Quiz prep for igneous rocks and ternary diagrams
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| A dark colored igneous rock with no visible crystals cooled how? | quickly on the earth's surface
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| Large crystals found in a fine-grained groundmass can indicate what? | origin from a magma with an early intrusive phase followed by an extrusive phase and that it is a rock of mixed volcanic-plutonic origin
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| Igneous rocks with a two-stage intrusive-extrusive origin are recognized by a texture that is called what? | porphyritic
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| Igneous rocks with a texture that is so fine-grained that the crystals are too small to see is what? | aphanitic
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| Natural glass, such as obsidian, forms when magma cools how? | cools too rapidly for crystals to form
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| Igneous rocks formed by explosive volcanic activity have a texture that is termed... | pyroclastic
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| Which of the following is an indication of crystal size in an igneous rock? | texture
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| Which of the following is a fine-grained member of the felsic family? | rhyolite
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| Gabbro is chemically most similar to which of the following rocks? | basalt
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| Which of the following would most likely form from a mafic magma that cooled slowly underground? | gabbro
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| Felsic rocks are high in what? | silica
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| A vesicular felsic rock is called what? | pumice
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| Which of the following rocks is a member of the intermediate family? | andesite
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| What are the texture and composition of gabbro? | texture- coarse-grained (phaneritic)
composition - mafic
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| What is the texture of tuff? | pyroclastic
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| In general, if magma cools quickly, will the crystals be smaller or larger? | smaller
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| In the diagram on the board, what percent of A does #1 have? | 60%
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| In the diagram on the board, what percent of B does #1 have? | 20%
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| In the diagram on the board, what percent of C does #1 have? | 20%
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| In the diagram on the board, what percent of A does #2 have? | 25%
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| In the diagram on the board, what percent of B does #2 have? | 40%
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| In the diagram on the board, what percent of C does #2 have? | 35%
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| In the diagram on the board, what percent of A does #3 have? | 10%
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| In the diagram on the board, what percent of B does #3 have? | 70%
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| In the diagram on the board, what percent of C does #3 have? | 20%
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| In the diagram on the board, what percent of A does #4 have? | 0%
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| In the diagram on the board, what percent of B does #4 have? | 25%
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| In the diagram on the board, what percent of C does #4 have? | 75%
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Created by:
gabriellehartmann21
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