Earth Science 3 3
Transcript of Earth Science 3 3
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Sedimentary Rocks 3.3
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Erosion• The incorporation and transportation of
material by a mobile agent, such as water, wind, or ice.
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Deposition • The process by which an agent of erosion
loses energy and drops the sediment it is carrying; also the process by which water vapor is changed directly to a solid without passing through the liquid state.
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Compaction• Process by which sediments are
squeezed together by the weight of overlying materials driving out water.
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Cementation• Solidification of sediments by the
deposition of dissolved minerals in the tiny spaces between the sedimentary particles.
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Clastic Sedimentary Rock• A sedimentary rock made of broken
fragments of preexisting rock.
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Chemical Sedimentary Rock• Sedimentary rock consisting of material
that was precipitated from water by either inorganic or organic means.
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Key Concept
• Describe the major processes involved in the formation of sedimentary rocks.–Erosion involves weathering and the
removal of rock. When an agent of erosion-water, wind, ice, or gravity-loses energy, it drops the sediments.
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Key Concept
• What are clastic sedimentary rocks?–A sedimentary rock made of broken
fragments of preexisting rock.
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Key Concept
• What are chemical sedimentary rocks?–Sedimentary rock consisting of
material that was precipitated from water by either inorganic or organic means.
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Key Concept
• What features are unique to some sedimentary rocks?–The many unique features of
sedimentary rocks are clues to how, when, and where the rocks formed.