What is shale made out of - Shale gas is an unconventional natural gas that is found trapped within shale formations. Since the 1990s a combination of horizontal drilling and hydraulic fracturing has made large volumes of shale gas more economical to produce, and some analysts expect that shale gas will greatly expand worldwide energy supply.

 
In this context, shale “texture” may be taken to refer to the relative proportions of clay- (<2 μm), silt- (2–62 μm) and sand-size (>62 μm) particles that make up the shale. “Structure” refers to the arrangement of features and constituents of the rock which can be easily observed with the naked eye or with an optical microscope.. Saber tooth tiger smilodon

Start with the straightest piece you can find, and gently peel off the bark with a knife. Rub it down with some form of oil or fat, and then hold it over a fire. Your goal is to warm it to make it more pliable so you can work it straight. The oil helps the wood heat without drying out and keeps it pliable.Shale is usually soft and does not crop out unless harder rock protects it. Geologists are strict with their rules on sedimentary rocks. Sediment is divided by particle size into gravel, sand, silt, and clay. Claystone must have at least twice as much clay as silt and no more than 10% sand. It can have more sand, up to 50%, but that is called ...Most of the production increases since 2005 are the result of horizontal drilling and hydraulic fracturing techniques, notably in shale, sandstone, carbonate, and other tight geologic formations. Natural gas is produced from onshore and offshore natural gas and oil wells and from coalbeds. In 2022, U.S. dry natural gas production was about 10.8 ... The Marcellus Shale formation is one of the largest shale regions in the U.S. and is estimated to be the second largest natural gas find in the world. Two of the major shale formations are the Marcellus and Utica formations, which stretch across much of the eastern U.S. Utica Shale is a geological formation located thousandsSHALE - forms from clay(particles: <1/256mm); shale displays laminae ... For instance, diatomite made of the silica shells of diatoms can be altered and turned to ...... from, a rock made up of such grains fused together is sedimentary. Sedimentary rocks can be formed from the lithification of these buried smaller fragments ...Feb 20, 2022 · Grand Canyon’s oldest trilobites are found in the Tonto Group, which is between 525 and 505 million years old. It includes the Tapeats Sandstone, Bright Angel Shale, and Muav Limestone. These fossils are arthropods, or joint-footed animals, with a segmented body of hinged plates and shields. It can occur in various shades of green, red, black, purple, and brown. If hematite is abundant, a slate is usually reddish in color. Chlorite produces green slate, while sericite produces bluish-grey slate. Carbonaceuous materials make slate appear darker grey or black, while limonite makes it yellowish-brown.Diatomite is a sedimentary rock with many uses. It is made up of the siliceous skeletal remains of diatoms, which are tiny single-celled algae. Diatomite is crushed into a powder known as "diatomaceous earth". It is lightweight, porous, relatively inert, and has a small particle size along with a large surface area. Oil shale is an organic-rich fine-grained sedimentary rock containing kerogen (a solid mixture of organic chemical compounds) from which liquid hydrocarbons can be produced. In addition to kerogen, general composition of oil shales constitutes inorganic substance and bitumens. Based on their deposition environment, oil shales are classified as ...Limestone is a sedimentary rock composed primarily of calcite, a calcium carbonate mineral with a chemical composition of CaCO 3. It usually forms in clear, calm, warm, shallow marine waters. Limestone is usually a biological sedimentary rock, forming from the accumulation of shell, coral, algal, fecal, and other organic debris.For American frackers that survive, a light is on the horizon. Chesapeake Energy Corp filed for bankruptcy on June 28, ending the pioneer’s run leading the US shale oil and gas industry. Founded in 1989, Chesapeake binged on debt to acquire...Yes. It is made out if clay. The difference between just clay and shale is that the shale consists of compacted clay. Because of compaction, the clay particles (which are flaky) tend to align ...Fracking has been safely used in the United States since 1947. More than 1.7 million U.S. wells have been completed using the fracking process, producing more than seven billion barrels of oil and 600 trillion cubic feet of natural gas. Put simply, hydraulic fracturing is the process of injecting liquid and materials at