study guide for earth science

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All rocks follow the same pathway through the rock cycle is a false statement. Why?

Rocks can change at any given time to any kind of rock.

How does granite change into sandstone?

Granite is weathered into sediments. The sediments are compacted or cemented together to form sandstone.

How does sandstone change into quartzite?

It forms when a quartz-rich sandstone is altered by the heat, pressure, and chemical activity of metamorphism. These conditions recrystallize the sand grains and the silica cement that binds them together.

Define Metamorphic rock.

A metamorphic rock is a result of a transformation of a pre-existing rock. The original rock is subjected to very high heat and pressure, which cause obvious physical and/or chemical changes.

What does foliated mean?

repetitive layering in metamorphic rocks. Each layer may be as thin as a sheet of paper, or over a meter in thickness.

Give an example of a foliated rock.

Slate, schist, and gneiss

Which major group or groups of rocks are involved in the description?

Igneous & Metamorphic

Which major group of rocks are involved in the description?

Metamorphic & Sedimentry

how are metamorphic rocks formed?

metamorphic rocks are formed when rocks are close to some molten magma, and so get heated up

what are foliations in metamorphic rocks?

alligned grains of minerals

why would a metamorphic rockshow signs of great stress?

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