rock types

Rock TypesIgneous Rocks

Sedimentary Rocks Metamorphic Rocks

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Rock Types Rocks are classified (organized) based on

how they were formed (made). There are 3 types of rocks.

Rock Type

Sedimentary

IgneousMetamorphic

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I. Sedimentary RocksHow They are Made

A. Wind and water break downthe Earth.B. Sediment (bits of Earth) settle in lakes and rivers.C. Layers are formed and build up.D. Pressure and time turn the layers to rock.

Types of Sedimentary Rocks

Gypsum

Sandstone

Shale

Limestone

Conglomerate

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II. Metamorphic RocksWhat are They?

A. Rocks that have changedB. They were once igneous or sedimentary rocks.C. Pressure and heat changed the rocks.

Types of Metamorphic Rocks

Schist Gneiss

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Igneous RocksWhat are They?

A. Formed underground by trapped, cooled magma.B. Formed above ground when volcanoes erupt and lava cools.

Types of Igneous RocksGranite Scoria

Pumice Obsidian

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Rocks