A black shale in southwestern Missouri, earlier called Eureka shale and Noel shale, was renamed the Chattanooga shale by Adams and Ulrich (1905) and it has been correlated with the Grassy Creek shale of northeastern Missouri by Branson (1944, p. 159). The Chattanooga shale thickens to the north and west from the outcrops in southwestern Missouri.Floyd Shale & Chattanooga Shale Gas Play In Alabama; Chattanooga Shale Natural Gas; Cline Shale (TX - Permian (Midland) Basin)(Penn) Blended Plays, "Technology Awakened Permian" (AAPG) Midland Basin Horizontal Opportunities Go Deeper; Spotlight intensifies on emerging Cline Shale; The Cline Shale.com; Cody Shale (ID, MT, WY - Bighorn ...A shallow-water origin for the Chattanooga shale-is-indicated by several circumstances-. Any deep-water hypothesis encounters serious difficulties, and the evidence commonly cited in its support is thought to be inapplicable -. Most of the black nrrud that formed the Chattanooga shale is believed to have accumulated in water 100 feetA black shale in southwestern Missouri, earlier called Eureka shale and Noel shale, was renamed the Chattanooga shale by Adams and Ulrich (1905) and it has been correlated with the Grassy Creek shale of northeastern Missouri by Branson (1944, p. 159). The Chattanooga shale thickens to the north and west from the outcrops in southwestern Missouri.Experimental investigations on pyrite synthesis indicate that before pyrite can be produced by a reaction involving ferrous iron, the disulphide ion must be formed; in experiments described the ion was obtained by the action of H2S in aqueous solution on elemental sulphur. Conditions under which the experiments were conducted indicate that pyrite will …Longo, 2009, Effective geochemical and geomechanical characterization of shale gas reservoirs from the wellbore environment: Caney and the Woodford Shale: Society of Petroleum Engineers, Annual Technical Conference and Exhibition, SPE 124231, 20 p. Lambert, M.W., 1992, Internal stratigraphy of the Chattanooga Shale in Kansas andThe Chattanooga and Pride Mountain shale samples were chosen to study the effect of salt and polyacrylamides for limiting the swelling/dispersion of shales. Chattanooga shale has a lower expandable clay and higher quartz content, which makes it hard. Conversely, Pride Mountain shale is rich in mixed and expandable clays and is soft.The Chattanooga Shale and its equivalents are widely distributed in the eastern part of North America. With its type locality in Tennessee (Hayes, 1891), the Chattanooga Shale also is found in Alabama, Kentucky, Arkansas, and eastern Oklahoma (Cooper, 1931; Conant and Swanson, 1961).Chattanooga Shale -3]. It should be noted that n[1 o Silurian rocks were present at the time of impact [1-3]. Between 1967 and 1979 Dr. David Roddy of the US Geological Survey nducted a co drilling program at Flynn Creek crater [1-3]. The project producedmore than 3.8 km of nearly continuous core from 18 separate bore holes.Chattanooga Shale- mostly shale with minor sandstone and siltstone; Clifty Limestone-thin beds of sandy fossiliferous limestone; Penters Chert-dominantly dolomite with minor chert. Approximatly 50 ft. maximum thickness. ReferencesHere, we provide high-resolution lipid biomarker chemostratigraphic records from the Upper Devonian Chattanooga Shale (Tennessee, USA) to investigate algal-microbial community changes in the ...The beds are usually cut by prominent joints creating polygonal blocks upon weathering. The upper part of the formation may be slightly sandy and usually contains abundant pyrite. The Chattanooga Shale is all Devonian in Arkansas. A lower sandstone Member (Sylamore Sandstone) may dominate or fill the Chattanooga Shale interval in some areas. Describe the environmental conditions under which the Chattanooga Shale was deposited. What problems are associated with hypotheses for the origin of this far‐ranging blanket of dark shales? Q&A. Computech Corporation is expanding rapidly and currently needs to retain all of its earnings; hence, it does not pay dividends. However, investors ...Determining facies and elements of productivity in the Devonian Chattanooga Shale in Alabama and Tennessee. Geological Society of America SE Regional Meeting 47(2) ABSTRACT. Lu, M, et al. 2015. Sedimentological and geochemical characterization reveal a major shift in depositional environments of the Devonian Chattanooga Shale in northeastern ...The Chattanooga shale is known to be one of the most radioactive black shales in the United States due to it containing uranium. This unit was explored by the Manhattan Engineer District and later, the Atomic Energy Commission, for suitable fuel for nuclear weapons