the type of sedimentary rocks is based on the minerals present. If organisms facilitate the precipitation of these minerals from water we refer to the rocks as ... gypsum. In this lab, we will focus on siliceous and carbonate biochemical sedimentary rocks. Chert is a rock composed of microcrystalline varieties of quartz, and thus it has ...Each type of sedimentary rock is formed when sediments lithify (turn into rock). Chemical sediments are sediments that precipitate from solution, for example salt crystals that grow at the bottom of an evaporating body of water. ... Gypsum rock is made of the mineral gypsum. Chalcedony is made of microcrystalline quartz, quartz grains so tiny ...Copy. Gypsum rocks are sedimentary rocks made up of sulfate mineral and formed as the result of evaporating sea water in massive prehistoric basins. This rock is found in many parts of the world ...Characteristics: Rock gypsum is composed mainly of the single mineral, gypsum. Gypsum is very soft (softer than a fingernail and so can be scratched by a fingernail). ... It is composed mostly of sand particles, which are of medium size; therefore, sandstone is a medium-grained clastic sedimentary rock. What type of sedimentary …... forms as an evaporite deposit associated with sedimentary rocks. Gypsum is deposited from lake & sea water but also from hot springs associated with ...The use of sedimentary rock can be found in most buildings and monuments. Some uses of this type of rock are provided below. Limestone is used to make cement. Limestone and sandstone are used for building stones. Quartz is a type of sedimentary rock which is used to make glass. Rock gypsum is used to make plaster. Rock Type: Sedimentary – A chemical sedimentary rock made from the mineral calcite (CaCO3) that contains small rounded grains known as ooids. Significantly effervesces with hydrochloric acid (HCl). Click on image to see enlarged photo.Table 4.2 shows some common types of sedimentary rocks and the types of sediments that make them up. Figure 4.12: This cliff is made of a sedimentary rock called sandstone. The bands of white and red represent different layers of sediment. ... Rock Salt: Chemical precipitate: Rock Gypsum: Chemical precipitate: Dolostone: Chemical precipitate ...Sedimentary rocks can be subdivided into four groups based on the processes responsible for their formation: clastic sedimentary rocks, biochemical (biogenic) sedimentary rocks, chemical sedimentary rocks, and a fourth category for "other" sedimentary rocks formed by impacts, volcanism, and other minor processes. Clastic sedimentary rocks.Overheads shown in Lab. SEDIMENTARY ROCK: Made from sediments consolidated at the earth's surface. The sediments are deposited at the earth's surface by water, wind, glacial ice, or bio-chemical processes. Typically the sediments are deposited in layers under COOL conditions [thereby distinguishing it from a layered volcanic rock (TUFF)].Type: Sedimentary Rock: Origin: Chemical: Texture: Nonclastic; Fine-grained: Composition: ...As a consequence, gypsum typically occurs as layers associated with limestone, dolostone, shale, and rock salt. As seawater evaporates, gypsum is the first ‘salt’ to be precipitated, followed by anhydrite, halite, and finally sylvite. Usually found with other evaporite and carbonate minerals, such as anhydrite, calcite, dolomite, borax, and ...Sandstone is a clastic sedimentary rock comprised of sand-sized particles about .1 to .2 mm in size. It is usually tan, brown, or reddish in color, and often (but not always) displays noticeable layers. The sand grains are most often made of quartz, cemented together by calcite or silica.What type of sedimentary rock is gypsum? chemicalBrowse over 1 million classes created by top students, professors, publishers, and experts. Entrance Exams. Foreign Languages. Medical & Nursing. Humanities & Social Studies. Health & Fitness.Verified answer. Rock salt and rock gypsum are examples of ________ sedimentary rocks. Which of the following sedimentary rocks is clastic? breccia fossiliferous limestone rock gypsum. What type of sedimentary rock is rock gypsum? A. clastic B. organic C. chemical.Conglomerate Composition. Conglomerate is a type of sedimentary rock that is composed primarily of rounded or water-worn pebbles, cobbles, and boulders, which are known as clasts. These clasts are typically cemented together by a matrix of finer-grained sedimentary material, such as sand, silt, or clay.Sediments are grains of rocks, minerals, or mineraloids deposited on the surface of the earth. Reflect on the rock cycle for an indication of the relationships between the rocks that