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Sedimentary rocks make up about three-quarters of the rocks at the Earth’s surface. They form at the surface in environments such as beaches, rivers, the ocean, and anywhere that sand, mud, and other types of sediment collect.
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www.windows.ucar.edu/tour/link=/earth/geology/sed_intro...
www.windows.ucar.edu/tour/link=/earth/geology/sed_intro.html
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A photo gallery of sedimentary rocks by Geology.com ... Sedimentary rocks are formed by the accumulation of sediments. There are three basic types of sedimentary rocks: 1) clastic sedimentary rocks such as breccia, conglomerate, sandstone and shale, that are formed from mechanical weathering debris;
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geology.com/rocks/sedimentary-rocks.shtml
geology.com/rocks/sedimentary-rocks.shtml
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What are Sedimentary Rocks? ... Sedimentary rocks are the result of the weathering process on earth. Most sedimentary rocks are composed of fragments or particles which strongly resemble sediments. Most are formed by the compaction and cementing of sediments.
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regentsprep.org/Regents/earthsci/sedrocks.htm
regentsprep.org/Regents/earthsci/sedrocks.htm
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The characteristic feature of sedimentary rocks is their stratification; they are frequently called stratified rocks. Sedimentary rocks made up of angular particles derived from other rocks are said to have a clastic texture, in contrast to pyroclastic sediments, which are particles of volcanic origin.
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www.infoplease.com/ce6/sci/A0860757.html
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ORGANIZATION OF THE SEDIMENTARY ROCK SIT ... ; An Introduction to Sedimentary Rocks for the Beginner; Alphabetical Encyclopedia of Sedimentary Rocks; The Trouble With Sedimentary Rocks; Sedimentary Rock Classification And Identification...
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csmres.jmu.edu/geollab/Fichter/SedRx/index.html
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Sedimentary rocks often have fossils in them. Plants & animals that have died get covered up by new layers of sediment and are turned into stone. Most of the fossils we find are of plants & animals that lived in the sea.
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www.rocksforkids.com/RFK/howrocks.html
www.rocksforkids.com/RFK/howrocks.html
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Sedimentary rocks are called secondary, because they are often the result of the accumulation of small pieces broken off of pre-existing rocks. There are three main types of sedimentary rocks: ... Clastic: your basic sedimentary rock. Clastic sedimentary rocks are accumulations of clasts: little pieces of broken up rock...
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jersey.uoregon.edu/~mstrick/AskGeoMan/geoQuerry13.html
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Textures and Structures of Sedimentary Rocks ... For larger view, click on picture or words. ... *Conglomerate (Photo Duncan Heron) From a mill stone, probably the Millstone Grit in the Sanford Triassic Basin, NC...
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www.env.duke.edu/eos/geo41/seds.htm
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