and energy. The uranium content of the Chattanooga shale presents potential ...In this study, the Chattanooga Shale is divided into (ascending) Rhinestreet Shale, Upper Olentangy Shale, Ohio Shale, Bedford Shale, Berea Sandstone, and Sunbury Shale Members. Throughout most of the region, the dominant lithology is black, organic-rich shale (Rhinestreet, Ohio, and Sunbury). The Chattanooga thins westward. Chattanooga Shale and Frog Mountain Sandstone undifferentiated (In areas mapped as Dcfm one or both units may be locally absent) - Chattanooga Shale -- Brownish-black organic shale containing light to dark-gray sandstone and rare limestone interbeds near the base. Frog Mountain Sandstone -- light to dark-gray sandstone with thin dark-gray …The Woodford consists of two lithofacies, black shale and siltstone. Black shale, the most widely distributed rock type, is very radioactive and contains varvelike parallel laminae, abundant pyrite, and high concentrations of marine organic matter. Siltstone, typically a basal facies, in deep basin and proximal shelf settings, exhibits disruptedThe eastern Devonian oil shale resource can yield 400 billion (400 X 10/sup 9/) bbl of synthetic oil, if all surface and near-surface shales were strip or deep mined for above-ground hydroretorting. Experimental work, in equipment capable of processing up to 1 ton/h of shale, has confirmed the technical and economic feasibility of aboveground ...Chattanooga shale Armuchee chert Section 6P-1 Fort Payne chert Maury formation Chattanooga shale < 0.10 mr/hr Megafossils not diagnostic Conodonts of Gassaway age Section 6M-2 10 ft Fort Payne chert Maury formation Chattanooga shale . Fort Payne chert Maury formation < 0.10 mr/hr Chattanooga shale 0.10-0.15 mr/hr .006 percent equivalent uraniumThe Chattanooga Shale is separated from underlying rocks by an angular unconformity. From north to south, the Chattanooga overlaps rocks ranging in age from Middle Ordovician to Devonian (Lee, 1940). It is present in most of eastern and central Kansas, but it is absent at the northern end of the Nemaha anticline. selected for detailed study were the Pierre Shale (smectitic), Chattanooga Shale (organic rich), Green River Formation shales (carbonate rich), and the Nolichucky and Pumpkin Valley Shales (illitic). The purpose of this report is to summarize the geochemical information obtained through SERP over the last 3 years on thethe shale. The Chattanooga shale in this area ranges from 15 to 20 feet in thickness. contains no fossils, except in the upper portion~ and is so homoge- neous in appearance and so uniform J.n position as to make one of the best horizon markers of the whole region. The following section occurs in a road cut on the highway to CooperChattanooga shale General relations The Chattanooga shale is a black organic pyritiferous marine shale that is generally, very fine grained and sparsely fossiliferous. It is part of a persistent terrane of black shale deposited over much of the interior of North America during Middle Devonian, Late Devonian, and early Mississippian time.The Chattanooga Shale of Kentucky and Tennessee consists of dark-colored, chippy-weathering, marine mudshales of Late Devonian age. These black shales were deposited in a moderately deep, anoxic seafloor environment. This was a widespread lithofacies during the Late Devonian's Global Anoxia Event. The Chattanooga Shale is equivalent to the Ohio ...The Chattanooga Shale is all Devonian in Arkansas. A lower sandstone Member (Sylamore Sandstone) may dominate or fill the Chattanooga Shale interval in some areas. The Sylamore is a white to dark-gray phosphatic quartz sandstone. Its texture is fine-grained to sandy conglomerate. The formation contains few fossils, but conodonts and some ...By 2013 six natural gas drilling companies had looked at mineral rights and property leases in the Chattanooga Shale play. As of February 2013, there are fracking wells in Anderson, Campbell, Fentress, Morgan, Overton, Pickett, Scott, and Union counties in Tennessee. Atlas Energy has bought up 105,000 acres in eastern Tennessee.Middle Devonian (Eifelian) and Late Devonian to Early Mississippian (Frasnian to Kinderhookian)*. Type locality: hillside exposure at north end of Cameron Hill, Chattanooga, [Chattanooga 7.5-min quadrangle], Hamilton Co., southern TN (US geologic names lexicons, USGS Bull. 896, 1200). Standard section: cut on TN Highway 26, at east approach to ...This study examines the potential hazards to aquatic ecosystems from large-scale exploitation (190,000 Mg/day) of the Chattanooga Shale Formation, an immense reserve of oil shale and uranium in Kentucky, Tennessee, and Alabama. Using existing data on regional