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...as have been, or presently are, produced from the [[Cambro-Ordovician]], [[Ordovician]], [[Mississippian]], and [[Pennsylvanian]] in the Black Warrior basin.<ref ...merican Carbonate Bank: The Geology and Economic Resources of the Cambrian-Ordovician Sauk Megasequence of Laurentia: [http://store.aapg.org/detail.aspx?id=787 A

...merican carbonate bank: The geology and economic resources of the Cambrian-Ordovician Sauk megasequence of Laurentia ...inent during the [[Cambrian]], [[Early Ordovician]], and earliest [[Middle Ordovician]]. This laterally continuous and diverse sequence has been assigned differe

...microfossils (50 μm to [[length::2 mm]] in size) that occur in rocks of [[Ordovician]] to [[Devonian]] age. The biological affinities of chitinozoans are poorly ...are parts of the reproductive cycle of plants and range in age from [[Late Ordovician]] and [[Carboniferous]], respectively, to [[Holocene]]. Although land deriv

...ains up to 6-12 km of Pre-Cambrian Sinian to Cenozoic sediments. The Upper Ordovician to Lower Silurian Wufeng-Longmaxi Formation is widely distributed across th ...lems in the effective development of deep shale gas: a case study of Upper Ordovician Wufeng-Lower Silurian Longmaxi formations in Sichuan Basin and its peripher

| rowspan="3" | Ordovician || Upper

Examples are the Cambrian–Early Ordovician of the U.S., Early Silurian Interlake Formation of the Williston basin, and Examples of low-amplitude cycles in humid zones include Middle Ordovician peritidal sequences, Middle to Late Devonian Swan Hills–Judy Creek Format

...The white outcrops in the valley in the left foreground are tightly folded Ordovician Bighorn dolomite. .../outcrop outcrops] in the valley in the left foreground are tightly folded Ordovician Bighorn [[dolomite]].

* [[Ordovician]]-[[Silurian]] [[Glaciation]] and [[Deglaciation]] (Qusaiba shales source r ...ilurian]] [[transgression]] that was a result of the melting of the late [[Ordovician]] [[ice cap]] (Lüning et al., 2000<ref name=Luningetal2000>Lüning, S., J.

...Theron, 1995, A giant conodont with preserved muscle-tissue from the Upper Ordovician of South Africa: Nature, vol. 374, p. 800–803., 10., 1038/374800a0</ref>

...gic note: Middle Ordovician organic matter assemblages and their effect on Ordovician-derived oils]: American Association Petroleum Geologists Bulletin, v. 72, p ...cene age in Wyoming, Colorado, and Utah; and the marine Galena oil rock of Ordovician age in Illinois, Iowa, Minnesota, and Wisconsin.

...te the drilling of more than 120 petroleum wells. The Silurian-sourced and Ordovician-reservoired Risha gas field in Northeast Jordan originally had a recoverabl ...bon fields have been discovered in Jordan so far: the Silurian-sourced and Ordovician-reservoired Risha gas field in the northeastern corner of the country ([[:f

...ations_fig8-8.png|{{figure number|4}}Gas chromatogram of saturates from an Ordovician-sourced oil from the Illinois basin. From Hatch et al.;<ref name=ch08r18 /> ...ata/pg/0079/0011/1600/1631.htm Geochemical character and origin of oils in Ordovician reservoir rock, Illinois and Indiana]: AAPG Bulletin, vol. 79, p. 1631–16

...Phosphatic [[Phosphatic microfossils|conodonts]] are locally abundant from Ordovician to Triassic strata. Of the organic-walled fossils, a variety of marine grou

...09sep/BLTN05075/BLTN05075.HTM Stratigraphy and sedimentology of the Middle Ordovician Haouaz Formation (Murzuq Basin, Libya)]: AAPG Bulletin, v. 90, no. 9, p. 13 | rowspan=6 | Muruzq || Ordovician || Clastic || Memouniat || || || rowspan=6 | Mainly structural and few

...merican carbonate bank: The geology and economic resources of the Cambrian-Ordovician Sauk megasequence of Laurentia | chapter = Biostratigraphy and chronostratigraphy of the Cambrian-Ordovician great American carbonate bank

...analogy with the distribution of modern reef corals. Because of the [[Late Ordovician]] Gondwana glaciation, the lower [[Silurian]] reefs are asymmetrically dist

...reyandharper_1986>Laughrey, C. D., and J. A. Harper, 1996, Play Obe: Upper Ordovician Bald Eagle Formation fractured play, ''in'' J. B. Roen and B. J. Walker, ed .../0412/0412.htm Black shale source rocks and oil generation in Cambrian and Ordovician of the central Appalachian basin, USA]: AAPG Bulletin, v. 82, p. 412-441.</

...regional [[Silurian]] [[Evaporite|salt]] were correlated positively with [[Ordovician]] oils below the salt, without regard for the geologic problems involved in

| Michigan basin, Michigan || Low/Moderate || [[Ordovician]] || ? || Popov et al.<ref name=Popovetal_2001 /> | Risha area, Jordan || High || Ordovician || Indirect || Ahlbrandt et al.<ref name=Ahlbrandtetal_1997>Ahlbrandt, T. S

...rtino, J.A. 1998. Sequence and stratigraphy hierarquy of the Paraná Basin (Ordovician to Cretaceous), Southern Brazil. Bol. IG USP, Série Científica, v. 29, p.