high pressure to create ...A shale with at least 1% carbonaceous material indicating a reducing environment. A dark, thinly laminated carbonaceous shale, exceptionally rich in organic matter (5% or more carbon content) and sulfide (esp. iron sulfide, usually pyrite), and often containing unusual concentrations of certain trace elements (U, V, Cu, Ni).It is formed by partial anaerobic …The first idea that came to me was to make a cup out of the shale. It addresses the issues surrounding the water contamination problems, where — if you’re holding a cup, it’s made out of Marcellus shale and there’s water in it — you have to think about if it’s really safe to drink out of. All of the issues are in direct relation to ...Shale gas is an unconventional natural gas that is found trapped within shale formations. Since the 1990s a combination of horizontal drilling and hydraulic fracturing has made large volumes of shale gas more economical to produce, and some analysts expect that shale gas will greatly expand worldwide energy supply. Yes. It is made out if clay. The difference between just clay and shale is that the shale consists of compacted clay. Because of compaction, the clay particles (which are flaky) tend to align ...What is the difference between clay and shale? Shale is a form of sedimentary rock that is made up of clay-size particles of minerals that are rich in ...Oct 20, 2023 · What is the difference between made from, made of and made out of? Made is the past tense and past participle of the verb make . You can use made from , made out of , or made of to say that something has been produced using a substance or object, so that the original substance or object is completely changed. ... out from where the calcite comes from. We can begin by examining. Equation 4 ... the clay minerals from which shales are made. And that means we need to ...Diatomite is a sedimentary rock with many uses. It is made up of the siliceous skeletal remains of diatoms, which are tiny single-celled algae. Diatomite is crushed into a powder known as "diatomaceous earth". It is lightweight, porous, relatively inert, and has a small particle size along with a large surface area. Shale consists of at least 30 percent clay, with varying amounts of quartz, feldspar, carbonates, iron oxides, and organic matter. Oil shale or bituminous also contains kerogen, a mixture of hydrocarbons from deceased plants and animals. Shale is classified based on its mineral content.Sandstone is a sedimentary rock composed of sand-size grains of mineral, rock, or organic material. It also contains a cementing material that binds the sand grains together and may contain a matrix of silt- or clay-size particles that occupy the spaces between the sand grains. Sandstone is one of the most common types of sedimentary rock, and ...Silurian and Devonian sedimentary rocks in Oklahoma. (except for deposits in the Ouachita Basin) are limestone and dolomite overlain by black shale (Fig. 6).calcareous nannoplankton. marginal marine sequence of siltstones (reddish layers at the cliff base) and (brown rocks above), , southwestern , U.S. Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name ... The only difference between mudstone and shale is that mudstones break into blocky pieces whereas shales break into thin chips with roughly parallel tops and bottoms. Both are made of ancient mud. From the point of view of understanding the ancient conditions of sediment deposition, it is more useful to subdivide mud rocks into siltstone and ...Kerogen, complex waxy mixture of hydrocarbon compounds that is the primary organic component of oil shale. Kerogen consists mainly of paraffin hydrocarbons, though the solid mixture also incorporates nitrogen and sulfur. ... While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the ...A coral reef is made of thin layers of calcium carbonate. Coral polyps form a living mat over a calcium carbonate skeleton. Stony corals (or scleractinians) are the corals primarily responsible for laying the …Formation of oil shale has occurred in a number of environments, from fresh to saline lakes, marine basins, and in some swamps usually in association with coal ...The “massive” increase in methane emissions occurred at the same time as the use of fracking for shale gas took off in the U.S., says Robert Howarth, an ecologist at Cornell University and ...Shale. Shale is a sedimentary rock composed of very fine clay particles. Clay forms from the decomposition of the mineral feldspar. Other minerals present in shale are quartz, mica, pyrite, and organic matter. Shale forms in very deep ocean water, lagoons, lakes and swamps where the water is still enough to allow the extremely fine clay and ...Shale