ecology, hydrology, mining operations, and raw and spent shale chemistry, we ...Summary: Named Chattanooga black shale. Thickness is 0 to 35 ft. In northwestern GA, underlain by the Rockwood formation and overlain by the Fort Payne …Bonar said Chattanooga shale is too fragile for the high-pressure water fracking treatment, so nitrogen gas replaces some of the water. "Nitrogen is 78 percent of our air, and it's relatively ...The Upper Devonian Chattanooga Shale of central Tennessee, a classical black shale, was deposited in an epicontinental setting, west of the Appalachian foredeep. Its finely laminated and highly carbonaceous nature is commonly interpreted to indicate deposition in comparatively deep and stagnant water. Interbeds of bioturbated greenish-gray ...USGS Publications Warehouse. Tonight I will try to present to you the chief facts we have observed that have a bearing on the old problem of how the black shales originated. Some of the ideas have been used before, and some are new.The Chattanooga Shale is a thin, but extraordinarily widespread, black or dark gray shale, which lacks fossils of bottom-dwelling invertebrates, and which contains uranium, finely disseminated pyrite and organic matter. These characteristics indicate that it accumulated in what type of depositional environment? a.The Chattanooga Shale represents the southern extent of a huge delta system that has its remnants today in the coarse red sandstones and shales of the Catskill Mountains that spread southwestward into a basin that became starved for oxygen. This delta actually began forming in New York around 400 million years ago (Late Devonian) as an extinct ...The Chattanooga shale and Maury formation, which typically have a combined thickness of about 30 to 35 ft, crop out on the steep slope between the Nashville Basin and the surrounding Highland Rim; outside the Basin they are present in several river valleys and in folded areas, Throughout most of the area studied these rocks are nearly flat lying...The Woodford is considered a 'siliceous shale' owing to the abundance of radiolarians and silicified Tasmanites, ... M.W., 1993, Internal stratigraphy and organic facies of the Devonian-Mississippian Chattanooga (Woodford) Shale in Oklahoma and Kansas, in B.J. Katz and L.M. Pratt, (eds.), Source rocks in a sequence stratigraphic framework: ...The widespread thin Chattanooga Shale (Devonian-Mississippian) of the eastern United States has been exploited. Sedimentary rock - Shale, Economic Value, Formation: Black shales are often of economic importance as sources of petroleum products and metals, and this importance will probably increase in the future. ...The Chattanooga Shale study area is located in north-central Tennessee, and encompasses portions of Anderson, Campbell, Morgan, and Scott Counties. The study area is within the Cumberland Plateau and is bounded to the east by the Pine Mountain thrust sheet and to the south by the Valley and Ridge Province (Fig. 1).The pyrite-bearing formations evaluated were the Chattanooga Shale (Devonian black shale), the Fentress Formation (coal-bearing), and the Precambrian Anakeesta Formation and similar Precambrian rocks. Conceptual models of the formation and transport of acid-rock drainage (ARD) from road cuts were developed based on the results of a literature ...At the base of the Mississippian-Pennsylvanian section is a distinctive black shale, the Chattanooga Shale, which dates to the Devonian. It is less than ten meters thick but forms a useful and distinctive marker for geologic mapping. Because of its weakness relative to the overlying limestones, low-angle thrust faults produced during folding ...A very detailed, stratigraphic column of the Chattanooga Shale Formation located in Chestnut Mound, TN, USA.This is a very good magnification of the general, stratigraphic column shown in Figure 3 ...Feb 8, 2022 · Devonian Black Shales Eastern US Chattanooga, New Albany, Ohio Shales: The Mid-Late Devonian black shales of the Appalachian, Illinois, and Michigan Basins have long been studied to provide clues to past climates, ocean ventilation, mass extinctions, and general earth history. Black carbonaceous shale, fissile. Thickness 100 to 900 feet; about 25 feet on Chilhowee Mountain. (Mapped with Mfp on West-Central and parts of East Central Sheets) State. Tennessee. Name. Chattanooga Shale. Geologic age. Mississippian and Devonian.A comparison of the organic material in the Green River Formation and the Chattanooga shale March 1989 · American Chemical Society, Division of Petroleum Chemistry, Preprints C. W. McGowanChattanooga Shale Black carbonaceous shale, fissile. Thickness 20 to 30 feet in most areas; thickens