Sedimentary structures other than bedding and stratification are subdivided according to their origin as physical, chemical, and biological. Most sedimentary structures are physical (mechanical) in origin, that is, they are essentially primary features that form at the same time (or shortly after) a sedimentary layer is deposited (Table III).They are generated by …Mudcracks form when a shallow body of water (e.g., a tidal flat or pond or even a puddle), into which muddy sediments have been deposited, dries up and cracks. This happens because the clay in the upper mud layer tends to shrink on drying, and so it cracks because it occupies less space when it is dry. Figure 6: An example of mudcracksMud cracks and rain prints. Muddy sediment deposited in shallow water is often exposed long enough during low tides or dry seasons to dry and crack. Under the right conditions, further deposition of sediment fills in and preserves the cracks. When exposed by erosion, fossilized mud cracks may look like a honeycomb of ridges.Marine? non-marine? Mudcracks in this case suggest non-marine--sand dunes often have little mudcracked areas in between them. These are two examples where mudcracks, added to other sedimentary observations, help constrain a possible environment of deposition. Mudcracks generally form polygons with various numbers of roughly straight sides.Sep 29, 2023 · The cracks formed in an area where the ground that was once rich with clay began to contain more sulfate, Gasda explained. Researchers believe that moment represents the start of a drying out ... Mudcracks (also known as mud cracks, desiccation cracks or cracked mud) are sedimentary structures formed as muddy sediment dries and contracts. Crack formation also occurs in clay-bearing soils as a result of a reduction in water content. Fresh mudcracks Oops something went wrong: 403 Enjoying Wikiwand? Give good old Wikipedia a great new look19 Oca 2017 ... NASA said: Cracks that form at the surface, such as in drying mud, generally fill with windblown dust or sand. A different type of cracking ...The rover spotted the mud cracks in 2021 as it explored a rock target nicknamed “Pontours,” found within a transitional zone between a clay-rich layer and one higher up that is enriched with salty minerals called sulfates. While clay minerals usually form in water, sulfates tend to form as water dries up. The minerals prevalent in each area ...Name: 3 3) A complete 40 cm dinosaur, with skin impressions, in very fine-graded laminated mudstone.The layers also preserve undisturbed impressions of flowers and insects. Environment: 4) Dinosaur footprints in mud-cracked limestone with bi-directional ripple marks. Environment: 5) You discover a deposit formed by a stream. Nearly all the bones …24 Eki 2011 ... Mudcracks form when muddy sediment is exposed to the atmosphere and dries up. They have a characteristic polygonal shape when viewed from above, ...Sediment is the product of mechanical and chemical weathering and of erosion by wind, water, and ice. Biological activity also plays a role. Sediment may be deposited in the form of sand building up as a dune, or a beach as pebbles piling up in a stream, or shelves an organic matter accumulating on the ocean floor.Mudcracks (also known as mud cracks, desiccation cracks or cracked mud) are sedimentary structures formed as muddy sediment dries and contracts. Crack formation also occurs in clay …In most of the layers the cross-beds dip down toward the right, implying wind direction from right to left during deposition. One bed dips in the opposite direction, implying an abnormal wind. Cross-beds form as sediments are deposited on the leading edge of an advancing ripple or dune.11 Ağu 2023 ... Water could have been present for a time, evaporating and reappearing again until mud cracks in the shape of polygons formed. Most Read. 1 ...The cracks form due to shrinkage of the sediment as it dries. When present in rock, they indicate that the surface was exposed at the Earth’s surface and then rapidly buried. Sole marks are flutes eroded in soft sediment that can become filled with mud. Both the flutes and the resulting casts (flute casts) can be preserved in rock. fracture,patternformation,mudcracks, polygonalterrain,columnarjoints Authorforcorrespondence: ... do not cross each other, or vertices form from more than three ... A patchwork of polygon-shaped cracks in ancient Martian mud are evidence of past wet-dry cycles, which could have helped extraterrestrial life emerge on the Red Planet. Comments (4) A close-up of ...What Does Mudcracks Mean In Geology | Science-Atlas.com Sedimentary structures . Geologists use the term sedimentary structure for the layering of sedimentary rocks, for surface features on layers formed... Scientific discoveries from around the world News Astronomy Technology Space Planet Earth Animals Biology Chemistry Culture Earth Health1 What is Mudcracks and how do they form? 2 What do Mudcracks indicate? 