is not defined by its mineralogy, but because of the way it forms it is almost always made from only a handful of possible components. Shale is primarily made from clay minerals like kaolinite, illite, montmorillonite, and smectite, with significant amounts of clay-sized particles of minerals like quartz, calcite, and feldspar.Jun 20, 2022 · Oil Shale: A type of sedimentary rock composed chiefly of a combination of silt and clay. Shale may contain kerogen, a type of organic matter that yields oil and gas. Shale formations are best ... WASHINGTON, D.C. — As part of President Biden's Investing in America agenda, a key pillar of Bidenomics, the U.S. Department of Energy (DOE) today announced $7 billion to launch seven Regional Clean Hydrogen Hubs (H2Hubs) across the nation and accelerate the commercial-scale deployment of low-cost, clean hydrogen—a valuable energy product that can be produced with zero or near-zero ...Start with the straightest piece you can find, and gently peel off the bark with a knife. Rub it down with some form of oil or fat, and then hold it over a fire. Your goal is to warm it to make it more pliable so you can work it straight. The oil helps the wood heat without drying out and keeps it pliable.Pork shoulder is what sausage is made from because it has the perfect ratio of meat to fat to make the very best sausages. Shoulder meat is what a pork steak is called when it’s sliced and ...Shale Gas is a mixture of naturally occurring hydrocarbon gases that are produced from the decomposition of organic matter (plant and animal remains). It consists of 70% to 90% of Methane (CH4). Other hydrocarbons present in this gas are natural gas liquids (NGLs) like ethane, propane, and butane, and it also contains carbon dioxide, nitrogen ...5 feb 2013 ... Shale is a compressed fine-grained type of sedimentary rock. It was formed from mud silt, clay, and organic matter. Shale gas is natural gas ...Positive impacts of fracking. "The United States is in the midst of the 'unconventional revolution in oil and gas' that, it becomes increasingly apparent, goes beyond energy itself. Today, the ...The smallest grains are called clay, then silt, then sand. Grains larger than 2 millimeters are called pebbles. Shale is a rock made mostly of clay, siltstone is made up of silt-sized grains, sandstone is made of sand-sized clasts, and conglomerate is made of pebbles surrounded by a matrix of sand or mud. Biologic Sedimentary Rocks:What is shale made out of? shale, any of a group of fine-grained, laminated sedimentary rocks consisting of silt- and clay-sized particles. Shale is the most abundant of the sedimentary rocks, accounting for roughly 70 percent of this rock type in the crust of the Earth. Shales are often found with layers of sandstone or limestone.Horizontal wells in the Marcellus shale, which underground typically reach out 3,500 feet from the wellhead, now yield from 1 million Mcf to as high as 10 million Mcf or 15 million Mcf per day.Biden’s releases pulled more than 200 million barrels out of the petroleum reserve in the 10 months after Russia’s invasion of Ukraine sent international oil prices skyrocketing …Up to 33 percent of oil shale can be made of kerogen while the majority of oil shale is generally laminated rock made up mostly of clay minerals.HOUSTON (Reuters) -Four years ago, Texas oilman Scott Sheffield saw the oil majors were moving aggressively into the top U.S. shale basin and plotted to make his then-$24 billion Pioneer Natural Resources the oilfield's biggest prize. The CEO concentrated the business, exiting less productive properties and dumping an in-house service arm, and set out a mission to make Pioneer the leanest ...The merger is an all-stock transaction valued at $59.5 billion, or $253 per share, based on ExxonMobil’s closing price on October 5, 2023. Under the terms of the agreement, …Exxon Mobil agreed to buy U.S. rival Pioneer Natural Resources in an all-stock deal valued at $59.5 billion that would make it the biggest producer in the largest U.S. oilfield …Oct 26, 2022 · Hydraulic fracturing, or fracking, is a technique for recovering gas and oil from shale rock. ... pointing out that the UK's shale gas reserves are held in complex layers of rock. Lower in protein than some other options. Navitas Organic Hemp Powder is another hemp protein powder we love. Out of all the unflavored vegan protein powders, Navitas had the highest ratings for taste. It would pair especially well with a green smoothie or tropical flavors such as pineapple, mango, or coconut.Shale is a sedimentary rock formed by the compression of clay and silt particles at the bottom of a lake or sea. As other geological materials formed on top of ...Uses: This shale