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Sedimentary rock homework help

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Rocks are made of minerals. Rocks can be a mixture of different kinds of minerals, a mixture of many grains of the same kind of mineral, or a mixture of different grains of rocks. When you split a rock into very small pieces, the pieces are different from each other. For example, when you break granite apart, you get small pieces of quartz clear , feldspar pink or white , and mica black.
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Sedimentary rock

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Geology | Homework Help | CliffsNotes

Sedimentary rocks form at or near the earth's surface from the weathered remains of pre-existing rocks or organic debris. The term sedimentary rock applies both to consolidated, or lithified sediments bound together, or cemented and unconsolidated sediments loose, like sand. Although there is some overlap, most sedimentary rocks belong to one of the following groups: clastic, chemical, or organic. Mechanical weathering breaks up rocks, while chemical weathering dissolves and decomposes rocks. Weathering of igneous, metamorphic, and sedimentary rocks produces rock fragments, or clastic sediments, and mineral-rich water , or mineral solutions. After transport and laying down, or deposition, of sediments by wind , water, or ice , compaction occurs due to the weight of overlying sediments that accumulate later. Finally, minerals from mineral-rich solutions may crystallize, or precipitate, between the grains and act as cement.
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How Rocks Form: Igneous Rocks, Sedimentary Rocks, Metamorphic Rocks

Rocks are made of one or more minerals. There are three main classifications of rock, based on the way the rock was formed: sedimentary, metamorphic and igneous. Soil is formed of fine rock particles mixed with air, water and particles from dead plant and animal matter. There are three main types of soil which are classified according to the amount of sand and clay in them.
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Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at the Earth's surface , followed by cementation. Sedimentation is the collective name for processes that cause these particles to settle in place. The particles that form a sedimentary rock are called sediment , and may be composed of geological detritus minerals or biological detritus organic matter. The geological detritus originated from weathering and erosion of existing rocks, or from the solidification of molten lava blobs erupted by volcanoes.
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