sedimentary rocks

A detailed Summary of sedimentary rocks


Silicon and oxygen, the two most common chemical elements in the Earth's crust, combine as silicon dioxide to form the mineral quartz. SEDIMENTARY ROCKS, are Rocks that are formed by the compaction of sediments or by the crystallization of the dissolved minerals. Quartz is the most abundant mineral in the Earth's crust. Quartz has been found in meteorites and in some rocks collected on the moon. Quartz has the chemical formula SiO2. There are many varieties of quartz, which occurs in nearly all types of igneous, metamorphic and sedimentary rocks. It is an essential mineral in granites, granodiorites and rhyolites. Metamorphism of quartz-bearing igneous and sedimentary rocks typically increases the amount of quartz and its grain size. Quartz is very resista


To form Quartz sandstone, rock particles & remains of living things are deposited in the sea by rivers and waves. These sediments accumulate layer by layer, over thousands or millions of years, forming thick deposits on land or on the sea floor. The weight of the overlying sediments compact those below. Over time, they form sedimentary rocks. Sedimentary rocks usually occur in shallow parts of the sea or in lakes in desert areas where evaporation is higher than precipitation. As evaporation takes place, water is lost and the dissolved minerals form crystals. As evaporation continues, more crystals form and accumulate on the sea or lake floor, becoming sedimentary rocks, i.e. coal. They have a layered appearance because the materials that form them are deposited in layers. Plant and animal fossils can be found

Some common words found in the essay are:
ROCKS Rocks, Mineralogy Quartz, Rock Quartz, Structure Bedding, Medium-grained Usually, sedimentary rocks, quartz sedimentary rocks, varieties quartz, quartz sedimentary, fossils found, quartz found, quartz sand, earth's crust, rocks sands, quartz sandstone, dissolved minerals,

Approximate Word count = 548
Approximate Pages = 2 (250 words per page double spaced)

Category: Science

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