Introduction to Sedimentary Rock – Flashcards

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Sedimentary Rock
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Rock that forms when sediments are compacted and cemented together
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The formation of sedimentary rock requires
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weathering and erosion of pre-existing rocks ---- Weathering breaks down pre-existing rock into particles, while erosion moves the particles to a site of deposition. These processes begin the formation of sedimentary rock.
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Which of the following agents is capable of moving sediment from the site of formation to the site of deposition?
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wind waves running water ice Sediment can be moved by wind, running water, ice, or waves.
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Which is an example of a sedimentary rock composed of solid masses of intergrown crystals
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Correct! Rock salt is a sedimentary rock that contains intergrown crystals of halite.
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You find a sedimentary rock that has all its flat particles aligned in parallel. From this you can infer that
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If the flat particles are aligned parallel in a sedimentary rock, the particles have been compacted.
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Conglomerate
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Sedimentary Rock made up of rounded pebbles. a clastic sedimentary rock with large fragments in a finer-grained matrix
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Shale
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A fine-grained clastic rock composed of silt plus a significant component of clay, which causes it to break readily along bedding planes. A type of sedimentary rock composed primarily of clay that is compacted together by pressure.
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Bedding
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The division of sediment or sedimentary rock into parallel layers (beds) that can be distinguished from each other by such features as chemical composition and grain size. , layering visible in rocks that results from the settling of particles during deposition
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Basalt
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the commonest type of solidified lava
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Sedimentary rocks that exhibit the intergrowth of crystal masses are generally formed by
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chemical weathering
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Which two minerals are most common in detrital sedimentary rocks?
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Clay minerals are the resistant by-product of chemical weathering and quartz is the most resistant common mineral in Earth's crust. They are common in detrital sedimentary rocks.
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What is the most abundant chemical sedimentary rock in Earth's crust?
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limestone
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Chert
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A hard compact, fine-grained sedimentary rock formed almost entirely of silica. Composition-quartz Characteristics-Microcrystalline; very hard.
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Gypsum
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a common white or colorless mineral (hydrated calcium sulphate) used to make cements and plasters (especially plaster of Paris)
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Rock salt
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evaporate composition; translucent, salty taste, cubic cleavage, A rock: sedimentary, composed of halite with a find to coarse crystalline structure., naturally occurring crystalline sodium chloride
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Flint
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a hard kind of stone; đá lửa; viên đá lửa, the kind of hard stone that makes sparks when struck against steel
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Limestone
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A sedimentary rock composed primarily of calcium carbonate. 10% to 15% of all sedimentary rocks are limestones. Limestone is usually organic, but it may also be inorganic. , A biochemical sedimentary rock lithified from carbonate sediments and composed mainly of calcium carbonate in the form of the mineral calcite., the most abundant chemical sedimentary rock is
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Clastic
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Sedimentary rock that forms when rock fragments are squeezed together under high pressure
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Detrial sedimentary
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sedimentary rocks are made from broken fragments
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Working in the field, you find a rock that contains rounded fragments that are greater than 2 mm in diameter. What would you call this rock?
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Conglomerate is a detrital sedimentary rock that is characterized by rounded fragments that are larger than 2 mm in diameter.
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Deposition
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process in which sediment is laid down in new locations
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