This interpretation is supported by the presence of fine, alternating laminae of light grey argillaceous limestone, or calcareous shale, and dark grey silt to sand-rich calcareous shale, as observed in thin section, and the characterization of the lithology for the vertebrate-bearing strata as an interlaminated argillaceous limestone and ...
2017-4-27 · The argillaceous partings, the darker gray limestone, on the other hand contain carbonates (66%) consisting of calcite (51%) and dolomite (16%) and quartz (22%), with a clay content of 2.4% (Illite, Kaolinite, and a trace of Montmorillonite). The porosity (n) of the Cobourg Limestone exhibits variability consistent with the heterogeneity of the ...
2020-8-7 · Consists of dark crystalline limestone at base with shaly or argillaceous limestone in upper part. Upper part is fossiliferous containing Chazyan and Blackriveran faunas (as identified by E.O. Ulrich). Unit is more than 1000 feet thick. Overlies Stones River limestone …
2018-12-1 · The Cobourg limestone is a mottled light to dark grey, very fine-to coarse-grained, very hard, fossiliferous argillaceous limestone and is characterized by a nodular fabric and bioturbated bedding surfaces with minor intraformational variation . It has high uniaxial compressive strength (UCS), very low permeability, and high chemical sorption ...
limestone, with mudstone or mudstone-wackestone texture in beds from 0.10 m to 0.40 m thick, alternating with laminar reddish limestone. Dark gray chert occurs in nodules and bands (Figure 3 C). Interbedding shale and laminar argillaceous limestone, as well as stylolites, calcite stringers and veins, and nodules of hematite are present. For
Dark blue, laminated, oolitic, argillaceous and siliceous limestone, algal limestone, and flat-pebble conglomerate; siliceous shale partings; some sandstone and dolomite; thickness 1,6000 to 1,900 feet. Elbrook Limestone Light blue, laminated, argillaceous limestone and calcareous shale; some dolomite; thickness 1,400 to possibly 3,000 feet
2016-8-16 · The Alsen Formation is a dark gray, thin-bedded, argillaceous fossiliferous limestone, cherty in places, conformably overlying the Becraft Limestone. The Alsen is up to 9 meters thick in the central Hudson Valley and represents an open marine shelf environment.
2020-9-17 · with nodules or thin nodular beds of dark, argillaceous limestone increasing in abundance upwards and laterally towards carbonate buildups; basinal to near reef Carbonate Buildup Facies Basin Facies HOLLEBEKE FORMATION: lower part of grey, yellowish-grey and brownish-grey, fine- …
2011-7-5 · Limestone, gray to reddish brown to dark reddish brown, medium fine crystalline, dense, fairly argillaceous. 670-690 - with some dark gray to black, argillaceous limestone. 690-750 - with a few interdisseminated sand grains and a fair amount of silicified brown oolites, some having been formed around the sand grains. 720-740 - with a ...
2015-7-21 · argillaceous limestone, part silty light grey coarse dolomite, dolomite and anhydrite Perdrix Formation Borsato Formation 15-60 m Cooking Lake Formation 50-60 m dark calc. shale and shaly limestone dark crystalline dolomite limestone, dolomite, anhydrite Hollebeke Formation 120-240 m limestone, dolomite, and anhydrite
2019-10-22 · Limestone, light- to dark-gray, argillaceous, contains altered meta-bentonite. Shale, greenish gray with cuneiform jointing in silicified beds, ripple marks. Siltstone, dark-brown, with chert. Lithologies are interbedded. Unit not exposed in map area due to faulting .
2016-9-13 · Argillaceous Limestone, Etc.: All varieties in the Calcite-Dolomite hoizontal column are possible here. Silica Opal, Chalcedony, Quartz: ... In additonal, these "true" graywackes typically have extremely angular grains, a pelitic matrix, and a dark color. ...
argillaceous limestone,； dolomitic limestone （ ）；； ... The platform foreslope is composed of the dark grey and celadon calcareous mudstone,siltstone,sandstone intercalated with limestone conglo...