abruptly to about 100 feet near east edge of sheet. (Mapped with Mfp on West-Central sheet) Geologic unit mapped in Tennessee: Black carbonaceous shale, fissile.The equivalent Ohio shale in the Appalachian Basin eastward seems to be much deeper water, while the Chattanooga shale to the southwest along the Cincinnati Arch seems to be shallower water. Current responses include: An orthoconic …Citation Information. Geochemistry of the Chattanooga shale, Dekalb County, central Tennessee. This Upper Devonian shale is of interest because of its unusual enrichment in trace elements, especially U; a new chemical analysis for major, minor and trace elements is presented. Stable isotopes of carbon (organic) show delta 13C approx -29per ...Shale. Shale is the most abundant of all sedimentary rocks. It is composed primarily of soft clay minerals, but may include variable amounts of organic matter, calcareous material, and quartz grains. Shale may be any color, but is generally greenish gray to grayish black. It is relatively soft and has a smooth, greasy feel when freshly exposed ...The U.S. Department of Energy's Office of Scientific and Technical InformationThe most prominent shale in Kentucky is the Chattanooga (also called New Albany and Ohio) Shale, which crops out in southern Kentucky and around the Knobs Region. It is brownish black, silty, pyritic, bituminous, and carbonaceous. This Chattanooga black shale contains sufficient organic matter to burn, and several attempts have been made to ...Concentration of lead for the Chattanooga Shale in Greene County (A), the Conasuaga Shale in Shelby (B) and St. Claire County (C), the Devonian Shale in Haile County (D), and the Floyd (Neal ...The reason that the Chattanooga Shale has a high content of carbon (and uranium) is because it was deposited. in an oxygen-deficient environment. The separation between the Kaskaskia and Absaroka cratonic sequences in North America is based on the presence of. regional unconformities.The Marcellus Formation or the Marcellus Shale is a Middle Devonian age unit of sedimentary rock found in eastern North America.Named for a distinctive outcrop near the village of Marcellus, New York, in the United States, it extends throughout much of the Appalachian Basin.. The unit name usage by the U.S. Geological Survey (USGS) …Fort Payne Formation - Bedded chert; calcareous and dolomitic silicastone; minor limestone and shale; scattered lenses of crinoidal limestone. Thin green shale (Maury) at base. Average thickness about 250 feet (475 in Wells Creek area); and Chattanooga Shale - Black carbonaceous shale, fissile. Thickness 0 to 70 feet; average about 20 feet.The U.S. Department of Energy's Office of Scientific and Technical InformationThe equivalent Ohio shale in the Appalachian Basin eastward seems to be much deeper water, while the Chattanooga shale to the southwest along the Cincinnati Arch seems to be shallower water. Current responses include: An orthoconic nautiloid (cephalopod) that has been squished (favored by most respondents) ...Slightly over half of these samples are from the Chattanooga shale and its correlatives of Late Devonian age in the eastern and midcontinent areas of the United States. In central Tennessee, the upper member of the Chattanooga shale is about 15 feet thick, contains 0.006 percent uranium, and will yield about 10 gallons of oil per ton of shale.The Oklahoma equivalent to the Kansas Chattanooga Shale is the Woodford Shale, which as been a major play for shale gas. Uranium in Limestones Exceedingly high concentrations of uranium in limestones are unusual, so that the only limestone that qualifies as a commercial source of uranium is the Jurassic Todilito Limestone of New Mexico. The U.S. Department of Energy's Office of Scientific and Technical InformationThe Forest City basin had a relatively brief existence. It was formed by the warping of the post-Mississippian peneplain, and was united with the similarly formed Cherokee basin when the low divide separating them was covered by the accumulating deposits of the Cherokee shale, the earliest formation of Pennsylvanian age in Kansas.The Chattanooga Shale of the Newman Ridge syncline lies stratigraphically above the Silurian Hancock Dolomite and below the siltstone and shale of the Mississippian Grainger Formation. Core examination indicates that the Chattanooga is predominately a black shale composed of clay, finely divided carbonaceous material, and quartz.The Sharon Springs member of the Pierre shale of Cretaceous age, a hard black organic-rich shale similar to the Chattanooga shale, is radioactive throughout central and western South Dakota, most of Nebraska, northern Kansas, and northeastern