3 What are sedimentary structures and why are they important? 4 Why does drywall mud crack when it dries? 5 What are the three most common sedimentary rocks? 6 How are ripples formed? 7 What defines a bed or layer? 8 Is it normal for drywall mud to crack?Fossilized mud cracks are really fossilized, dry mud! The unique patterns of lines are caused by agate & minerals that get trapped between cracks in the mud ...2. Mud cracks that form underwater (sub-aqueous). Syneresis is a term used by chemists to describe the separation of liquid from a gel (as in cheese making). Its importance as a process for dewatering muds has been known by geologists for over 70 years. "Syneresis cracks" are known to form in the muddy bottoms of some lakes, settling ponds, and ...Oct 21, 2023 · Geology Chapter 7. Evaporites, such as _____. Click the card to flip 👆. gypsum and halite, form when minerals that were previously dissolved in water are deposited as the water evaporates. Click the card to flip 👆. 1 / 31. The cracks form due to shrinkage of the sediment as it dries. In cross section the mudcracks tend to curl up, thus becoming a good top/bottom indicator. The presence of mudcracks indicates that the sediment was exposed at the surface shortly after deposition, since drying of the sediment would not occur beneath a body of water.Table of Contents. Sedimentary rock - Mudrocks, Clastic Rocks, Stratification: In terms of volume, mudrocks are by far the most important variety of sedimentary rock, probably constituting nearly 80 percent of Earth’s sedimentary rock column. Despite this abundance, the literature on mudrocks does not match in extent or detail that dealing ...Nov 1, 2006 · 2. Mud cracks that form underwater (sub-aqueous). Syneresis is a term used by chemists to describe the separation of liquid from a gel (as in cheese making). Its importance as a process for dewatering muds has been known by geologists for over 70 years. "Syneresis cracks" are known to form in the muddy bottoms of some lakes, settling ponds, and ... Which type of bond forms when two or more atoms share electrons? The bond is covalent. If the bond is made by transferring electrons then it is an ionic bond, but if they are sharing the it is ...Study with Quizlet and memorize flashcards containing terms like What property of water causes it to make droplets as it rains? Polarity Hydrogen bonds Adhesion Specific gravity Cohesion, What does "polar" mean, with respect to a water molecule? Dissolves better than normal water Positive and negative side Found more toward the equator Found more toward the poles More pure than normal water ...Summary. Many terrestrial sedimentary processes are not difficult to observe, describe, and interpret. Yet many of these dynamic processes are not limited to the Earth. One example is the formation of mudcracks that provide critical evidence of the presence of liquid water saturating a fine-grained sediment and then evaporating.Mudcracks (also known as mud cracks, desiccation cracks or cracked mud) are sedimentary structures formed as muddy sediment dries and contracts. Crack formation also occurs in clay-bearing soils as a result of a reduction in water content. Fresh mudcracks Oops something went wrong: 403 Enjoying Wikiwand? Give good old Wikipedia a great new lookHow do carbonate rocks form quizlet? Organisms such as coral, clams, shrimp and starfish extract dissolved ions such as calcium, magnesium, and bicarbonate from water to make shells or skeletons. Upon the death of the organism, these skeletal components are incorporated into the sediment, which is eventually cemented to …Mudcracks generally form polygons with various numbers of roughly straight sides. Mudcracks are preserved when a flood washes in sediment that fills the cracks and …Expert Answer. Shale is formed when silt and clay are compressed. It's a fine grained sedimentary rock which contains 30% …. View the full answer. Transcribed image text: OTVOJOVATOGI VUOLLIDOC And this shale contains mud cracks. What minerals comprise a shale?Mudflats protect the inland landforms from erosion. They act as a barrier to waves from eroding land in the interior. However, mudflats across the world are in danger of destruction and under extreme threat from coastal developmental activities. Dredging for navigational needs, chemical pollution, etc., are threatening the mudflat habitats.How do mudcracks form? How can mudcracks be used to determine whether a rock layer is right-side up or if it has flipped upside down? How are ancient sand dunes identified? How are rock layers that formed from sediments that were laid down underwater identified at …Mud cracks and rain prints. Muddy sediment deposited in shallow water is often exposed long enough during low tides or dry seasons to dry and crack. Under the right conditions, further deposition of sediment fills in and preserves the cracks. When exposed by erosion, fossilized mud cracks may look like a honeycomb of ridges.Expert Answer. 1. option 4. Oolitic limestones are found in warm, shallow, marine environments. 