sedimentaryI

sedimentaryI - Physical Geology 101 13. Sedimentary Rocks I...

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Physical Geology 101 1 13. Sedimentary Rocks I (p. 194-208) Sediment Deposition Weathering results in rock being broken down into smaller fragments, called regolith. This regolith is then broken down to form soil. The regolith may also be eroded and transported away from where it first formed by the surface processes of water, wind, and ice. Eventually, eroded material must get dropped somewhere else- a process called __________________. The loose material that is deposited is referred to as _________________ which eventually bonds together and hardens to form sedimentary rock . How much of the Earth's crust is comprised of sedimentary rocks? _________ Nonetheless, sedimentary rocks cover most of the sea floor and about __________ of the continents, so they are the type of rock that we see most often at the surface. Sedimentary rocks are usually banded into many layers, one on top of the next, like a layered cake. Example: __________________________. We call these layers __________ or _____________, and the overall appearance is called either: ____________________ or ____________________. Each bed is separated from the next by a break called a ________________________. We can we distinguish one bed from another because they commonly show: ______________________________________________________ Significance of Sediments The appearance of beds in sedimentary rocks and the type of sediment that makes up the rock can tell us many things about the history of the Earth. This is because sediments tell us something about the surface processes that created the sediment. We can understand this by looking at the types of sediments we find in different environments on Earth today. Example: How different are the sediments found in river channels, lake bottoms, and beaches? Fill in the type of sediment in each environment: RIVER CHANNELS: ________________ LAKES: _______________ BEACHES: ________________ So different environments and on Earth, and the processes that occur there, tend to be associated with different types of sediment. What do we call these different types of environments? __________________________________.
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Physical Geology 101 2 Sedimentary rocks can tell us about the past distributions of rivers, lakes, oceans, deserts, and glaciers. We may even learn about how climate changed over time in certain places.
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sedimentaryI - Physical Geology 101 13. Sedimentary Rocks I...

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