is the raw material for the brick manufacturing industry in Ontario. Shale samples courtesy of Hanson Brick Ltd. Slate. Rock Type: metamorphic Composition: clay minerals Original Rock: shale Environment: Slate forms from the heat and pressure when shale is buried deep in the crust. The depth of burial to make slate out of shale ...Slate is a low-grade metamorphic rock with a dull luster and strong cleavage. It is derived from shale by regional metamorphism. Slate forms when shale, which consists of clay minerals, is put under pressure with temperatures of a few hundred degrees or so. Then the clays begin to revert to the mica minerals from which they formed.Mudrocks are a class of fine-grained siliciclastic sedimentary rocks. The varying types of mudrocks include siltstone, claystone, mudstone, slate, and shale. Most of the particles of which the stone is composed are less than 1⁄16 mm (0.0625 mm; 0.00246 in) and are too small to study readily in the field. At first sight, the rock types appear ...A shale formation is a sedimentary rock composed of fine-grained detrital mineral (silt-size particles of quartz and calcite) and flakes of clay and it is characterised by the presence of about 1% to over 20% of Total Organic Carbon content (TOC). From: Journal of Natural Gas Science and Engineering, 2012 View all Topics Add to MendeleyOil shale is an organic-rich fine-grained sedimentary rock containing kerogen (a solid mixture of organic chemical compounds) from which liquid hydrocarbons can be produced. In addition to kerogen, general composition of oil shales constitutes inorganic substance and bitumens.Based on their deposition environment, oil shales are classified as marine, …shale gas, natural gas obtained from sheetlike formations of shale, frequently at depths exceeding 1,500 metres (5,000 feet). Shales are fine-grained sedimentary rocks consisting of silt- and clay-sized particles that were laid down hundreds of millions of years ago as organic-rich mud at the bottom of ancient seas and tidal flats.Over time the mud layers were buried by …Siltstone, also known as aleurolite, is a clastic sedimentary rock that is composed mostly of silt.It is a form of mudrock with a low clay mineral content, which can be distinguished from shale by its lack of fissility.. Although its permeability and porosity is relatively low, siltstone is sometimes a tight gas reservoir rock, an unconventional reservoir for natural gas that …Shale is a fine grained sedimentary rock. Shale is used in making pottery, brick, and cement. It can also be used to make oil. The origins are unknown but the word is thought to first be used in ...Kerogen, complex waxy mixture of hydrocarbon compounds that is the primary organic component of oil shale. Kerogen consists mainly of paraffin hydrocarbons, though the solid mixture also incorporates nitrogen and sulfur. ... While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the ...And so the second shale revolution largely is about building out the industrial plants starting in roughly 2013 to 2017 in order to massively expand the footprint of the American refining industry. And we added huge amounts of distillation capacity based on whose numbers you're using somewhere in the equivalent of 6 to 7 million barrels per ...This property is called fissility. Non-fissile rocks of similar composition but made of particles smaller than 1/16 mm are described as mudstones. Rocks with ...Slate is very fine-grained, made of minuscule mineral crystals invisible to the naked eye. It displays slaty cleavage and breaks easily along flat surfaces. It is usually light to dark gray but comes in many colors including green, reddish, and purple. Larger crystals of minerals like pyrite may be present. Slate.Limestone is a sedimentary rock composed primarily of calcite, a calcium carbonate mineral with a chemical composition of CaCO 3. It usually forms in clear, calm, warm, shallow marine waters. Limestone is usually a biological sedimentary rock, forming from the accumulation of shell, coral, algal, fecal, and other organic debris. A typical shale is made of clay minerals (58%), quartz (28%), feldspar (6%), carbonate minerals (5%), and iron oxides (2%). A typical mudstone like shale is usually made up of 95% organic matter. The interesting fact about shale’s composition is that this percentage is usually less than 1% of its weight.Shale gas reservoirs are found all over the world. Their endowment worldwide is estimated at 10,000 tcf by the GFREE team in the Schulich School of Engineering at the University of Calgary. ... The fractions of the total porosity made out of organic materials porosity, natural fractures and hydraulic fractures (lines 11 to 13) are very ...Jonathan