sedimentary rock facts wikipedia

Chalk - Wikipedia

Chalk - Wikipedia

Chalk is a soft, white, porous, sedimentary carbonate rock, a form of limestone composed of the mineral calcite Calcite is an ionic salt called calcium carbonate or CaCO 3 It forms under reasonably deep marine conditions from the gradual accumulation of minute calcite shells shed from micro-organisms called coccolithophor

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Flint - Wikipedia

Flint - Wikipedia

Flint is a hard, sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone Flint was widely used historically to make stone tools and start fir It occurs chiefly as nodules and masses in sedimentary rocks, such ,

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Limestone - Wikipedia

Limestone - Wikipedia

Limestone is a carbonate sedimentary rock that is often composed of the skeletal fragments of marine organisms such as coral, foraminifera, and molluscsIts major materials are the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO 3)A closely related rock is dolomite, which contains a high percentage of the mineral dolomite, CaMg(CO 3) 2

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Clastic rock - Wikipedia

Clastic rock - Wikipedia

Clastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock A clast is a fragment of geological detritus, chunks and smaller grains of rock broken off other rocks by physical weathering Geologists use the term clastic with reference to sedimentary rocks as well as to particles in sediment transport whether in suspension or as bed load, and in sediment deposits

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Sedimentary Rock Facts for Kids - Information & Examples

Sedimentary Rock Facts for Kids - Information & Examples

Enjoy our sedimentary rock facts for kids Find interesting information and a range of examples that help explain what sedimentary rocks are and what makes them different from other kinds of rocks Sedimentary rocks are formed by sediment that is deposited over time, usually as ,

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Rock cycle - Wikipedia

Rock cycle - Wikipedia

The rock cycle is a basic concept in geology that describes transitions through geologic time among the three main rock types: sedimentary, metamorphic, and igneousEach rock type is altered when it is forced out of its equilibrium conditions For example, an igneous rock such as basalt may break down and dissolve when exposed to the atmosphere, or melt as it is subducted under a continent

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Sedimentary rock - Simple English Wikipedia, the free ,

Sedimentary rock - Simple English Wikipedia, the free ,

Sedimentary rocks are rocks formed from sedimentThey are deposited over time, and often show layers which can be seen in cliffsOther types of rock are igneous rock and metamorphic rock Sediments are usually formed from matter which falls to the bottom of oceans and lakThe matter includes tiny pieces of other rocks, and dead animals, plants and microorganisms

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Sedimentary Rock Facts - ScienceStruck

Sedimentary Rock Facts - ScienceStruck

Apr 04, 2018· Rocks have always helped scientists to understand the geological events in a better light The fossils found in various sedimentary rocks often provide valuable information pertaining to the life of the flora and fauna present million years ago The following article unveils more fascinating facts about these rocks

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Rock (geology) - Wikipedia

Rock (geology) - Wikipedia

Metamorphic rocks are formed by subjecting any rock type—sedimentary rock, igneous rock or another older metamorphic rock—to different temperature and pressure conditions than those in which the original rock was formed This process is called metamorphism, meaning to "change in form"The result is a profound change in physical properties and chemistry of the stone

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