Sentence examples for regional metamorphism from inspiring English sources

Metamorphic rocks produced during collisions between oceanic and continental plates from different localities around the world also show striking similarities to each other (see below Regional metamorphism) yet are markedly different from metamorphic rocks produced during continent-continent collisions.

Importantly, there is also no record in the Coorg Block for the 2.5 Ga pervasive regional metamorphism that affected all the other blocks in this region.

But these metamorphic events are of trivial volumetric significance compared with those of regional metamorphism.

This dating reveals a 1555 ± 16 Ma metamorphic event, interpreted to be the consequence of M3 amphibolite facies, regional metamorphism and accompanying metasomatism.

There are two main types of metamorphism: (1) contact metamorphism, in which changes induced largely by increase in temperature are localized at the contacts of igneous intrusions; and (2) regional metamorphism, in which increased pressure and temperature have caused recrystallization over extensive regions in mountain belts.

Anthophyllite is commonly produced by regional metamorphism of ultrabasic rocks.

Quartz and carbonate veins are prevalent and demonstrate abundant flow of CO2-rich and H2O-rich hydrothermal fluids prior to and after regional metamorphisms.

Recently published precise reconstructions of P T paths and detailed analyses of metamorphic textures show that some regional metamorphic rocks, including the Sanbagawa metamorphic belt, have undergone pervasive retrogressive hydration metamorphism during exhumation (e.g., Ota et al. 2004; Okamoto and Toriumi 2005; Maruyama et al. 2010).

They are found in almost every variety of igneous rock and also occur in rocks of widely different compositions formed under conditions of regional and contact metamorphism.

The mineral assemblages are quite similar to those found in regional greenschist-facies metamorphism, except for the presence of low-pressure phases such as andalusite.

Rocks of the albite-epidote-hornfels facies are characteristically found as the outer zones of contact aureoles where the thermal episode fades out and the rocks pass into their regional grade of metamorphism.