What type of metamorphic facies are associated with subduction of oceanic crust?
In this regard, what is ocean floor metamorphism?
Ocean-floor metamorphism is a concept that has arisen from recent studies of present oceanic ridges and fracture zones where new crust is being generated, altered, and deformed.
Additionally, what are 2 metamorphic minerals formed along oceanic ridges? Ocean-ridge metamorphism This metamorphism is attributed to the high heat flow and intense fluid circulation that occurs along oceanic ridges. Resulting metamorphic rocks usually include greenstones and amphibolites, i.e., the low- and medium-grade metamorphic equivalents of oceanic basalt.
Beside above, how are Isograds related to metamorphic facies?
Isograds are lines drawn to connect the first observed occurrence of an index mineral, such as garnet, when traveling from low-grade to high-grade metamorphic rocks. Geologists can, therefore, "contour" the ancient distributions of metamorphic temperatures and pressures in a terrain by mapping isograds.
What type of plate boundary is metamorphism most common?
Contact metamorphism is common at both convergent and divergent plate boundaries, in areas where molten rock is produced. Regional metamorphism largely occurs at convergent plate boundaries. Each of these types of metamorphism produces typical metamorphic rocks, but they may occur in different sequences.