CWI GEOL EXAM 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | The extrusive magma cools quickly so the mineral grains do not have time to grow
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| Nonclastic textures are common in which of the following sedimentary rocks? | show 🗑
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| show | an explosive stratovolcano
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| show | Sheet erosion, rills, and gullies develop mainly during prolonged droughts.
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| show | Very quickly, over the course of hours to days
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| show | dissolved ions in solution
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| show | Temperature
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| In which area would weathering by frost wedging probably be most effective? | show 🗑
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| show | texture
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| Coal beds originate in ___. | show 🗑
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| show | basaltic shield volcanoes
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| Which term best describes an accumulation of angular rock fragments at the base of a steep, bedrock slope or cliff? | show 🗑
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| show | Breccia
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| A ____ is an open cavity in a volcanic rock that was filled by a gas bubble when the lava was still mainly liquid. | show 🗑
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| When a geologists observes vesicles in basaltic lava flows they typically find them: | show 🗑
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| show | ripple marks and cross stratification
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| Which kind of eruptive activity is most likely to be highly explosive? | show 🗑
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| What mineral particles are the dominant coloring agents in reddish, brownish, and yellowish soils? | show 🗑
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| show | matrix or groundmass
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| Oolitic limestone is most likely to form in what type of depositional environment? | show 🗑
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| Visible quartz and potassium feldspar grains are the main constituents in a ___. | show 🗑
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| show | transported
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| Which of the following minerals crystallized early in Bowen's reaction series? | show 🗑
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| show | arkose
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| show | a flood basalt plateau
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| show | involves a major change in the mineral composition of the weathered material
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| ____ is characterized by very coarse mineral grains? | show 🗑
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| show | mud cracks
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| Which type of basaltic lava flow has its surface covered with sharp-edged, angular blocks and rubble? | show 🗑
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| Which of the following best describes sets of fractures in relatively fresh bedrock, such as granite, that are roughly parallel to the land surface? | show 🗑
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| What do pumice and obsidian have in common? | show 🗑
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| show | calcite; it is soft and relatively soluble
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| show | Temperatures remain high as lowered pressures decrease melting temperatures.
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| Which type of sediment undergoes the most compaction as it lithifies to sedimentary rocks? | show 🗑
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| show | the volcanoes of Hawaii and the recent activity in Yellowstone National Park
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| show | North-facing slopes receive about the same amount of precipitation as south-facing slopes; less moisture evaporates from north-facing slopes.
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| Sedimentary rocks account for about what percentage of the Earth's outermost 10 kilometers of rock (first percentage). Also, what percentage of the Earth's continental area is covered by sedimentary rocks (second percentage)? | show 🗑
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| show | apples; land between the trees is planted in grass and not cultivated
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| show | silca; calcite
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