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What is a type of sedimentary rock formed by the precipitation of minerals dissolved in a lake river or seawater?
Wiki User
∙ 12y ago
sedimentary rock formed by the denudational process of various activity. the sediments in sea water may deposited and thus lead to the formation of sedimentary rock
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoChemical
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What is the similarity between oceans and lakes?
They are bodies of water, contain living organisms, have beaches, waves, seaweed, people live by them, swim in them, and have been around for centuries.
On what bases can sedimentary rocks be identified?
Sedimentary rocks are those made of grains of preexisting rocks or organic material that, in most cases, have been eroded, deposited, compacted, and cemented together. They typically form at the surface of the Earth as sediment moves as a result of the action of wind, water, ice, gravity, or a combination of these. Sedimentary rocks also form as chemicals precipitate from seawater, or through accumulation of organic material such as plant debris or animal shells. Common sedimentary rocks include shale, sandstone, limestone, and conglomerate. Sedimentary rocks typically have a layered appearance because most sediments are deposited in horizontal layers and are buried beneath later deposits of sediments over long periods of time. Sediments deposited rapidly, however, tend to be poorly layered if layers are present at all.Sedimentary rocks form in many different environments at the surface of the Earth. Eolian, or wind blown, sediments can accumulate in deserts. Rivers carry sediments and deposit them along their banks or into lakes or oceans. Glaciers form unusual deposits of a wide variety of sediments that they pick up as the glacier expands and moves; glacial deposits are well exposed in the northern United States. Sediments can travel in currents below sea level to the deepest parts of the ocean floor. Secretion of calcium carbonate shells by reef-building organisms produce large quantities of limestone. Evaporation of seawater has resulted in the formation of widespread layers of salt and gypsum. Swamps rich in plants can produce coal if organic material accumulates and is buried before aerobic bacteria can destroy the dead plants.Sedimentary rocks are classified on the basis of the sizes of the particles in the rock and the composition of the rock. Clastic sedimentary rocks comprise fragments of preexisting rocks and minerals. Chemical precipitates are sedimentary rocks that form by precipitation of minerals from seawater, salt lakes, or mineral-rich springs. Organic sedimentary rocks formed from organic matter or organic activity, such as coal and limestone made by reef-building organisms like coral. Grain sizes in sedimentary rocks range from fine clay and silt to sand to boulders.The sediment in a sedimentary rock reflects its environment of deposition. For example, wind-blown sand grains commonly display evidence of abrasion of their surfaces as a result of colliding with other grains. Sediments transported long distances tend to decrease in size and are more rounded than sediment deposited near their precursor rocks because of wearing against other sediments or rocks. Large or heavy sediments tend to settle out of water or wind if the energy of the water or wind is insufficient to carry the sediments. Sediments deposited rapidly as a result of slides or slumps tend to include a larger range of sediment sizes, from large boulders to pebbles to sand grains and flakes of clay. Such rocks are called conglomerate. Along beaches, the rhythmic activity of waves moving sediment back and forth produces sandstones in which the grains are well rounded and of similar size. Glaciers pick up and carry a wide variety of sediments and often scratch or scrape the rocks over which they travel.Sedimentary rocks are the only rocks in which fossils can be preserved because at the elevated temperatures and pressures in which igneous and metamorphic rocks form, fossils and organic remnants are destroyed. The presence of fossils and the types of fossil organisms in a rock provide clues about the environment and age of sedimentary rocks. For example, fossils of human beings are not present in rocks older than approximately two million years because humans did not exist before then. Similarly, dinosaur fossils do not occur in rocks younger than about 65 million years because dinosaurs became extinct at that time. Fish fossils in sedimentary rock indicate that the sediments that make up the rock were deposited in a lake, river, or marine environment. By establishing the environment of the fossils in a rock, scientists learn more about the conditions under which the rock formed.Spectacular exposures of sedimentary rocks include the Grand Canyon (Arizona), the eolian sandstones of Zion National Park (Utah), the limestones of Carlsbad National Park (New Mexico), and glacial features of Voyageurs National Park (Minnesota).Source(s):http://science.jrank.org/pages/5919/Rock…
What percentage of sea water is salt?
The global average is 3% but it does vary. Seawater has a salinity of arround 3.5 percent. In river deltas and depending on the river water mass this percentage may be eliminated for several kilometers like Amazon river. There is a salt lake in Israel Dead Sea which is the saltiest place on Earth that the salt percentage is 30% approximately.
What type of water should be used when washing a wound caused by a sea?
seawater
Similarities between salt water and freshwater?
Seawater is water from a sea or ocean On average, seawater in the world's oceans has a salinity of about 3.5% (35 g/L, or 599 mM). This means that every kilogram (roughly one liter by volume) of seawater has approximately 35 grams (1.2 oz) of dissolved salt (predominantly sodium chloride iron: Na+, Cl−). The average density of seawater at the ocean surface is 1.025 g/gm Seawater is denser than both fresh water and pure water (density 1.0 g/ml @ 4 °C (39 °F)) because the dissolved salts add mass without contributing significantly to the volume. The freezing point of sea water decreases as salt concentration increases. At a typical salinity it freezes at about −2 °C (28.4 °F). The coldest sea water ever recorded (in a liquid state) was in 2010, in a stream under an Antarctic glacier, and measured −2.6 °C (27 °F
What is rock salt made from the evaporation of seawater?
Chemical sedimentary rock is created by precipitation of minerals out of, or evaporation from, saturated solutions that are high in dissolved minerals. Rock gypsum and rock salt are two examples.
Which process most likely formed a layer of the sedimentary rock gypsum?
precipitation from seawater
Physical precipitation of gypsum due to evaporation of seawater produces which kind of sedimentary rock?
chemical
How do chemical rocks form?
The key is the sediments. ... Biochemical sedimentary rocks are formed from organic processes that involve living organisms producing the sediments. These living organisms can be snails and clams whose discarded calcium carbonate shells can form limestone.
Why is it correct to to say seawater is a mixture?
sea water has many dissolved salts , minerals , ores , gases so it is called a mixture
Why is it correct to say seawater is is a mixture?
sea water has many dissolved salts , minerals , ores , gases so it is called a mixture
Why is it correct to say seawater is a mixture?
Because seawater is made up of many elements that can be seperated.
What is the term for sedimentary rock that is composed of material evaporated for seawater?
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.
Minerals that crystallize directly from seawater are examples of?
Minerals that crystallize directly from seawater are examples of hydrogenous sediment.
What gas is dissolved in seawater?
oxygen \
What process does not add salt to seawater?
Precipitation, land water runoff and the melting of icebergs do not add salts to seawater.
Why are minerals that are highly water soluble difficult to find in large deposits or are found only in dry regions?
There is a lot of water on earth. A lot of it. And it is continually recycled. It has a tendency to wash anything that is water soluble into the ocean, where it remains dissolved as the water cycle continues. This has been happening for millions and millions of years, and a lot of water soluble minerals have been dissolved in seawater over that time.In contrast, we can find water soluble minerals in dry regions. In places where it is extremely arid, there is so little precipitation that the water soluble minerals haven't been dissolved and washed away like they have been in other regions.