2. option 5. mud cracks are formed when the mud dries and contracts. This indicates that at some time it must have been exposed to air for the mud to be dried out. 3. o …. View the full answer.a) Loose sand grains are deposited with open pore space between the grains. b) The weight of overburden compacts the sand into a tighter arrangement, reducing pore space. c) Precipitation of cement in the pores by groundwater binds the sand into the rock sandstone, which has a clastic texture. How do evaporites form?How do evaporites form? Name two evaporites. Evaporites form from crystals that precipitate during evaporation of water (water with dissolved material in it), such as in a drying lake bed. Rock gypsum and rock salt are two evaporites. 14. Explain two ways that cross-bedding can form. Cross-bedding can form in a desert environment when sand ...Rocks are inherently fractured. Sedimentary rocks are often layered and igneous rocks have numerous fractures from contracting during cooling. These cracks open up as the rock is brought to the surface, allowing water to get in. Water expands when it freezes, causing the cracks to widen and grow.a form of matter that cannot be broken down into a chemically simpler form by heating, cooling, or chemical reactions. What are the 8 most common elements in Earth's crust? ... - evidence: mudcracks - rocks exposed to air, drying out, which means that the sediments were above sea level.Past Climates. Past Enviroments. List the three types of sedimentary rock. Clastic Chemical Biochemical. List the three steps required to form a clastic sedimentary rock. Weathering to sediment, transport of clasts, and lithification. What is a clast? rock fragment. List three agents of erosion (transport).Feb 7, 2016 · Mudcracks, when we find them preserved in sedimentary rocks tell us (I guess it seems obvious) that the environment at that time was dry, maybe hot, maybe cold. The significance of this will become apparent when we examine mudcracks and other sedimentary structures in a broader context. The broader picture – ripples and mudcracks in context Metamorphic rock, estimated to be as old as 3.8 billion years, located near Isua at Qorqut Sound, Greenland. The term “metamorphosis” is most often used in reference to the process of a caterpillar changing into a butterfly. However, the word “metamorphosis” is a broad term that indicates a change from one thing to another. Even rocks ...2. Atoll lagoons: These form due to the erosion of an extinct seamount or volcano with a fringing coral reef that continues to grow upward forming a barrier for the lagoon. (11) Figure 2: Atoll Lagoon. Wake Island. The green water surrounded by land and reef is an atoll lagoon.Oct 19, 2023 · Metamorphic rock, estimated to be as old as 3.8 billion years, located near Isua at Qorqut Sound, Greenland. The term “metamorphosis” is most often used in reference to the process of a caterpillar changing into a butterfly. However, the word “metamorphosis” is a broad term that indicates a change from one thing to another. Even rocks ... Aug 12, 2019 · They form polygonal blocks that look identical to the shape of mudcracks, but the polygons are characteristically 150-600 feet (45-180 m) across whereas typical mudcracks form polygons 4-8 inches (10-20 cm) across and large soil cracks form polygons 2-6 feet (0.5- 2 m) across. Marine? non-marine? Mudcracks in this case suggest non-marine--sand dunes often have little mudcracked areas in between them. These are two examples where mudcracks, added to other sedimentary observations, help constrain a possible environment of deposition. Mudcracks generally form polygons with various numbers of roughly straight sides.Mudcracks occur in clay-rich sediment that is submerged underwater and later dries out. Water fills voids in the clay's crystalline structure, causing the sediment grains to swell. When this waterlogged sediment begins to dry out, the clay grains shrink. ... They form at the base of a bed, the sole, and on top of the underlying bed. They can ...Note that I do not claim that this list is complete; these are simply some of the most commonly cited way-up structures. Contents. 1 Mud cracks; 2 Ripple ...Mudcracks form when a shallow body of water (e.g., a tidal flat or pond or even a puddle), into which muddy sediments have been deposited, dries up and cracks. This happens because the …Which type of bond forms when two or more atoms share electrons? The bond is covalent. If the bond is made by transferring electrons then it is an ionic bond, but if they are sharing the it is ...Mudcracks form in very fine clay material that has dried out. As the moisture is removed, the surface will split into cracks that extend a short way down into the mud. These cracks form polygons on the surface of the mud.a boundary that is man made.Naturally forming mudcracks start as wet, muddy sediment dries up and contracts. A strain is developed because the top layer shrinks while the material below stays the same size. When this strain becomes large enough, channel cracks form in the dried-up surface to relieve the strain. 