Rocks The solid mineral material forming part of the surface of the earth and other planets.
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Transcript of Rocks The solid mineral material forming part of the surface of the earth and other planets.
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Rocks
The solid mineral material forming part of the surface ofthe earth and other planets.
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Igneous Rocks
“Fire Rocks”
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Volcano
Volcanoes may be active, dormant, or extinct.
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Basalt
Extrusive, dark, most common type of rock in theEarth’s crust, and makes up most of ocean floor.
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Granite
Intrusive (formed by slow cooling of magma underground). It is often used
for building.
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Obsidian
Formed when lava cools quickly above ground.It is black glass with sharp edges and is used for making cutting tools and arrowheads.
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Pumice
Cooled quickly allowing air bubbles to form.Light enough to float on water.
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Rhyolite
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Scoria
“Lava Rock”, lightweight extrusive rock with large,gas bubbles. It is usually red or dark in color.
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Sedimentary Rocks
“Layered rocks”
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Breccia
Made up of angular pieces cemented togetherby minerals.
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Conglomorate
Rounded pieces cemented together by minerals.
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Limestone
Made up from the mineral calcite which came from bedsof evaporated seas and lakes and sea animal shells.
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Sandstone
Composed of sand-sized minerals or rock grains.
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Shale
A fine-grained rock made up of mud that is a mix of
clay and salt minerals.
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Travertine
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Hematite
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Coal
The actual remains of dead plants from long ago.
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Fossils
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Metamorphic Rocks
“Changed Rocks”
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Gneiss
Used to be granite, but heat and pressure turned it into gneiss. It as bands of gray and white.
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Hornfel
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Marble
Used to be limestone until heat and pressure turned it intothe metamorphic rock called marble.
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Quartzite
Was once sandstone and then heat and pressure transformedit into the metamorphic rock Quartzite.
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Schist
Used to be Basalt. Heat and pressure changed it intothe Metamorphic rock, Schist.
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Slate
Used to be shale. Heat and pressure changedit into slate.
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Metamorphic “Changed”
Sandstone ------------------ QuartziteLimestone ------------------ MarbleGranite ------------------ GneissBasalt ------------------ SchistShale ------------------ Slate