The physical features of a sedimentary environment include water depth and the velocity and persistence of currents. It is a common rock type which occurs mostly in carbonate rocks either in nodular form or in layers (bedded chert).. Flint on the coast at Stevns Klint in Denmark. ROCK GYPSUM: cryptocrystalline: Iron and silica, ... Carbonate Depositional Environments Most modern, and probably most ancient, carbonates are predominantly shallow water (depths <10-20 m) deposits. detrital, chemical) accumulated, governed by physical, biological, and chemical processes related to modern and applied to ancient environments, and lithified into sedimentary rock units. Chalcedony is made of microcrystalline quartz, quartz grains so tiny that they cannot be distinguished even with a standard optical microscope. The sedimentary environment is the specific depositional setting of a particular sedimentary rock and is unique in terms of physical, chemical, and biological characteristics. It has also been documented for more weathering-resistant rocks, such as quartzite, given the right conditions. Shale-A clastic rock-Breaks in thin layers = fissile For a detrital sedimentary rock that contains mudcracks, you could be confident that the environment in which it formed was _____. A depositional environment is defined as a site where sediments (e.g. As you can see from Figure 10, chemically formed sedimentary rocks like rock salt, rock gypsum and dolostone form by precipitation, which happens when the water is saturated, which is to say it contains so much of the dissolved mineral, it can’t hold anymore. A few more uses of the word are given below. A. a very high-energy environment B. subjected to oscillating currents C. dominated by marine organisms D. alternately wet and dry E. covered with abundant terrestrial vegetation Collapse Breccia: Broken rock that originates from a cavern or magma chamber collapse. If you are … Chert is a hard and compact sedimentary rock, consisting dominantly of very small quartz crystals. Depositional Environment. It is common to hear the term used when referring to a rock or rock debris made up of angular fragments. Gypsum rock is made of the mineral gypsum. Dolomite: A Mineral and a Rock "Dolomite" is a word that is used by geologists in two different ways: 1) as the name of the mineral dolomite; and, 2) as the name of a rock known as dolomite, dolostone, or dolomite rock. Rock Gypsum (Gyprock)-White, light gray, or pale red/orange-Crystalline texture-Scratched with fingernail-Seawater evaporite ... -Form in depositional environments like alluvial fans, stream channels, and rocky beaches. Depositional Environments A sedimentary environment is a geographic location characterized by a particular combination of ... 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