1 Answer. Sorted by: 1. Mud cracks are created at the surface of mud, as the name implies. Afterwards, due to burial processes, younger sediments may fill in the cracks.One role of the United States Citizenship and Immigration Services is to process immigration forms DS 160 and N-400. The DS 160 is for people who want to apply for residency in the United States. Form N-400 is the form used for applicants f...How do mudcracks form? Mud drys up and cracks. What depositional environment are mudcracks formed in? Dry environment. Where can glaciers be found today? Greenland. Sets found in the same folder. Lab 2 Structural Geology. 19 terms. Madison_damore PLUS. Lab 3 Geologic Time. 9 terms. Madison_damore PLUS.cross bedding —inclined sedimentary structures in a horizontal unit of rock. These tilted structures are deposits from bedforms such as ripples and dunes, and they indicate that the depositional environment contained a flowing fluid (typically, water or wind) (Figure 6.60 and 6-61 ). desiccation cracks —mudcracks; irregular fracture formed ...Feb 25, 2005 · How do evaporites form? Name two evaporites. Evaporites form from crystals that precipitate during evaporation of water (water with dissolved material in it), such as in a drying lake bed. Rock gypsum and rock salt are two evaporites. 14. Explain two ways that cross-bedding can form. Cross-bedding can form in a desert environment when sand ... Conglomerate is a clastic sedimentary rock that shaped from rounded gravel and boulder sized clasts cemented or in a matrix supperted. The rounding of the clasts show that rocks have been transported a long way from their source or on a seaside tide to wave movement. The clast cement is usually calcite, silica or iron oxide but the matrix can …Preserved mud cracks could be of assistance as top-and-bottom and paleocurrent indicators. For instance, if wind-blown sand covers a layer of mud cracks, soil lithification might lead to a sedimentary top having on its base a series of ridges (i.e., the cast) combined with a sedimentary bottom retaining on its upper surface the shape of the original cracks (i.e., the mold); and if a sheetflood ...Write the correct label A, B, C, or D under each term to indicate the definition of that term. Evaporation ____. A. The change of state from a liquid to a gas B. The change of state-from a gas to a liquid C. The movement of water between the atmosphere, land, oceans, and living things. D. Any form of water that falls to Earth's surface from the ... It is clear, but not always pure water. Most water that enters the cave comes down through the joints, which connect the cave with the surface. Where there are many joints, sinkholes can form on the surface. Sinkholes act like funnels, collecting rain water from the surface and funneling it into the cave. At some caves, joints leading down from ...Ripple Mark. Ripple marks in a sediment are characteristic of deposition of the inorganic materials in shallow water and are caused by forces such as wave-related forces or wind-related forces that leave ripples of sand as typified by the marks seen on beach sand or on the bottom of a shallow stream. From: Shale Oil and Gas Production Processes ...Cracking mud. If you look at garden-variety mud after it has dried, you will usually see a network of cracks like the one shown in figure 1 a. The pattern results from the sequential growth of many individual cracks, and it provides a record of how each one grew. Mud is a mixture of soil and water.tidal flat. Which of these sedimentary structures are formed by organisms? Stromatolites, Root marks, Trails, Burrows, Tracks, and Borings. In an asymmetrical ripple the steeper side is. Down current. Burrows may be different from borings because. Burrows form and soft sediment and borings form in hard sediment.Even though sedimentary rocks can form in drastically different ways, their origin and creation have one thing in common, water. 5.1 The Unique Properties of Water . A model of a water molecule, showing the bonds between the hydrogen and oxygen. ... Mudcracks occur in clay-rich sediment that is submerged underwater and later dries out.How do mud cracks form? Formation of mudcrack . Naturally forming mudcracks start as wet muddy sediment dries up and contracts. A strain is developed because the top layer shrinks while the material below stays the same size. When this strain becomes large enough channel cracks form in the dried-up surface to relieve the strain.Mudcracks are frequently seen in ephemeral streams when they dry out after heavy rains. Mudcracks can also be found in much older rocks. This illustrates the principle of uniformitarianism, often summarized as "the present is the key to the past". Image posted: 12-17-2021.The overbank shales often contain mudcracks that form when the floods recede and the clay dries out (Fig. 