....com/data/bulletns/1965-67/data/pg/0051/0010/1950/1979.htm Stony Mountain (Ordovician) and Interlake (Silurian) facies analogs of recent low-energy marine and su

...set from the Glenn Pool field in northeastern Oklahoma. The target is the Ordovician Wilcox Formation. The interpretation was done using a system called Cubic.

| Michigan basin, Michigan || Low/Moderate || [[Ordovician]] || ? || Popov et al.<ref name=Popovetal_2001 /> | Risha area, Jordan || High || Ordovician || Indirect || Ahlbrandt et al.<ref name=Ahlbrandtetal_1997>Ahlbrandt, T. S

...ated siliciclastic, chemical and volcaniclastic sediments, between the Neo-Ordovician and Late Cretaceous. Part of the accumulation time a was interspersed with ...This orogenic cycle is marked by two main collisional cycles: Famatinian (Ordovician to Devonian) and Gondwanic ([[Carboniferous]] to Triassic; Ramos<ref>Ramos,

.... Illich, and B. Horsfield, 1986, Biochemical evolutionary significance of Ordovician oils and their source: Organic Geochemistry, v. 10, p. 347-358.</ref> Where

...reflectance as an alternative to vitrinite and pyrobitumen reflectance in Ordovician and Silurian strata, Anticosti Island, Quebec, Canada]: AAPG Bulletin, vol.

...to significant biotic turnovers or even to mass extinctions (e.g., [[Late Ordovician]], Permian-Triassic boundary, [[Cretaceous]]-Cenozoic boundary). Paleogeogr ...er, E., Torvik, T. H., Feist, R., Walderhaug, H. J., and Eide, E.A., 2002, Ordovician palaeogeography with new palaeomagnetic data from the Montagne Noire (South

...servoirs of the Ordovician Ellenburger Formation in the United States, the Ordovician Red River Formation of the Williston basin, the [[Permian Basin]] carbonate .... H. Anderson, 1980, Depositional facies and porosity development in Lower Ordovician Ellenburger dolomite, Puckett field, Pecos County Texas, in R. B. Halley an

...onates and [[siliciclastic]]s, in Jurassic and Triassic carbonates, and in Ordovician siliciclastics. ...g02.jpg|Figure 2]]) and from the deep Khleisia 1 well which drilled to the Ordovician ([[:file:M106Ch12Fig05.jpg|Figure 5]]). Several east-trending extensional g

...utcrop at the base of the High Zagros thrusts.<ref name=Setudehnia_1976 /> Ordovician sediments also outcrop at Kuh-e Surmeh in Central Fars ([[:file:M106Ch14Fig

...merican carbonate bank: The geology and economic resources of the Cambrian-Ordovician Sauk Megasequence of Laurentia: AAPG Memoir 98, 504 p.</ref><ref name=Stern

..., and Trippi, M.H., 2008, Thermal maturity patterns (CAI and %Ro) in Upper Ordovician and Devonian rocks of the Appalachian Basin: a major revision of USGS Map

...ported successful horizontal tests of the Upper Devonian Genesee Group and Ordovician Utica Shale were reported by Range Resources, opening new opportunities to ...ikely transform faults created during rifting episodes in the Cambrian and Ordovician.<ref name=H&L1987 /> These faults experienced several subsequent episodes o

...e rocks for indirect BCGSs are hydrogen-rich shales such as those in the [[Ordovician]] shale in the Appalachian basin or in [[Silurian]] shales in the Middle Ea

...d reservoir heterogeneity and an example from the Ellenburger Group (Lower Ordovician) of west Texas: The Univ. of Texas Bureau of Economic Geology Report of Inv

...ition metal catalysis in the generation of petroleum: A genetic anomaly in Ordovician oils: Geochimica et Cosmochimica Acta, v. 56, p. 3851–3854, doi:10.1016/0 | Utica || Ordovician || 379 || 3.06 || 0.19 || 1.33 || 0.72 || 32 || 68 || 0.63 || 1.33 || 1.96

...omite-cementation can takes place in burrows, for example, Middle to Upper Ordovician Red River Formation, North Dakota, USA (Fig. 11H; Scholle and Ulmer-Scholle ...rvoir rock in Potwar Plateau, Pakistan (Khan et al., 1986). Middle - Upper Ordovician Red River Formation (North Dakota, USA) is producing from intercrystalline

...on in shallow area resulting into potential reservoir sand bed for example Ordovician oil- bearing glacial sands found in Algeria and Permo-[[carboniferous]] hyd

...al Meeting: Bureau of Economic Geology, November 1–2, p. 55–61.</ref>; (3) Ordovician to late Mississippian subsidence forming the Tobosa Basin<ref name=Gally>Ga ...are from Permian age reservoirs (54% from Guadalupian Series) and 26% from Ordovician, Ellenburger, through upper Pennsylvanian age reservoirs. Seventy-four perc

[[File:M97Ch1.2FG18.jpg|thumb|500px|{{figure number|18}}Database of the Ordovician Utica and Devonian Marcellus shales showing the oil crossover effect on sel Similarly, the Ordovician Utica Shale shows oil crossover in parts of New York, Pennsylvania, Ohio, a

...roleum Geologists Bulletin, v. 8, p. 94-112.</ref> Two levels in the Upper Ordovician (B3 and B4) and three levels in the Upper Silurian-Lower Devonian (D1, D2,