Zander. Formed millions of years ago, slate and shale rocks have served as important materials throughout human history. Slate has been used in construction and household items, while shale contains petroleum and other …Shale rock is made of what 2 things? its made out of minerals. What is the difference between clay and shale? ... Clay minerals and tiny fragments of minerals like quartz and calcite make up shale ...Sep 29, 2023 · shale, any of a group of fine-grained, laminated sedimentary rocks consisting of silt- and clay-sized particles. Shale is the most abundant of the sedimentary rocks, accounting for roughly 70 percent of this rock type in the crust of the Earth. Shales are often found with layers of sandstone or limestone. When muddy sediments are buried and compacted for a long time, they form shale. When shale is buried deeper, for a longer time, and heated by the Earth's crust, it forms slate. The qualities of shale and slate vary with the makeup of the original sediments, the degree of compaction, the amount of heat and the length of time involved.What is Slate? S late is a fine-grained, foliated metamorphic rock that is created by the alteration of shale or mudstone by low-grade regional metamorphism. It is popular for a wide variety of uses such as roofing, flooring, and flagging because of its durability and attractive appearance.Limestone is a sedimentary rock composed primarily of calcite, a calcium carbonate mineral with a chemical composition of CaCO 3. It usually forms in clear, calm, warm, shallow marine waters. Limestone is usually a biological sedimentary rock, forming from the accumulation of shell, coral, algal, fecal, and other organic debris.Shale gas is a natural gas produced from shale. There are high hopes for shale gas, and some scientists expect it to greatly increase the world's supply of natural gas.Basically, shale gas is a natural gas that is present is shale rock. Shale is a rock that the gas cannot flow through easily because the shale is compact or has low permeability. Shale gas and tight gas are both unconventional, because of the elaborate production methods it takes to get them from the ground.Commercial grades of oil shale, as determined by their yield of shale oil, ranges from about 100 to 200 liters per metric ton (l/t) of rock. The U.S. Geological Survey has used a lower limit of about 40 l/t for classification of Federal oil-shale lands. Others have suggested a limit as low as 25 l/t.Mudrocks are a class of fine-grained siliciclastic sedimentary rocks. The varying types of mudrocks include siltstone, claystone, mudstone, slate, and shale. Most of the particles of which the stone is composed are less than 1⁄16 mm (0.0625 mm; 0.00246 in) and are too small to study readily in the field. At first sight, the rock types appear ...Oil shale is an organic-rich fine-grained sedimentary rock containing kerogen (a solid mixture of organic chemical compounds) from which liquid hydrocarbons can be produced. In addition to kerogen, general composition of oil shales constitutes inorganic substance and bitumens.Based on their deposition environment, oil shales are classified as marine, …Oct 26, 2022 · Hydraulic fracturing, or fracking, is a technique for recovering gas and oil from shale rock. ... pointing out that the UK's shale gas reserves are held in complex layers of rock. What is Shale. Shale is a type of clastic sedimentary rock that contains mud, flakes of clay minerals and a trace amount of other minerals. More precisely, shale is a thin layer of mudstone. Mudstones have several parallel layers of material. Shale primarily contains mud and clay. But there can be trace amounts of quartz, and calcite.Oil shale is an organic-rich fine-grained sedimentary rock containing kerogen (a solid mixture of organic chemical compounds) from which liquid hydrocarbons can be produced. In addition to kerogen, general composition of oil shales constitutes inorganic substance and bitumens. Based on their deposition environment, oil shales are classified as ... The wetting characteristics of shale rocks at representative subsurface conditions remain an area of active debate. A precise characterization of shale wettability is essential for enhanced oil and gas recovery, containment security during CO2 geo-storage, and flow back efficiency during hydraulic fracturing. While several methods were utilized …The first idea that came to me was to make a cup out of the shale. It addresses the issues surrounding the water contamination problems, where — if you’re holding a cup, it’s made out of Marcellus shale and there’s water in it — you have to think about if it’s really safe to drink out of. All of the issues are in direct relation to ...