5-10) and raindrop impressions. Assymetric or current ripple marks also indicate deposition in a stream. Lakes normally have muddy bottoms and perhaps a narrow shoreline of sand and gravel. Shales with fossils of fresh-water organisms are ...Dissolution is a form of weathering—chemical weathering. With this process, water that is slightly acidic slowly wears away stone. These three processes create the raw materials for new, sedimentary rocks. Precipitation and lithification are processes that build new rocks or minerals. Precipitation is the formation of rocks and minerals from ...11 Ağu 2023 ... Water could have been present for a time, evaporating and reappearing again until mud cracks in the shape of polygons formed. Most Read. 1 ...ceptively mundane question, How do mud cracks form? Cracking mud If you look at garden-variety mud after it has dried, you will usually see a network of cracks like the one shown in figure 1a. The pattern results from the sequential growth of many individual cracks, and it provides a record of how each one grew. Mud is a mixture of soil and water.Using the right mud will create the strongest seams that resist cracking. Using the right tape is also important. Traditionally, drywall seams are covered with a paper tape. A fiberglass mesh tape ...Nov 1, 2014 · Cracking mud. If you look at garden-variety mud after it has dried, you will usually see a network of cracks like the one shown in figure 1 a. The pattern results from the sequential growth of many individual cracks, and it provides a record of how each one grew. Mud is a mixture of soil and water. Multiple episodes of dessication, infilling and re-wetting may be displayed as in the Tulare core below from the Maxwell 860 well. Sub-aqueous shinkage cracks can also form, and are known as syneresis cracks. These form in limey sediments during contraction of the clay minerals in response to salinity changes in the overlying water column.Mudcracks form in very fine clay material that has dried out. As the moisture is removed, the surface will split into cracks that extend a short way down into the mud. These cracks form polygons on the surface of the mud. The top of the bed has the widest distance between the polygons and the cracks taper downwards into the bed.A. Chemical sedimentary rocks are crystalline in texture. B. Gypsum and halite are evaporite minerals. C. Both chert and limestone may have either chemical or biochemical origin. D. Dolostone and limestone are polymorphs—they have the same chemical composition. D. Dolostone and limestone are polymorphs—they have the same chemical composition.antidunes: bed topography and water-surface topography are in phase; are not subdivided by size (include both ripple and dine forms); can migrate downstream or upstream. Be able to sketch the phases of bedforms as a function of grain size and mean flow velocity. smaller grain size and lower velocity produces ripples.Mud cracks could form pre-or early-diagenetically in different environments: Krynine (1935) postulates preservation of mud cracks under humid conditions; Twenhofel (1925) reported the …How do mudcracks form? How can mudcracks be used to determine whether a rock layer is right-side up or if it has flipped upside down? How are ancient sand dunes identified? How are rock layers that formed from sediments that were laid down underwater identified at …Naturally occurring mudcracks form in sediment that was once saturated with water. Abandoned river channels, floodplain muds, and dried ponds are localities that form mudcracks. Mudcracks can also be indicative of a predominately sunny or shady environment of formation.How do mudcracks form? How can mudcracks be used to determine whether a rock layer is right-side up or if it has flipped upside down? How are ancient sand dunes identified? How are rock layers that formed from sediments that were laid down underwater identified at Capitol Reef? 2. This view shows sediment (it has not been lithified and turned into a rock yet) in a mudflow deposit. (a) What is a mudflow deposit?How do such deposits form? (b) What kind of rock will this sediment become if it is lithified? Mudflow deposits are poorly sorted mixtures of silt, boulders, organic materials and other debris. They have well defined edges and a …Potassium. magnesium. bromine. Which type of sediment undergoes the most compaction as it lithifies to sedimentary rocks. Marine mud. Study Chapter 5 geology flashcards. Create flashcards for FREE and quiz yourself with an interactive flipper.In cross-section, individual desiccation cracks form at right angles to bedding and generally taper downward (V-shaped profile) from the surface of the cracked layer. In three …The table below includes specific environments where various types of sediments are deposited and common rocks, structures, and fossils that aid in deducing the depositional environment from examining a sedimentary rock outcrop. Although this is not a complete list, it is a good introduction to depositional environments. Continental. …Mud cracks are formed by the drying and shrinking of mud exposed to air. Drying creates either polygonal shaped desiccation cracks or mud curls. They are common ...How do mud cracks form? Formation of mudcrack . Naturally forming mudcracks start as wet muddy sediment dries up and contracts. A strain is developed because the top layer shrinks while the material below stays the same size. When this strain becomes large enough channel cracks form in the dried-up surface to relieve the strain.Sep 29, 2023 · The cracks formed in an area where the ground that was once rich with clay began to contain more sulfate, Gasda explained. Researchers believe that moment represents the start of a drying out ...
