A new NE-dipping subduction appeared to the E of New Caledonia at the Paleocene-Eocene boundary, it generated the eclogite-blueschist complex of northern New Caledonia, consumed the eastern Australian Plate, and eventually ended with Late Eocene obduction when the Norfolk Ridge blocked the subduction zone. active period for the lar ge region between the Aegean Sea and the Indian Ocean.
During the Late Cretaceous-Eocene, marginal rifting isolated New Caledonia, and after a short period of shallow water terrigenous sedimentation associated with minor volcanic activity, only pelagic sediments accumulated. obduction: A geologic process in which the oceanic crust of the edge of a tectonic plate is thrust over the continental crust of the edge of another, adjacent plate. At that time, proto-New Caledonia was located in afore-arc region in which volcanic-arc detritus accumulated whilst accretion and subduction of oceanic and terrigenous material formed an accretionary complex metamorphosed into the blueschist facies. The Gondwanan phase (Permian-Early Cretaceous), is marked by subduction along the SE Gondwaland margin. Geology, Debris Flow The Ligurian Units of Western Tuscany (Northern Apennines): insight on the influence of pre-existing weakness zones during ocean closure. noun geology The overthrusting of continental crust by oceanic crust or. Cenozoic doming associated with Eurasian-Arabian collision and incision of deep wadis resulted in spectacular outcrops cutting the allochthonous units associated with obduction, as well as the entire overridden passive margin sequence. A geologic process in which the oceanic crust of the edge of a tectonic plate is thrust over the continental crust of the edge of another, adjacent plate. Abstract : The geological evolution of New Caledonia may be divided into three phases. Samail ophiolite emplacement has become a type-example for ophiolite obduction. During obduction the overridden sedimentary basin was forced to deep burial. The Oman Mountains define a continent-ocean collision boundary of dominantly Late-Cretaceous age, affected by further but minor.
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