Cretaceous tectonic evolution of coastal southern California: insights from the Catalina Schist

Article Abstract:

A study on the subduction-related Catalina Schist reveals the late Mesozoic tectonic evolution process of coastal southern California. The island is largely composed of various schists. The accretion and metamorphosis of the terrane may have occurred at around 120-115 Ma in a subduction zone, triggered by the suturing of a fringing island arc to the continent. During progressive underplating in by the cooling, newly initiated subduction zone, the lawsonite-blueschist through amphibolite facies rocks may have formed.

Geology, Stratigraphic, Mesozoic Era, Stratigraphy, Santa Catalina Island

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Tectonic evolution of the Montagne Noire and a possible orogenic model for syncollisional exhumation of deep rocks, Variscan belt, France

Article Abstract:

The structural analysis of the Montagne Noire, which forms the southernmost part of the Variscan Massif Central in France, is presented. The analysis revealed that Montagne Noire is a result of a succession of five foliations in alternately steep and flat-flying orientations, which was found to be manifested by multiple gravitational collapse phases that intervened during continuous plate convergence.

France, Geology, Structural, Structural geology

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