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30 Cards in this Set
- Front
- Back
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Sill
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Igneous intrusion that is horizontal
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Breccia
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Rock with sharp, angular fragments
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Basalt is the...
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Main rock in the oceanic crust
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Rock
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naturally occuring solid substance that is made of 2 or more minerals
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Lacolith
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Intrusion with an arched-domelike shape
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Igneous
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formed from hardening of molten rock
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Granite is the...
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main rock in continental crust
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Metamorphic
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Forms from heat and pressure
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Limstone, Marbel and Chalk all contain...
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calcium carbonate
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Phaneritic
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crystals are larger then sand
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Marble
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rocke that is unfoliated and can be used for countertops
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Chalk and coal are this type of sedimentery rock
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organic
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Stock
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smaller version of batholith
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Glassy (2)
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massive and porous
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Conglomerate
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rock that has round pebbles cemented together by mud and sand
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Aphanetic
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crystals are smaller than grains of sand
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Phorpheritic
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2 or more sizes of crystals present
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Sedimentery
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most fossils found; particles are then compacted and cemented together
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parent rock of slate is...
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shale
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Coal
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This rock is made up of plant remains
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the 2 types of igneous rocks
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intrusive and extrusive
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3 types of sedimentary rocks
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clastics, organics, chemical
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intrusive formed
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formed underground
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extrusive formed from..
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formed from lava
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2 types of metamorphic
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foliated and un foliated
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foliated
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crytals are arranged in paralell layers of bands
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un-foliated
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no bands of crystals and do not break in layers
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dikes
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intrusion that cuts across rock layers
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sills
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intrusion that is horizontal
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how do igneous rocks with a glassy texture form?
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rock cools very quickly--- to quick for crystals to grow
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