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The Rock Cycle. The 3 Types of Rock. - rocks that form from cooling magma - crystals present ( Examples : granite, pumice, obsidian) - rocks changed by heat and pressure - usually have lines in them ( Examples : gneiss, marble)

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the 3 types of rock
The 3 Types of Rock

- rocks that form from cooling magma

- crystals present

(Examples: granite, pumice, obsidian)

- rocks changed by heat and pressure

- usually have lines in them

(Examples: gneiss, marble)

- eroded material builds up in layers

- pressure turns layers into rock

(Examples: sandstone and limestone)

Igneous Rock

Metamorphic Rock

Sedimentary Rock

slide5

Granite

Basalt

Obsidian

Pumice

slide7

Schist

Gneiss

Marble

slide9

Conglomerate

Sandstone

Limestone