orogenesis


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Related to orogenesis: plate tectonics

orogenesis

[‚ȯr·ə′jen·ə·səs]
(geology)
References in periodicals archive ?
The principal Scandian orogenesis is a product of oblique collision between Baltica and Laurentia in the Late Silurian to Early Devonian, during which the Baltoscandian margin was subducted beneath Laurentia.
Some of these differences may be due to variations in the initial state of the Proterozoic margin; some may be due to variations in convergence during orogenesis, and some may be due to variations in convergence today.
The Humber Zone (Williams, 1979) represents the peripheral part of the Laurentian craton that was involved in Appalachian orogenesis.
The Meguma zone, the furthest outboard terrane in the Northern Appalachians, is absent on the island of Newfoundland, but its accretion to composite Laurentia was probably responsible for Middle to Late Devonian orogenesis (Neoacadian) and voluminous granitoid magmatism in Nova Scotia.
Ri~ deposits have not been identified and the earliest Mesoproterozoic activity relevant to the ensuing Grenvillian orogenesis was the construction of a continental magnuttie arc between ca.
Widespread Paleoproterozoic collisional orogenesis occurred between ca.
Other factors that may have influenced style but are difficult to quantify include convergence obliquity, the distribution and concentration of heat-producing elements, differing atmospheric conditions, delamination, plume activity, and intracratonic orogenesis.
The climax of Appalachian orogenesis (continent-continent collision) took place in the Devonian, and is characterized by a change from calc-alkaline to S-type plutonism, along with transcurrent deformation.
Considerations addressed were the scale and time scale of orogenesis, strike variations, across-orogen variations, nature and age of the Moho and crustal thickness, and presence of subduction scars and mantle reflections.
The coarse-grained rocks generally occur in very thick beds, implying s hort transport and rapid deposition within a dynamic continental environment following Acadian orogenesis.
Although most deformation of the Siluro-Devonian rocks in the region has traditionally been ascribed to the Middle Devonian Acadian Orogeny (Helmstaedt 1968; Ruitenberg 1968; Donohoe 1978), Silurian orogenesis in some areas is now well documented in the region based on [[blank].
Transformation of Fe-Ti gabbro to coronite, eclogite, and amphibolite in the Baie du Nord segment, Manicouagan Imbricate zone, eastern Grenville province: evidence for high heat flow in the lower crust during orogenesis