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WardsSci000450
Description:
Rhyolite is a pale, pink felsic rock with lower density than most igneous rocks.
Description:
Scoria is a dark-colored rock formed from lava with a high gas content.
Description:
Obsidian is hard black colored, volcanic glass.
Description:
Gray andesite with large, blocky hornblende phenocrysts.
Description:
Coarse-grained, with microcline, biotite and horblende phenocrysts.
Description:
Porphyritic igneous rock containing biotite, feldspar, and hornblende.
Description:
Classic, very coarse-grained igneous texture.
Description:
Dark gray, composed mostly of pyroxene and olivine.
Description:
Light gray, with flow structure.
Description:
Coarse-grained plagioclase and pyroxene with some olivine.
Description:
Shiny black volcanic glass showing conchoidal fracture and some spherulites.
Description:
Coarse, “salt and pepper”: dark pyroxene and light andesine.
Description:
Dark gray, with hornblende as the dominant mafic mineral.
Description:
Gabbro is Mafic igneous rock formed deep underground consisting of olivine and pyroxene.
Description:
Introduce your students to Gray Andesite with large phenocrysts of hornblende.
Description:
Pale pink felsite, with small sanidine phenocrysts.
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Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the is still displayed and you need assistance, please call us at 1-800-962-2660.
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