Sedimentary rocks can form when minerals in a body of water have so saturated the water that they precipitate out, like a cloud that is so full of moisture that it pours out rain. Some limestones are formed in this manner as the mineral calcite precipitates out of a saturated solution and undergoes the process of compaction and cementation. The supersaturated solutions can also be caused by evaporation of a body of water high in mineral content. As the water evaporates, the mineral percentage of the remaining solution becomes higher and higher, until the mineral crystallizes. Rocks such as rock salt and rock gypsum are formed in this manner. Sedimentation from precipitation and evaporation form rocks called chemical sedimentary rocks.
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Limestone is a common example of a chemical sedimentary rock that forms from the accumulation and cementation of calcium carbonate minerals, usually from the remains of marine organisms such as coral or shell fragments.
Some sedimentary rocks form when seawater, loaded with dissolved minerals, evaporates. Chemical sedimentary rock also forms when mineral-rich water from geysers, hot springs, or salty lakes evaporates.
-From the glencoe text book
P.S.- Just copy and paste this then put it in your own words I wont mind, even if you don't put it in your own words I won't mind but put it in your own words because on time my teacher caught me by typing in a few words in her plagiarizing ap. Peace.
Well chemical rocks can either be made from evaporation or crystallization. An some examples for evaporation is rock salt, gypsum, and limestone. Some examples of crystallization is limestone , and calcite.
Gypsum, Halite, or rock salt are examples ofevaporites. One reason minerals precipitate is because of the evaporation. When water evaporates, the minerals that were dissolved in the water are left behind. Eventually, concentration of minerals in the remaining water becomes high enough to cause minerals to precipitate out of the water. The Minerals left behind are called Evaporites.
Halite. When Sodium and Chlorine ions become so concentrated in a shallow body of water, they crystallize and form Halite.
Unlike most other sedimentry rocks, chemical rocks are not made of pieces of sediment. Instead, they have mineral crystals made from elements that are dissolved in water
Rock salt is a chemical sedimentary rock.
A sedimentary rock that is composed of material evaporated from seawater is described as chemical.A sedimentary rock that is composed of material evaporated from seawater is described as chemical.
A sedimentary organic rock is living or was once living like a coral. Chemical is chemically made and is usually man cut.
Chemical sedimentary rocks
The main sub-categories of sedimentary rocks are clastic, chemical, and organic. Clastic sedimentary rocks form from the accumulation and cementation of fragments of pre-existing rocks. Chemical sedimentary rocks form from the precipitation of minerals from water solutions. Organic sedimentary rocks form from the accumulation and compression of organic materials, such as plant or animal remains.