Types of Rocks

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What are the three main types of rocks?

The three main types of rocks are igneous, sedimentary, and metamorphic.

How are igneous rocks formed?

Igneous rocks are formed from the cooling and solidification of magma or lava.

How are sedimentary rocks formed?

Sedimentary rocks are formed by the compaction and cementation of sediments.

What are metamorphic rocks and how do they form?

Metamorphic rocks are formed from existing rocks that undergo change due to heat and pressure.

Name a commonly known igneous rock.

Granite is a commonly known igneous rock.

Name a commonly known sedimentary rock.

Sandstone is a commonly known sedimentary rock.

Name a commonly known metamorphic rock.

Marble is a commonly known metamorphic rock.

What is the rock cycle?

The rock cycle is a series of processes through which rocks transform from one type to another.

How does erosion contribute to rock formation?

Erosion breaks down rocks into sediments that can form sedimentary rocks.

Can igneous rocks turn into metamorphic rocks? How?

Yes, igneous rocks can become metamorphic rocks through heat and pressure.

What is the texture of igneous rocks like?

Igneous rock texture ranges from coarse to fine, depending on the cooling rate of the magma.

What factors affect the formation of metamorphic rocks?

The formation of metamorphic rocks is affected by heat, pressure, and chemically active fluids.

What is foliation in metamorphic rocks?

Foliation is a layered or banded appearance in metamorphic rocks due to pressure alignment of minerals.

What is the primary mineral component of limestone?

Calcite is the primary mineral component of limestone.

Why are sedimentary rocks often rich in fossils?

Sedimentary rocks form in environments that deposit and preserve organic material, leading to fossil formation.

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