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In contrast, chemical and biochemical sedimentary rocks are dominated by components that have been transported as ions in solution (e.g., Na +, Ca 2+, HCO 3 –, etc.). There is some overlap between the two because almost all clastic sedimentary rocks contain cement formed from dissolved ions, and many chemical sedimentary rocks include some ...
Oct 20, 2021 · Chemical sedimentary rocks are one of four specific types of sedimentary rocks, and they are also referred to as orthochemical sedimentary rocks . Formed as a result of the accumulation of precipitated minerals, chemical sedimentary rocks can occur due to organic or inorganic processes. Examples of sedimentary rocks include limestone, dolostone ...
The name of a chemical sedimentary rock can be modified by a textural term, to create a more descriptive and meaningful name. Some important textures for chemical sedimentary rocks include crystalline, oolitic, bioclastic, fossiliferous [2], and amorphous. A simplified classification chart for chemical sedimentary rocks is presented in Table 5.5.
Chemical and organic sedimentary rocks are those that are precipitated from chemicals that are dissolved in water or are produced by the activities of organisms, or the accumulation of their remains. In contrast to siliciclastic sedimentary rocks that are composed of sediment grains that may have traveled great distances prior to being ...
Chert is a sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO 2 ). It occurs as nodules, concretionary masses, and as layered deposits. Chert breaks with a conchoidal fracture, often producing very sharp edges. Early people took advantage of how chert breaks and used it to fashion ...
Aug 25, 2003 · Chemical Sedimentary Rocks. Unlike most other sedimentary rocks, chemical rocks are not made of pieces of sediment. Instead, they have mineral crystals made from elements that are dissolved in water. The water in the oceans, lakes, and ground is often full of dissolved elements. All sorts of things can dissolve into water.
Oct 19, 2023 · Sedimentary rocks can be organized into two categories. The first is detrital rock, which comes from the . erosion and accumulation of rock fragments, sediment, or other materials—categorized in total as detritus, or debris. The other is chemical rock, produced from the dissolution and precipitation of minerals.