Shale. Shale is a very fine-grained, clastic sedimentary rock which is made up mostly of clay (defined as particles smaller than 1/256 mm) and which is fissile (tending to break along natural laminations, or planes of weakness, that are less than 1 cm thick). Generally, shale occurs in thin layers or beds and represent low-energy environments .... Recently sold homes in novato ca

what is shale made out of

Currency paper has tiny red and blue synthetic fibers of various lengths evenly distributed throughout the paper. It would take 4,000 double folds, forwards and backwards, to tear a banknote. No matter the denomination, a banknote weighs approximately 1 gram. Because there are 454 grams in one pound, this means there are 454 notes in one pound ...Shale is usually soft and does not crop out unless harder rock protects it. Geologists are strict with their rules on sedimentary rocks. Sediment is divided by particle size into gravel, sand, silt, and clay. Claystone must have at least twice as much clay as silt and no more than 10% sand. It can have more sand, up to 50%, but that is called ...In its early days, the shale industry was made up of dozens of companies; by the end this decade’s M&A, there may be only 10 or so super-shale companies doing much of the drilling. That will ...Schist. A schist showing characteristic scaly schistose texture caused by platy micas. Schist ( / ˈʃɪst / SHIST) is a medium-grained metamorphic rock showing pronounced schistosity. This means that the rock is composed of mineral grains easily seen with a low-power hand lens, oriented in such a way that the rock is easily split into thin ...Oil shale - Pollution, Mining, Energy: The production of oil from shales has a potentially serious impact on the environment. Four specific areas of concern dominate discussion regarding development of the resource: greenhouse gas output, water consumption and pollution, surface disturbance, and socioeconomic effects. Because oil and gas are …Aug 9, 2023 · The shale acts like a sponge, sometimes the shale is so porous that the oil can be squeezed or sucked out, otherwise it can be extracted by crushing and heating the shale. Wiki User ∙ 15 y ago Formation of oil shale has occurred in a number of environments, from fresh to saline lakes, marine basins, and in some swamps usually in association with coal ...The most common sedimentary rock type is known as shale, made up of tiny silt or clay particles cemented together. Tiny particles are easily carried along by moving water. Thus, in uniformitarian thinking, shale particles take an inordinate amount of time to fall through a column of water and settle on the bottom, even when the water is …Feb 20, 2022 · Grand Canyon’s oldest trilobites are found in the Tonto Group, which is between 525 and 505 million years old. It includes the Tapeats Sandstone, Bright Angel Shale, and Muav Limestone. These fossils are arthropods, or joint-footed animals, with a segmented body of hinged plates and shields. Unconventional oil and natural gas play a key role in our nation's clean energy future. The U.S. has vast reserves of such resources that are commercially viable as a result of advances in horizontal drilling and hydraulic fracturing technologies.. These technologies enable greater access to oil and natural gas in shale formations.And so the second shale revolution largely is about building out the industrial plants starting in roughly 2013 to 2017 in order to massively expand the footprint of the American refining industry. And we added huge amounts of distillation capacity based on whose numbers you're using somewhere in the equivalent of 6 to 7 million barrels per ...Shale oil, in fossil fuel production, either a synthetic crude oil that is extracted from oil shale by means of pyrolysis or a naturally occurring crude oil that is extracted from underground shale deposits by means of fracking (hydraulic fracturing). In the extraction of oil from oil shales,A piece of slate about 6 cm × 4 cm (2 + 1 ⁄ 2 in × 1 + 1 ⁄ 2 in). Slate is a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade, regional metamorphism.It is the finest-grained foliated metamorphic rock. Foliation may not correspond to the original sedimentary layering, but instead ...Fracking has been safely used in the United States since 1947. More than 1.7 million U.S. wells have been completed using the fracking process, producing more than seven billion barrels of oil and 600 trillion cubic feet of natural gas. Put simply, hydraulic fracturing is the process of injecting liquid and materials at high pressure to create ...Black shale: Organic-rich black shale. Natural gas and oil are sometimes trapped in the tiny pore spaces of this type of shale. Like most rocks, the color of shale is often determined by the presence of specific materials in minor amounts. Just a few percent of organic materials or iron can significantly alter the color of a rock. Shale is a fine-grained sedimentary rock, with smaller spaces or pores containing gas, and these spaces are relatively unconnected to each other. Therefore natural gas does …Shale (Shale). Shale is a fragile, sedimentary rock that breaks into thin layers with sharp edges. It is created by the pressure applied when mud and clay are intensely compacted. Shale's primary economic value is that it contains material that can be transformed into oil or natural gas. Other shales form clays that can be made into bricks, cement, or pottery when crushed and mixed with water.shale gas, natural gas obtained from sheetlike formations of shale, frequently at depths exceeding 1,500 metres (5,000 feet). Shales are fine-grained sedimentary rocks consisting of silt- and clay-sized particles that were laid down hundreds of millions of years ago as organic-rich mud at the bottom of ancient seas and tidal flats.Over time the mud layers were buried by …A piece of slate about 6 cm × 4 cm (2 + 1 ⁄ 2 in × 1 + 1 ⁄ 2 in). Slate is a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade, regional metamorphism.It is the finest-grained foliated metamorphic rock. Foliation may not correspond to the original sedimentary layering, but instead ...Shale gas is a natural gas produced from shale. There are high hopes for shale gas, and some scientists expect it to greatly increase the world's supply of natural gas..

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