Colorado. In the Missouri River valley, thin beds of the shale contain as much as 0.01 percent uranium.The Chattanooga Shale of the southern Appalachian Basin contains a diverse conodont fauna of the high Givetian, Frasnian, and Famennian. The predominantly fine-grained strata were deposited in an offshore setting where depositional packages are separated by unconformities. Conodonts allow regional and global correlation of these strata, recognition of the Frasnian-Famennian boundary, and ...Chattanooga Process is an extraction process that uses a fluidized bed reactor and an associated hydrogen -fired heater. In this process, retorting occurs at relatively low temperatures (1,000 °F or 540 °C) through thermal cracking and hydrogenation of the shale into hydrocarbon vapors and spent solids. The thermal cracking allows hydrocarbon ...and Utica shale plays. Chattanooga Eagle Ford Western Gulf TX-LA-MS Salt Basin Uinta Basin Devonian (Ohio) Marcellus Utica Bakken*** Avalo n-Bone Spring San Joaquin B asin Mo nterey Santa Maria, Ventura, Los Angeles Ba sin Monterey-Temblor Pearsa l Tuscaloosa Big Horn Basin Den ver Basin Powd erRiv Basin Park Basin Niobrara* Mowry Niobrara ...The Chattanooga Shale Gas Assessment Unit (AU) is assigned to the distal fringe of these black shale strata in the southern part of the Appalachian Basin. The AU extends south from south-central Kentucky through eastern Tennessee, northwest Georgia, northern Alabama and into eastern Mississippi.The Chengjiang Biota is the earliest most diverse animal community from the Cambrian Explosion (~518 million years ago). This biota is shown to have colonized a delta, highlighting the importance ...Fort Payne Formation - Bedded chert; calcareous and dolomitic silicastone; minor limestone and shale; scattered lenses of crinoidal limestone. Thin green shale (Maury) at base. Average thickness about 250 feet (475 in Wells Creek area); and Chattanooga Shale - Black carbonaceous shale, fissile. Thickness 0 to 70 feet; average about 20 feet. Fort Payne Formation - Bedded chert; calcareous and dolomitic silicastone; minor limestone and shale; scattered lenses of crinoidal limestone. Thin green shale (Maury) at base. Average thickness about 250 feet (475 in Wells Creek area); and Chattanooga Shale - Black carbonaceous shale, fissile. Thickness 0 to 70 feet; average about 20 feet.Fort Payne Formation - Bedded chert; calcareous and dolomitic silicastone; minor limestone and shale; scattered lenses of crinoidal limestone. Thin green shale (Maury) at base. Average thickness about 250 feet (475 in Wells Creek area); and Chattanooga Shale - Black carbonaceous shale, fissile. Thickness 0 to 70 feet; average about 20 feet.The Chattanooga Shale has a very high organic content. Without providing a source, Mr. Froede argues that the presence of organic matter is due to debris: I suggest that the Chattanooga Shale, as found in Tennessee, originated as a volcaniclastic deposit which mixed with organic debris. Conant and Swanson (1957, p. The Chattanooga shale has three members: the Hardin sand stone, the Dowelltown, and the Gassaway (youngest). The Hardin sandstone member grades into the overlying Dowelltown member. It is a local thickening of the basal sandstone bed of the Chattanooga shale, and is restricted to the vicinity of Wayne,Chattanooga Shale Dcfm: Chattanooga Shale and Frog Mountain Sandstone undifferentiated dch: Dadeville Complex; Camp Hill Granite Gneiss Dfm: Frog Mountain Sandstone dmum: Dadeville Complex; Mafic and ultramafic rock drc: Dadeville Complex; Ropes Creek Amphibolite drm:Jan 27, 2013 · The Chattanooga shale is a black to gray shale, which is exposed in many places from Alabama and Georgia to Missouri and Oklahoma, and continues in the subsurface into Kansas. Throughout Tennessee, Kentucky, Missouri, and Arkansas, the Chattanooga is 15 to 50 feet thick in most places, but formations in adjoining states with which it has been ... A sub-Chattanooga geologic map showing the areal distribution of pre-Chattanooga formations, a structure contour map on the Chattanooga shale, and a cross section across central Tennessee have been prepared to illustrate the stratigraphy and structure of the Nashville dome. The dome is shown to have been developed synchronously with mountain-building activity in Appalachia. When Appalachia was ...underlying Needmore Shale; present south west of Shenandoah County except in southwesternmost Virginia; thickness is as much as 1000 feet in north-central western Viginia. Laterally equivalent to the Marcellus Shale and Mahantango Formation to the northeast and the lower part of the Chattanooga Shale to the southwest. It is gradationalFort Payne Formation - Calcareous and dolomitic silicastone; contains bedded chert, cherty limestone, and shale; scattered crinoidal limestone lenses. Thin green shale (Maury) at base. Thickness 100 to 275 feet.; and Chattanooga Shale - Black carbonaceous shale, fissile. Thickness 20 to 30 feet in most areas.The Chattanooga Shale has a very high organic content. Without providing a source, Mr. Froede argues that the presence of organic matter is due to debris: I suggest that the Chattanooga Shale, as found in Tennessee, originated as a volcaniclastic deposit which mixed with organic debris. Conant and Swanson (1957, p.