erode to become sediments and sedimentary rocks. For sediment to become sedimentary rock, it usually undergoes burial, compaction, and cementation. Sedimentary rocks are one of the three main types of rocks, alongside igneous and metamorphic rocks. These rocks are made from tiny particles of rocks, minerals, and even organic material like plants and shells. Over millions of years, these particles, known as sediment, are pressed together and become solid rock.6.1 Clastic Sedimentary Rocks A clast is a fragment of rock or mineral, ranging in size from less than a micron [1] (too small to see) to as big as an apartment block. Various types of clasts are shown in Figure 5.12 and in Exercise 5.3. The smaller ones tend to be composed of a single mineral crystal, and the larger ones are typically composed of …ADVERTISEMENT. What Are Sedimentary Rocks? Sedimentary rocks are formed by the accumulation of sediments. There are three basic types of sedimentary rocks. Clastic sedimentary rocks form from the accumulation and lithification of mechanical weathering debris. Examples include: breccia, conglomerate, sandstone, siltstone, and shale.Etymology and history The word gypsum is derived from the Greek word γύψος ( gypsos ), "plaster". [9] Because the quarries of the Montmartre district of Paris have long furnished burnt gypsum ( calcined gypsum) used for various purposes, this dehydrated gypsum became known as plaster of Paris. The porous sedimentary rock has a considerable amount of practical uses around the home. You probably don’t give chalk a whole lot of thought on regular basis—but maybe you should. Chalk isn’t just for old-school classrooms or for kids who ...Sep 9, 2023 · Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate (CaSO4·2H2O). It is commonly found in sedimentary rock formations and is often associated with other minerals such as anhydrite, halite, and sulfur. The name “gypsum” is derived from the Greek word “gypsos,” which means “plaster” or “chalk.” On the basis of transporting agents such as running water, wind, glaciers, ocean currents, and sea waves, the sedimentary rocks can be categorized as: 1. The Argillaceous Rocks. 2. The Aeolian Sedimentary Rocks. 3. The Glacial Sedimentary Rocks. Mechanically formed Sedimentary rocks - Alternate name: Stratified Rocks.Types of Sedimentary Rocks. Based on origin can be classified into 4 groups. Clastic sedimentary rocks: quartz, feldspar, clay minerals, or mica ... oolitic limestone, halite (rock salt), sylvite, baryte, and gypsum. Sedimentary rocks are formed by volcanism, impacts, and other minor processes: volcanic tuff, breccias, etc. Followings are the ...Question: QUESTION 1 which type of sedimentary rock forms when ons in a solution are precipitated through inorganic or bio procesu a detto che sementarymde O tomar OL. chemical my rocks da sedinte 1 points QUESTION 2 Which of the following is a collective term for all of the chemical physical and biological changes that take place after …Rock Gypsum. Rock gypsum is composed of the very soft mineral gypsum which defining characteristic is that it can be scratched with a fingernail. It is typically white to very pale pink or tan. Gypsum rock forms within layers of sedimentary rock from the slow evaporation of seawater. Sediments are grains of rocks, minerals, or mineraloids deposited on the surface of the earth. Reflect on the rock cycle for an indication of the relationships between the rocks that erode to become sediments and sedimentary rocks. For sediment to become sedimentary rock, it usually undergoes burial, compaction, and cementation. T or F The most abundant sedimentary rock is shale. True. T or F Most limestone has a biochemical origin. True. he common source of pressure during compaction of sediments is ________. the weight of the sediments deposited above the compacting sediments. Most sediment is formed by ________. settling out of fluid.ADVERTISEMENT. What Are Sedimentary Rocks? Sedimentary rocks are formed by the accumulation of sediments. There are three basic types of sedimentary rocks. Clastic sedimentary rocks form from the accumulation and lithification of mechanical weathering debris. Examples include: breccia, conglomerate, sandstone, siltstone, and shale.Sometimes, when the magma cools very quickly, it forms a kind of black glass that you cannot see through. Sedimentary Rock forms from particles, called sediment ...Sandstone is a clastic sedimentary rock comprised of sand-sized particles about .1 to .2 mm in size. It is usually tan, brown, or reddish in color, and often (but not always) displays noticeable layers. The sand grains are most often made of …Gypsum