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Rocks - Coggle Diagram
Rocks
Metamorphic rocks
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This kind of rocks change their form and features,so become different rocks.These are the first kind of rocks on Earth
They are form from exsisting rocks that change their original structures or shapes because of extreme heat or pressure
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Some exemples are
Slate.formed by shale,so metamorphic rock
Schist,formed by slate,so metamorphic rock
Gneiss,formed by granit,so igneous rock
Marbel,formed by limestone and contact rock,so sedimentary rock
Quartzite,formed by quartz or sandstone.so sedimentary rock
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Igneous rocks
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The texture can be
Aphantic,when the crystals are invisible
Phaneritic,when the crystals are visible
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Some exemples are
Obsidian,in an extrusive rock that has a glassy black appereance
Basalt,is an extrusive rock
Pomice,is an extrusive rock
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