Chambersburg Formation. Geologic age. Ordovician. Lithologic constituents. Major. Sedimentary > Carbonate > Limestone (Bed) dark-gray, cobbly, argillaceous limestone. Sedimentary > Clastic > Mudstone > Shale (Bed) abundant irregular shale partings. Minor. Metamorphic > Metaigneous > Metavolcanic some metabentonite beds present.
2009-7-1 · Mechanical properties of the argillaceous limestone rocks can be dramatically worsen by chemical deposition. Results of mechanical tests indicate that the fresh argillaceous limestone rocks have their uniaxial compressive strength (UCS) of 105 MPa, and deformation moduli (E 0) of 16 GPa.
2013-9-3 · ([1 m) grey yellow argillaceous limestone, part of the T 2b 3 member. Again, the slope face strikes E–W with an aver-age natural slope angle of 28 . When the strata are exam-ined in the gully, the bedrock dips slightly to the north. Figure 5 indicates that in the near surface strata exposed by the excavation for the highway, the rock dips to ...
argillaceous limestone,； dolomitic limestone （ ）；； limestone cliffs; limestone walls ... The platform foreslope is composed of the dark grey and celadon calcareous mudstone,siltstone,sandstone intercalated with ...
argillaceous limestone - definition - English
The limestone assumes a lens shape and the maximum thickness at the center is about 25 m (Dai et al., 2005a), which becomes thinner and pinches out to the east and west sides and changes into dark mudstone to form lateral lithologic barriers around lithologic traps.
2016-2-15 · A little above the floor of the passage is a noticeably dark, very thin, recessive-weathering interval of (presumably) argillaceous limestone. This dark layer usually has a bit of a bench developed immediately beneath it. The dark layer, plus the overlying gray limestones, are the basal Paoli Member (Girkin Limestone).
2020-8-7 · The Leipers Formation in central Tennessee consists of an argillaceous facies (various types of argillaceous limestone), granular facies (dark blue, massive, coarse-grained limestone), and pale colored facies (dark blue, pale weathering, fine-grained, dense limestone). The granular facies dominates in the western part of central TN, the ...
2015-1-1 · The Kilbryan Limestone Formation (Caldwell, 1959, Morris et al., 2003) consists of dark-grey, fine-grained argillaceous bioclastic limestone alternating with minor mudstone and some chert nodules. The lower part of the formation shows a nodular bedding, bioturbation, geopetals and …
2017-4-27 · The argillaceous partings, the darker gray limestone, on the other hand contain carbonates (66%) consisting of calcite (51%) and dolomite (16%) and quartz (22%), with a clay content of 2.4% (Illite, Kaolinite, and a trace of Montmorillonite).
2021-8-26 · Limestone, dark grey, argillaceous, becoming grey compact towards base. In the south, fine-grained with thin evenly bedded mudstone partings with many fossils; in the north becoming increasingly crinoidal and locally characterised by coarse crinoidal debris. Intercalated thin unit (up to 2.1 m thick) of black fossiliferous calcareous mudstone ...
2018-12-1 · Cobourg limestone heterogeneous matrix composed of light gray carbonate species and dark gray argillaceous species with installed four mini-port connectors. The current research will determine the differences in permeability within the individual species of the Cobourg limestone with a visual heterogeneity in order to identify the preferred ...
2020-8-7 · Consists of dark- to medium-gray, fine-grained, light-gray weathering, argillaceous limestone in beds from a few inches to about 3 feet thick; lenses of purer limestone occur in reference section (Lake Maskenozha quadrangle). Generally not well exposed. Thickness is 14 feet at type section, 11.5 feet at reference section.
Argillaceous rocks make up 50 to 95% of the section and play a key role in the formation of lithologic, mineralogic, geochemical, and thermobaric characteristics of the basin ( Buryakovsky, 1974a, 1993c, 1993d ). Following are the results of a study of argillaceous-rock cores recovered from deep onshore and offshore exploratory and producing ...
2021-8-2 · weaker dark gray argillaceous band (Selvadurai and Jenner, 201 3; Selvadurai and Giowacki, 20 1 7 ). (3) The stress-strain-strength behavior of the Cobourg limestone