is a soft, light-colored sedimentary rock deposited in ancient seas that covered Ohio during the Silurian Period. It occurs in both mineral form (selenite) and as a rock in bedded layers. Gypsum occurs interbedded with salt (halite, NaCl) and anhydrite (CaSO 4 ). Gypsum is used in drywall, Portland cement, plaster, bakery products, and ...USES. Gypsum is an industrially important mineral. It is the primary ingredient of plaster-of-Paris, which is finely ground Gypsum, and it is used in the production of cement. It is also the main component of sheet rock. It is used as a flux for creating earthenware, and can be used as a fertilizer.Jan 11, 2021Metamorphic Rocks. Metamorphic rocks are any rock type that has been altered by heat, pressure, and/or the chemical action of fluids and gases. Metamorphic rocks are classified by their structure and their dominant minerals. Metamorphic rock structure is either foliated (has a definite planar structure) or nonfoliated (massive, without structure).Jan 11, 2021 · The main types of sedimentary rocks are clastic or chemical. Some sedimentary rocks are a third type: organic. Clastic sedimentary rocks are made of sediments. The sediments differ in size. Chemical sedimentary rocks are made of minerals that precipitate from saline water. Organic sedimentary rocks are made from the bodies of organisms. Gypsum is a sulfate mineral formed as the byproduct of evaporating saltwater. When this mineral becomes lithified, it forms rock gypsum, a sedimentary rock.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. Gypsum. Gypsum is a mineral found in crystal as well as masses called gypsum rock. It is a very soft mineral and it can form very pretty, and sometimes extremely large colored crystals. Massive gypsum rock forms within layers of sedimentary rock, typically found in thick beds or layers.Sedimentary rocks are created by accumulating existing rocks or fragments of extinct organisms on the Earth's surface. Deep sediment burial causes sediment to get compressed and cemented, resulting in sedimentary rock. Let's study sedimentary rocks in this article. Table of Contents. How Are Sedimentary Rocks formed? What Is Sedimentation? ExamplesCHEMICAL SEDIMENTARY ROCKS - formed when dissolved substances precipitate from water to form sediments and eventually rock; include salts such as ROCK SALT, GYPSUM, and LIMESTONE, and biochemically mediated rocks such as peat, and reef rock (an organic limestone). TYPES OF DETRITAL SEDIMENTARY ROCKSUpdated on November 04, 2019. Designated as Utah's first national park in 1909, Zion is a breathtaking display of nearly 275 million years of geologic history. Its colorful sedimentary cliffs, arches and canyons dominate the landscape for over 229 square miles and are a sight to behold for geologists and non-geologists alike.2018年4月11日 ... ... rock salt, gypsum and some forms of limestone. Flint, chert, jasper & agate are all forms of chemical sedimentary rocks, non-detrital and ...Type: Sedimentary Rock: Origin: Chemical: Texture: Nonclastic; Fine-grained: Composition: ...As a consequence, gypsum typically occurs as layers associated with limestone, dolostone, shale, and rock salt. As seawater evaporates, gypsum is the first ‘salt’ to be precipitated, followed by anhydrite, halite, and finally sylvite. Usually found with other evaporite and carbonate minerals, such as anhydrite, calcite, dolomite, borax, and ...Sedimentary rocks are one of the three main types of rocks, alongside igneous and metamorphic rocks. These rocks are made from tiny particles of rocks, minerals, and even organic material like plants and shells. Over millions of years, these particles, known as sediment, are pressed together and become solid rock.Sedimentary rocks can be subdivided into four groups based on the processes responsible for their formation: clastic sedimentary rocks, biochemical (biogenic) sedimentary rocks, chemical sedimentary rocks, and a fourth category for "other" sedimentary rocks formed by impacts, volcanism, and other minor processes. Clastic sedimentary rocks.Gypsum is a common mineral found in sedimentary rocks on every continent. Drywall, also known as wallboard or Sheetrock, is a layer of gypsum sandwiched between two sheets of thick paper. Gypsum ceiling tiles are smaller and are used in suspension ceilings, also known as suspended ceilings.Chemical and biochemical sedimentary rocks are classified based on the minerals they contain, and are frequently dominated by a single mineral. It is true that some clastic sedimentary rocks, such as quartz arenite, can also be dominated by a single mineral, but the reasons for this are different. A