Web26 Sep 2024 · Rocks can become metamorphic when they are exposed to intense heat, high pressure, hot mineral-rich fluids, or, more frequently, a combination of these elements. … WebA special type of metamorphism takes place under these very high-pressure but relatively low-temperature conditions, producing an amphibole mineral known as glaucophane (Na …

8.2: Metamorphic Rock Identification - Geosciences LibreTexts

Web3 Sep 2024 · Metamorphic rocks (changed rocks) are made when existing rocks are subjected to high temperatures and high pressures for long periods of time. … WebMetamorphic rocks. Metamorphic rocks have been subjected to tremendous heat and/or pressure, causing them to change into another type of rock. They are usually resistant to weathering and erosion ... how can i get oec certificate

What are metamorphic rocks? U.S. Geological Survey

WebA special type of metamorphism takes place under these very high-pressure but relatively low-temperature conditions, producing an amphibole mineral known as glaucophane (Na 2 (Mg 3 Al 2)Si 8 O 22 (OH) 2), which is blue in colour, and is a major component of a rock known as blueschist. If you’ve never seen or even heard of blueschist, it’s ... WebAnswer: The Earth radius is 6371 km. Geologists say the center or core of the Earth is in molten / liquid state of sand and rock. As we go to the Earth surface temperature is cooled and we have the room temperature or ambient temperature. The outer molten spherical shape is not true. Some with c... Web10 Jan 2024 · $\begingroup$ Nice answer, as far as i understand, metamorphic is any rock which has undergone high pressure change where a previous type of rock from which it came can be determined. the result is mostly a result of viscosity, movement and recrystallyzation, where mafic and felsic minerals tend to coagulate a bit into new crystals … how can i get obamacare insurance