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Rocks - Mineralogy
Rocks - Names
Question | Answer |
---|---|
Intermediate; feldspars, pyroxene, and/or hornblende | Andesite |
Plagioclase feldspar, olivine and pyroxene | Basalt |
Plagioclase feldspar, quartz, biotite, hornblende, and augite | Dacite |
Rhyolitic | Obsidian |
Andesitic to Rhyolitic | Pumice |
Quartz, feldspar, biotite, hornblende, with accessory magnetite | Rhyolite |
Usually similar to Basalt | Scoria |
Basalt to rhyolite | Tuff |
Feldspar, hornblende, biotite, and pyroxene | Diorite |
Feldspar, hornblende, biotite, and magnetite | Gabbro |
Quarts, feldspar, biotite, hornblende, and magnetite | Granite |
Quartz, feldspars, altered olivine, rare garnets, orthopyroxene, and chrome diopside | Pegmatite |
Olivine and pyroxene | Peridotite |
Typically basalt or rhyolite | Porphyry |
Amphiboles such as hornblende and actinolite; feldspar | Amphibolite |
Muscovite mica, chlorite; pyrite a frequent accessory | Argillite Gneiss Greenstone Hornfels Marble Phyllite Quartzite Serpentine Shale Slate |
Muscovite biotite, kyanite, and glaucophane varieties | Schist |
Large clasts in cement matrix | Breccia Conglomerate |
Silica | Chert |
Very fine | Claystone |
Carbon | Coal |
Clastic environment usually | Concretions |
Chemical deposition | Coquina Limestone |
Chemical | Dolomite Phosphorite |
Large quartz or feldspar clasts in cement matrix | Sandstone |
Fine–very fine | Siltstone |
Clastic | Wacke / |