clastic sedimentary rock can contain whatever ...2017年3月3日 ... Late stage displacive gypsum veins possibly form from the excess sulfate ... sedimentary rocks · secondary gypsum rocks · View Full GeoRef Record.Expert Advice. Understanding Gypsum. Authored by: Allen Pyle. Gypsum is calcium sulfate dihydrate (CaSO 4 2H 2 O). It is a natural mineral that occurs in certain types of sedimentary rocks. Gypsum forms when water evaporates in mineral-rich marine soil environments.It occurs in extensive beds associated with other evaporite minerals, particularly in Permian and Triassic sedimentary formations; it is deposited from ocean brine, followed by anhydrite and halite.Overheads shown in Lab. SEDIMENTARY ROCK: Made from sediments consolidated at the earth's surface. The sediments are deposited at the earth's surface by water, wind, glacial ice, or bio-chemical processes. Typically the sediments are deposited in layers under COOL conditions [thereby distinguishing it from a layered volcanic rock (TUFF)].Detrital and clastic are two different words for the same type of sedimentary rock, but the words have different origins. ... Rock salt or halite and gypsum are examples of minerals found in rocks ...Apr 23, 2023 · Sedimentary deposits are mineral deposits that are formed through the accumulation of sediments on or near the Earth’s surface. These deposits can contain a variety of minerals, including metal ores, coal, and industrial minerals such as limestone, salt, and gypsum. Sedimentary deposits are formed through a number of different processes, and ... Sediments may include: fragments of other rocks that have been worn down into small pieces, like sand, organic materials, or in other words, the remains of once-living organisms, or chemical precipitates, which are materials that get left behind after the water evaporates from a solution. Most sediments settle out of water (Figure 4.11). 6.1 Clastic Sedimentary Rocks A clast is a fragment of rock or mineral, ranging in size from less than a micron [1] (too small to see) to as big as an apartment block. Various types of clasts are shown in Figure 5.12 and in Exercise 5.3. The smaller ones tend to be composed of a single mineral crystal, and the larger ones are typically composed of …Common chemical sedimentary rocks include oolitic limestone and rocks composed of evaporite minerals, such as halite (rock salt), sylvite, baryte and gypsum. Other sedimentary rocks This fourth miscellaneous …Gypsum is an important rock-forming mineral in evaporite deposits of chemical sedimentary rocks, where they may be associated with halite, and in carbonatites in association with barite. Gypsum deposition may form massive and stratified beds that are several meters thick, usually in association with beds of limestone, red clays, halite and ...Study with Quizlet and memorize flashcards containing terms like _____ is a form of calcium carbonate. Correct! Travertine Chert Lignite Gypsum, graywacke is _____. Correct! a sandstone with the sand grains embedded in a clay-rich matrix a limestone with abundant, sand-sized, quartz grains a dark, organic-rich, chemical sedimentary rock containing …Sedimentary Rocks. Rivers, oceans, winds, and rain runoff all have the ability to carry the particles washed off of eroding rocks. Such material, called detritus, consists of fragments of rocks and minerals. When the energy of the transporting current is not strong enough to carry these particles, the particles drop out in the process of ... Gypsum is an important rock-forming mineral in evaporite deposits of chemical sedimentary rocks, where they may be associated with halite, and in carbonatites in association with barite. Gypsum deposition may form massive and stratified beds that are several meters thick, usually in association with beds of limestone, red clays, halite and ...Gypsum rock is made of the mineral gypsum. Chalcedony is made of microcrystalline quartz, quartz grains so tiny that they cannot be distinguished even with a standard optical microscope. Table 2 shows some common types of sedimentary rocks. Biochemical Textures. Biochemical sedimentary rocks form with the help of past life. This can be in the ... Browse over 1 million classes created by top students, professors, publishers, and experts. Entrance Exams. Foreign Languages. Medical & Nursing. Humanities & Social Studies. Health & Fitness.ADVERTISEMENT. What Are Sedimentary Rocks? Sedimentary rocks are formed by the accumulation of sediments. There are three basic types of sedimentary rocks. Clastic sedimentary rocks form from the accumulation and lithification of mechanical weathering debris. Examples