fault-bounded trough considered to be one part of a three-rayed fault system on the domes above mantle hot spots; the other two rays open as proto-ocean basins.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Kaufman, "COCORP profiling across the southern Oklahoma Aulacogen: overthrusting of the Wichita Mountains and compression within the Anadarko basin," Geology, vol.
In a larger-scale context, the Baltic dolerites and the alkaline rocks of northeastern Poland were preceded by magmatic activity in the Pripyat palaeorift in southern Belarus which represents the northwestern continuation of the Dnieper-Donetsk Aulacogen in Ukraine.
The study area lies at the transition zone between the Arkoma Basin and the Ouachita orogenic belt and could also be associated with northwest trending faults associated with the southern Oklahoma aulacogen [26, 27].
The basin fill thickens to the northeast, into the Oklahoma aulacogen, and thins to the south and west, toward the Llano uplift and the Bend arch, respectively The Barnett Shale also thins to the west over the Bend arch where it interfingers with the Chappel Formation [14-17].
Anomalies associated with Proterozoic structures include thicker crust (53 km) beneath the Kapuskasing uplift, a Paleoproterozoic intracratonic thrust (e.g., Percival, 1994), and thinner crust (35 km) beneath the Nipigon plate, a Mesoproterozoic aulacogen developed on Superior Province basement.
The New Madrid fault zone is thought to be an aulacogen - the failed arm of a plate tectonic rift system.
Evolution of the Nigeria's Benue Trough (aulacogen): a tectonic model.
Tectono-sedimentological evolution of an elongate intracratonic basin (Aulacogen): The case of the Benue Trough of Nigeria.
Thus, the negative DLFI zone outlined at the upper Amazon river aulacogen may also infer a prospective sedimentary basin for oil and gas exploration.