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Rocks

metamorphic rocks - Chert is a microcrystalline or cryptocrystalline sedimentary rock material composed of silicon dioxide

Granite Adamellite (Shap Granite)

Adamellite granite, also called Shap Granite from Cumbria. Showing coarse crystal texture with large pink feldspar crystals.

Disharmonic folds in gneiss.  Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks.

Disharmonic folds in gneiss. Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks.

Ooh I know all this, helpful for sorting your rock collection!

Vintage Geology Wall Chart Rocks & Minerals by HoofAndAntler-tells us what are some Rocks versus some Minerals

Great idea for elementary teachers teaching geology, or that young paleontologist!  Awesome ebay find! Large rusty orange conglomerate rock with shell scallop fossils imprints school

Large rusty orange conglomerate rock with shell scallop fossils imprints school

Metals (native copper and gold), magnetite and pyrite

Metallic bonds occur in metallic minerals (like native copper and gold) and metalloid minerals (like magnetite and pyrite).

Granodiorite is a phaneritic texture intrusive igneous rock similar to granite, but containing more plagioclase feldspar than orthoclase feldspar. According to the QAPF diagram, granodiorite has a greater than 20% quartz by volume, and between 65% to 90% of the feldspar is plagioclase.

Granodiorita Granodiorite is a phaneritic texture intrusive igneous rock similar…

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