include: breccia, conglomerate, sandstone, siltstone, and shale.... form a chemical sediment. So, the calcium ions that are part of a calcite ... like rock gypsum and rock salt, and coal. Biological processes are important ...Gypsum rock is made of the mineral gypsum. Chalcedony is made of microcrystalline quartz, quartz grains so tiny that they cannot be distinguished even with a standard optical microscope. Table 2 shows some common types of sedimentary rocks. Biochemical Textures. Biochemical sedimentary rocks form with the help of past life. This can be in the ...Which of the following applies to the basic constituents of halite, gypsum, and sylvite? ... What is the most common type of chemical sedimentary rock? Limestone. Nov 27, 2021 · Gypsum is a common type of sedimentary rock that is used to make chalk. True | False. 9. A collection of small particles of rock that precipitates from a river or other body of water is known as ... On Earth, argillaceous materials and evaporites commonly serve as caprock materials for gas fields, gypsum salt rock exhibiting the most effective sealing performance 98. We propose that the ...Description. Gypsum is a mineral found in crystal as well as masses called gypsum rock. It is a very soft mineral and it can form very pretty, and sometimes extremely large colored crystals. Massive gypsum rock …Chemical sedimentary rocks are identified by identifying the mineral from which they are composed. In this lab there are four minerals that need to be identified - quartz, halite, gypsum and calcite. Quartz has a hardness of 7 and is very difficult to scratch, even with a good quality knife blade. Gypsum is relatively soft (Hardness =2) …The biggest division in sedimentary rock types is based on the primary type of weathering that leads to the material building the sedimentary rock. ... such as halite and gypsum. In this lab, we will focus on siliceous and carbonate biochemical sedimentary rocks. Chert is a rock composed of microcrystalline varieties of quartz, and thus it has ...Clastic Sedimentary Rocks; Grain Size Rounding Sorting Rock Name; gravel coarse (> 2 mm) angular: poorly: breccia: rounded: poorly: conglomerate: sand medium (0.0625 - 2 mm) variable: ... rock salt: evaporating water body: gypsum: softer than fingernail: gypsum rock: evaporating water body « Back to TOP .2019年1月14日 ... Gypsum, also known as calcium sulfate hydrate, is a naturally occurring mineral found in layers of sedimentary rock all over the world.Chalk is a soft, white, porous, sedimentary carbonate rock.It is a form of limestone composed of the mineral calcite and originally formed deep under the sea by the compression of microscopic plankton that had settled to the sea floor.Chalk is common throughout Western Europe, where deposits underlie parts of France, and steep cliffs are …Sandstone is made up of small, sand-size grains of mineral, rock, or organic material. There is also a cementing material within sandstone that holds the individual grains together. This cementing material also might contain a matrix of silt or other clay-size particles that take up the spaces in between the grains.Detrital Sedimentary Rocks. Detrital sedimentary rocks form from detritus, the rock and mineral fragments that are transported by gravity, water, ice, or wind. Detrital sediments are classified by grain size. Detritus is classified by its grain size. Grains larger than 2 millimeters are called gravel . Grains between 1/16 mm and 2 mm are called ...Which of the following applies to the basic constituents of halite, gypsum, and sylvite? ... What is the most common type of chemical sedimentary rock? Limestone. Sediments are grains of rocks, minerals, or mineraloids deposited on the surface of the earth. Reflect on the rock cycle for an indication of the relationships between the rocks that erode to become sediments and sedimentary rocks. For sediment to become sedimentary rock, it usually undergoes burial, compaction, and cementation. A. Types of Sedimentary Rocks 1. Clastic 2. Biochemical (e.g., Limestone) 3. Organic (e.g., Coal) 4. ... Erosion, Transportation, and Deposition determines Sediment Type and ultimately, if lithified, Rock Type. Increasing Duration of Weathering and Winnowing out of silt and Clay sized particles (predominantly clay minerals)Evaporites occur within Triassic rocks exposed along the South Wales coast near Cardiff, where the beds of gypsum form conspicuous white layers in the red marls ...Gypsum is composed of calcium sulphate (CaSO4) and water (H2O). Its chemical name is calcium sulphate dihydrate (CaSO4.2H2O). Gypsum can be milled mixed with water and then resume its