Geology Midterm Property Categories

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Which minerals have an irregular fracture?

Apatite, Pyrite, Hematite, Magnetite, Garnet, Olivine

Which igneous rocks are Mafic?

Basalt, Gabbro

Which minerals have a rhombohedral cleavage (3 not at 90)?

Calcite

Which sedimentary rocks are Organic?

Coal

Which sedimentary rocks are Clastic?

Conglomerate, Greywacke, Quartz Sandstone, Arkose, Shale

Which sedimentary rocks are Bioclastic?

Coquina, Chalk

Which minerals have a metallic luster?

Galena, Pyrite, Hematite, Magnetite

Which igneous rocks are Pegmatitic?

Granite Pegmatite

Which igneous rocks are Felsic?

Granite, Obsidian, Rhyolite, Granite Pegmatite, Rhyolite Tuff, Pumice

Which igneous rocks are Phaneritic?

Granite, Peridotite, Gabbro

Which nonmetallic mineral has a waxy luster?

Halite

Which minerals have a cubic cleavage?

Halite, Galena

Which nonmetallic mineral has a Dull luster?

Hematite

Which minerals have a cleavage of 2 not at 90?

Hornblende, Plagioclase

Which metamorphic rocks are Nonfoliated?

Marble, Quartzite

Which sedimentary rocks are Microcrystalline?

Micrite, Chert

Which minerals have a cleavage of 2 at 90?

Orthoclase, Augite, Plagioclase

Which minerals are considered hard?

Orthoclase, Quartz, Corundum, Pyrite, Magnetite, Garnet, Chlorite, Augite, Hornblende, Plagioclase

Which igneous rocks are Ultramafic?

Peridotite

Which metamorphic rocks are Foliated?

Phyllite, Gneiss, Schist, Slate

Which igneous rocks are Porphyritic?

Porphyritic Andesite

Which igneous rocks are Intermediate?

Porphyritic Andesite, Scoria

Which minerals have a conchoidal fracture?

Quartz, Hematite

Which sedimentary rocks are Crystalline?

Rock Gypsum, Rock Salt, Oolitic Limestone, Fossiliferous Limestone, Dolostone

Which igneous rocks are Vesicular?

Scoria, Pumice

Which nonmetallic mineral has a Pearly luster?

Talc

Which minerals are considered soft?

Talc, Gypsum, Calcite, Fluorite, Apatite, Hematite, Galena, Halite, Biotite, Muscovite

Which minerals have a Basal cleavage?

Talc, Gypsum, Chlorite, Biotite, Muscovite


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