Expert Answer. Shale is formed when silt and clay are compressed. It's a fine grained sedimentary rock which contains 30% …. View the full answer. Transcribed image text: OTVOJOVATOGI VUOLLIDOC And this shale contains mud cracks. What minerals comprise a shale? . Republica dominicana trujillo
Mudcracks (also known as mud cracks, desiccation cracks or cracked mud) are sedimentary structures formed as muddy sediment dries and contracts. Crack formation also occurs in clay-bearing soils as a result of a reduction in water content. Fresh mudcracks Oops something went wrong: 403 Enjoying Wikiwand? Give good old Wikipedia a great new lookplaya, (Spanish: shore or beach) , also called pan, flat, or dry lake, flat-bottom depression found in interior desert basins and adjacent to coasts within arid and semiarid regions, periodically covered by water that slowly filtrates into the ground water system or evaporates into the atmosphere, causing the deposition of salt, sand, and mud along the bottom and …15 Kas 2006 ... The second important aspect of this outcrop also has to do with the mud cracks. As described above, mud cracks form roughly rounded polygons.Use this form if you have come across a typo, inaccuracy or would like to send an edit request for the content on this page. For general inquiries, please use our contact form .mudcracks can be preserved in sedimentary rocks. These structures provide important information about depositional environments such as flow direction, climate (arid, semi-arid, or humid) and setting (e.g. fluvial, lacustrine, or marine). These structures also may indicate which direction was originally up within the rock.The key thing is that a way-up structure must be display some difference between its top and its bottom. They always look different up-side-down compared to right-side-up. In sedimentary rocks, the following way-up structures can aid the historical geologist in figuring out the paleo-“up” direction: cavity fills.Landslide Warning Signs. Springs, seeps, or saturated ground in areas that have not typically been wet before. New cracks or unusual bulges in the ground, street pavements or sidewalks. Soil moving away from foundations. Ancillary structures such as decks and patios tilting and/or moving relative to the main house.As the video is played a second time, observe the dynamics of mudcrack formation. Describe in a bullet list below steps in how mudcracks form. •. 3. Watch the ...How do mud cracks form? they form by the air getting hotter and the water in the mud evaperates. Is the earths core getting hotter or colder? The earth's core, consisting primarily of molten ...(d) Mud cracks: Mud cracks, also known as desiccation cracks or mudcracks, are polygonal cracks that form in fine-grained sedimentary rocks, such as ...Looking to customize your form submission notifications? Check out this guide to how Workflows can help you create tailored form notification emails! Trusted by business builders worldwide, the HubSpot Blogs are your number-one source for e...Helium and neon (and the other noble gases) have complete outer shells and therefore no tendency to form ionic bonds. Electrons are transferred from one atom to another to form an ionic bond. Electrons are shared between atoms to form a covalent bond. An anion has a negative charge and a cation has a positive charge.The top 5 ways to improve running form could help you increase your speed. Visit HowStuffWorks to see the top 5 ways to improve running form. Advertisement Running may be one of the most efficient, accessible ways to stay fit. It doesn't re...Nov 1, 2006 · 2. Mud cracks that form underwater (sub-aqueous). Syneresis is a term used by chemists to describe the separation of liquid from a gel (as in cheese making). Its importance as a process for dewatering muds has been known by geologists for over 70 years. "Syneresis cracks" are known to form in the muddy bottoms of some lakes, settling ponds, and ... Expert Answer. Shale is formed when silt and clay are compressed. It's a fine grained sedimentary rock which contains 30% …. View the full answer. Transcribed image text: OTVOJOVATOGI VUOLLIDOC And this shale contains mud cracks. What minerals comprise a shale?.
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