original rock-like state. …Formation of Sedimentary Rocks: There are two types of sedimentary rocks. The first is clastic sedimentary rocks made from small fragments of other rocks. The second is chemical sedimentary rocks formed when mineral-rich water leaves a deposit. Answer and Explanation: 1 Non-Clastic Sedimentary Rocks. How Non-Clastic Sedimentary Rocks are Formed: Formed by chemical precipitation from a concentrated solution in water as salt, gypsum, or limestone. Characteristics: Soft, because they are composed of soft minerals such as halite, gypsum, calcite. They can easily be scratched with steel or a copper penny.Detrital and clastic are two different words for the same type of sedimentary rock, but the words have different origins. ... Rock salt or halite and gypsum are examples of minerals found in rocks ...The finer‐grained clastic sedimentary rocks are called shale, siltstone, and mudstone. Shale is a smooth, thinly layered rock that is made up of fine‐grained silt and clay particles. Shale is considered a fissile rock because it splits very naturally along its layers. A siltstone contains mostly silt grains and looks very similar to shale ...
Overheads shown in Lab. SEDIMENTARY ROCK: Made from sediments consolidated at the earth's surface. The sediments are deposited at the earth's surface by water, wind, glacial ice, or bio-chemical processes. Typically the sediments are deposited in layers under COOL conditions [thereby distinguishing it from a layered volcanic rock …. Excel boats for sale craigslist
This reddish rock is arkose, a young feldspathic sandstone. Andrew Alden / Wikimedia Commons. Arkose is a raw, coarse-grained sandstone deposited very near its source that consists of quartz and a significant proportion of feldspar.. Arkose is known to be young because of its content of feldspar, a mineral that usually degrades quickly into clay.Its mineral grains are generally angular rather ...Rock salt (composed of the mineral halite, or table salt), rock gypsum (composed of gypsum), and crystalline limestone (composed of calcite) are common chemical sedimentary rocks. Organic sedimentary rocks form from organically derived sediments. These organic sediments come from either animals or plants and usually consist of body …6. Salt: Salt is a mineral that is composed of the elements sodium and chlorine. It is highly soluble in water and is prone to both chemical and mechanical weathering. 7. Gypsum: Gypsum is a sedimentary rock that belongs to the group of evaporites. It is formed through the precipitation of mineral-rich water in ancient seas or …Chemistry. Middle School. answered. What type of sedimentary rock is gypsum? AI-generated answer. Answer. 2 people found it helpful. WalterSlater2006. report flag outlined. Answer: Gypsum is a chemical sedimentary rock. Explanation: It forms when large bodies of water are rich in calcium and sulfate. arrow right. Explore similar answers. messages.What type of sedimentary rock is gypsum? chemicalGypsum is a soft, light-colored sedimentary rock deposited in ancient seas that covered Ohio during the Silurian Period. It occurs in both mineral form (selenite) and as a rock in bedded layers. Gypsum occurs interbedded with salt (halite, NaCl) and anhydrite (CaSO 4 ). Gypsum is used in drywall, Portland cement, plaster, bakery products, and ... Geology. Historical Geology (Bentley et al.) 5: Earth Materials - Rocks. 5.5: Classification of Sedimentary Rocks.What is Coal? Coal is an organic sedimentary rock that forms from the accumulation and preservation of plant materials, usually in a swamp environment. Coal is a combustible rock and, along with oil and natural gas, it is one of the three most important fossil fuels.Coal has a wide range of uses; the most important use is for the generation of electricity.Gypsum is an evaporite mineral most commonly found in layered sedimentary deposits in association with halite, anhydrite, sulfur, calcite, and dolomite. Gypsum (CaSO 4. 2H 2 O) is very similar to Anhydrite (CaSO 4 ). The chemical difference is that gypsum contains two waters and anhydrite is without water. Gypsum is the most common sulfate mineral.Zircon and tourmaline are dense, highly insoluble, chemically stable, minor minerals of igneous and metamorphic rocks. In which sedimentary rock might you expect to find these minerals concentrated? A) limestone representing lithified coral-reef carbonates. B) a thin, upper, mudstone portion of a thick graywacke bed with graded bedding ... form a chemical sediment. So, the calcium ions that are part of a calcite ... like rock gypsum and rock salt, and coal. Biological processes are important ....