Geology Midterm Property Categories
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