The Chattanooga shale was examined and sampled at 7 out crop localities in Oklahoma, 10 in Arkansas, and 1 in Missouri, and samples of cores from 2 drill holes in Kansas were also collected.. How much did woolly mammoths weigh
So, shales are composed of clay-sized grains of clay minerals. Stratigraphy: unrecorded/undisclosed, but probably derived from the Chattanooga Shale, Upper ...Lambert, M.W., 1992, Internal stratigraphy of the Chattanooga Shale in Kansas and Oklahoma, in K.S. Johnson and B.J. Cardott, eds., Source rocks in the southern Midcontinent, 1990 symposium: OGS Circular 93, p. 94-105. (isopach map of the Chattanooga Shale in Kansas and Oklahoma, p. 98)May 20, 2019 · The Chattanooga Shale in this outcrop is 11.3 m thick and is subdivided here into a lower and upper unit based on lithological characteristics (Fig. 2). The lower unit is 4.3 m thick and ... Chattanooga shale Rockwood formation Os Sequatchie formation Upper part of Chickamauga limestone Reedsville shale Chickamauga limestone, unit 4 Lower and middle parts of Chickamauga limestone 00k Knox dolomite or group, undivided On Newala formation 136 Os GEOLOGICAL SURVEY 15' 139 157 158 0 Daisy 59 153 160 119 125It is a flat-lying, massive, siliceous, pyritic marine black shale, on average about 10 m thick and located at a depth from 30 to 600 m. It unconformably rests upon Leipers Limestone and is overlain by the Maury Formation. The Chattanooga Shale includes three members. Wilson and Born, 1936: 822). Figure 1 1 is a contour map by Wilson and Born showing the topographic surface on which the Chattanooga Shale was deposited and Figure 1 2 is a map by Wilson and Born ...The Chattanooga Shale ranges in thickness from 200 feet in western Lee County (Englund, 1964) to 1870 feet in northwestern Russell County (Meissner and Miller, 1981). Roen and others (1964) and Kepferle and others (1981) discussed divisions of the Chattanooga Shale and correlation with other units. Wildcat Valley Sandstone (Miller, Harris, and ...The Chattanooga Shale is a thin, but extraordinarily widespread, black or dark gray shale, which lacks fossils of bottom-dwelling invertebrates, and which contains uranium, finely disseminated pyrite and organic matter. These characteristics indicate that it accumulated in what type of depositional environment? a. back-reef. b.January 1, 1983. Black shales of Devonian age in the Appalachian basin are a unique rock sequence. The high content of organic matter, which imparts the characteristic lithology, has for years attracted considerable interest in the shales as a possible source of energy. Concurrent with periodic and varied economic exploitations of the black ... The Woodford consists of two lithofacies, black shale and siltstone. Black shale, the most widely distributed rock type, is very radioactive and contains varvelike parallel laminae, abundant pyrite, and high concentrations of marine organic matter. Siltstone, typically a basal facies, in deep basin and proximal shelf settings, exhibits disrupteda unit of the Chattanooga shale (0.0079 percent uranium), the black mud of a Norwegian fjord (0.0060 percent), an organic-rich mud from the Gotland deep of the Baltic Sea (0.0010 percent), and a phosphatic black shale of Pennsyl- vanian age (0.0050 percent). Most of the uranium in the firstFort Payne Formation - Bedded chert; calcareous and dolomitic silicastone; minor limestone and shale; scattered lenses of crinoidal limestone. Thin green shale (Maury) at base. Average thickness about 250 feet (475 in Wells Creek area); and Chattanooga Shale - Black carbonaceous shale, fissile. Thickness 0 to 70 feet; average about 20 feet.Abstract. The Chattanooga shale and Maury formation, which typically have a combined thickness of about 30 to 35 ft, crop out on the steep slope between the Nashville Basin and the surrounding Highland Rim; outside the Basin they are present in several river valleys and in folded areas, Throughout most of the area studied these rocks are nearly flat lying, but in the southeastern part they ... .
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