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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 - 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
Granite Basalt Obsidian Pumice
Schist Gneiss Marble
Conglomerate Sandstone Limestone