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12 Cards in this Set
- Front
- Back
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Which rock type accounts for 75 percent of rocks on Earth's surface? igneous basaltic granitic sedimentary metamorphic |
sedimentary |
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Which category of sedimentary rock forms from the carbon-rich remains of organisms? primary detrital organic chemical |
organic |
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What is the main difference between a conglomerate and a sedimentary breccia? A breccia is well stratified; a conglomerate is poorly stratified. Breccia clasts are the size of baseballs; conglomerate clasts are larger. Breccia has a compacted, clay-rich matrix; conglomerate has no matrix. Breccia clasts are angular; conglomerate clasts are rounded. |
Breccia clasts are angular; conglomerate clasts are rounded. |
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Clay and muddy sediments lithify to form shales and mudstones. True False |
true |
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Detrital sedimentary rocks are classified according to clastic particle size; chemical sedimentary rocks are named according to the most abundant minerals. True False |
true |
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What calcite-rich rock forms from coral reefs? shale gypsum chert limestone sandstone |
limestone |
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Many limestones are of biochemical origin. True False |
true |
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Which environment is conducive to the formation of coal? cave environment tundra environment polar environment desert environment swamp environment |
swamp environment |
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Which sedimentary rock forms from the compression of swamp material? conglomerate lignite limestone dolostone sandstone |
lignite |
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What rock will sand lithify into? sandstone siltstone mudstone shale |
sandstone |
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________, a common mineral found in igneous rocks, is the most abundant mineral in detrital sedimentary rocks. Biotite Orthoclase Calcite Quartz |
Quartz |
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What are small waves of sand on the surface of a sediment layer formed by the action of water or wind called? alluvial fan glacial deposits ripple marks cross-bedding mud cracks |
ripple marks |
