Metamorphism and Metamorphic Rocks

The video tutorial explores the formation and classification of metamorphic rocks, focusing on the concept of metamorphic facies. It explains how different pressure-temperature conditions lead to various types of metamorphism, categorized into low, medium, and high P/T series. The tutorial also covers the metamorphism of specific rock types, such as mafic and felsic rocks, and discusses the mineral transformations that occur during these processes.

What is the primary purpose of grouping metamorphic rocks into facies?

• To measure the density of the rocks

• To compare rocks from different locations and relate them to geologic environments

• To determine the color of the rocks

• To identify the age of the rocks

Which type of metamorphism occurs when an igneous body intrudes and 'bakes' the surrounding rock?

• Shock metamorphism

• Burial metamorphism

• Contact metamorphism

• Regional metamorphism

At what pressure does low P/T metamorphism generally occur?

• Between 5 and 10 kilobars

• Exactly 5 kilobars

• Below 2 kilobars

• Above 10 kilobars

What is the starting facies for medium P/T metamorphism of basalt?

• Greenschist facies

• Amphibolite facies

• Zeolite facies

• Granulite facies

Which mineral is characteristic of the greenschist facies?

• Quartz

• Chlorite

• Sanidine

• Garnet

In high P/T metamorphism, what is the facies characterized by the presence of glaucophane?

• Amphibolite facies

• Eclogite facies

• Blueschist facies

• Granulite facies

What transformation occurs at around 35 kilobars in high P/T metamorphism?

• Quartz to coesite

• Graphite to diamond

• Calcite to aragonite

• Feldspar to mica

What is the metamorphic rock formed from the recrystallization of quartz-rich sandstone?

• Marble

• Gneiss

• Quartzite

• Schist

Which metamorphic rock is formed from the high-grade metamorphism of granite?

• Slate

• Phyllite

• Gneiss

• Marble

What is the equivalent facies for schist in the metamorphism of mudstones?

• Zeolite facies

• Granulite facies

• Amphibolite facies

• Greenschist facies