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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Asia
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oxygen
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Tertiary
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Upper Cretaceous
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Carlile Shale (1)
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Judith River Formation (1)
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Lewis Shale (1)
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Paleozoic
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Bedford Shale (1)
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Carboniferous
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Middle Mississippian
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Ramp Creek Formation (2)
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Sunbury Shale (1)
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Upper Mississippian
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Hartselle Sandstone (1)
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Salem Limestone (3)
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Parkwood Formation (1)
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Upper Carboniferous
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Chattanooga Shale (3)
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Ohio Shale (5)
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Knox Group (3)
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lower Paleozoic (2)
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New Albany Shale (20)
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Ordovician
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Saint Peter Sandstone (3)
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Trenton Group (3)
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Upper Ordovician
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Maquoketa Formation (6)
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Trentonian (3)
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Utica Shale (1)
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Permian (4)
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Silurian
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Bainbridge Formation (1)
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upper Paleozoic
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Antrim Shale (6)
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Kaskaskia Sequence (1)
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Phanerozoic (2)
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clay minerals
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illite (7)
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sulfides
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pyrite (5)
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sphalerite (2)
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zinc sulfides (1)
-
-
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Primary terms
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absolute age (3)
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Africa
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West Africa
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Ghana (1)
-
-
-
Asia
-
Far East
-
China (1)
-
-
Indian Peninsula
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India
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Maharashtra India
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Latur India (1)
-
-
-
-
-
Atlantic Ocean
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North Atlantic
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Gulf of Mexico (2)
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-
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Australasia
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Australia (1)
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bacteria
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Desulfovibrio (1)
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biogeography (4)
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bitumens (2)
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brines (12)
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Canada
-
Eastern Canada
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Maritime Provinces
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-
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Ungava (1)
-
Western Canada
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Alberta
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Alberta Basin (1)
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British Columbia (1)
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Saskatchewan (1)
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-
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carbon
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C-13 (1)
-
C-13/C-12 (12)
-
organic carbon (7)
-
-
catalogs (1)
-
Cenozoic
-
Quaternary
-
Holocene (2)
-
Pleistocene
-
upper Pleistocene
-
Weichselian
-
upper Weichselian
-
Younger Dryas (1)
-
-
-
-
-
-
Tertiary
-
Neogene
-
Miocene (1)
-
-
Paleogene
-
Oligocene
-
Frio Formation (1)
-
-
-
-
-
Chordata
-
Vertebrata
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Tetrapoda (1)
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clay mineralogy (6)
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continental drift (1)
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data processing (7)
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ground water (11)
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hydrogen
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D/H (5)
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ichnofossils (2)
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igneous rocks
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plutonic rocks
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diabase (1)
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volcanic rocks
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inclusions
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fluid inclusions (7)
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intrusions (1)
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Invertebrata
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Crustacea
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Insecta (1)
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Echinodermata
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Crinozoa
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Mollusca
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Cephalopoda
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Gastropoda (1)
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Protista
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Foraminifera
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Fusulinina
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-
isotopes
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stable isotopes
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Ar-40/Ar-36 (1)
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C-13 (1)
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C-13/C-12 (12)
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D/H (5)
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deuterium (1)
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Illinois Basin
Sulfate-reducing bacteria streamers and iron sulfides abruptly occlude porosity and increase hydraulic resistance in proppant-filled shale fractures
Geomechanical aspects of induced microseismicity during CO 2 injection in Illinois Basin
Using clay microporosity to improve formation evaluation in potential residual oil zones: Cypress Sandstone, Illinois Basin
Stress analysis using direct-S wavelets produced by a vertical vibrator
Integrated reservoir characterization of enhanced oil recovery targets in mature basins: An example from the Tar Springs Formation, Rock Hill field, Illinois Basin, United States
Analysis of Microseismicity and Reactivated Fault Size to Assess the Potential for Felt Events by CO 2 Injection in the Illinois Basin
Biomarker evidence of algal-microbial community changes linked to redox and salinity variation, Upper Devonian Chattanooga Shale (Tennessee, USA)
Detrital zircons and sediment dispersal in the eastern Midcontinent of North America
Sequence stratigraphy of the late Desmoinesian to early Missourian (Pennsylvanian) succession of southern Illinois: Insights into controls on stratal architecture in an icehouse period of Earth history
A Neognathodus -based biozonation of the Desmoinesian Series (Pennsylvanian) in the Illinois Basin, USA
Investigation of the Regional Site Response in the Central and Eastern United States
Crossroads of geology in New Harmony, with a guide to historically significant Mississippian and Pennsylvanian exposures in south central and southwestern Indiana
ABSTRACT The historic town of New Harmony is located along the Wabash River in Posey County, Indiana, and served as a focal point for natural scientists, especially geologists, in the early nineteenth century. Notable geologists that lived and worked in New Harmony during this time include Edward Travers Cox, William Maclure, Fielding Bradford Meek, Joseph Granville Norwood, David Dale Owen, Richard Dale Owen, Benjamin Franklin Shumard, Gerard Troost, and Amos Henry Worthen. Other natural scientists who worked in New Harmony include Charles Alexandre Lesueur and Thomas Say, and the town was also visited by James Hall, Leo Lesquereux, Sir Charles Lyell, and Alexander Philipp Maximilian, Prince of Wied. The purpose of this field-trip guide is to highlight the scientific and geologic enterprise that operated in nineteenth-century New Harmony, Indiana. There will be a tour of historic buildings including laboratories used by David Dale Owen, such as the Rapp-Owen Granary and his fourth laboratory, which was constructed in 1859. Furthermore, field-trip participants will visit a new geology exhibit at the Working Men’s Institute, an organization established by William Maclure in 1838. The field excursion will also visit historically significant localities, including Mississippian and Pennsylvanian exposures, the type section of the West Franklin Limestone, and a Pennsylvanian paleobotanical site that yielded extensive collections of plant fossils in the mid-nineteenth century. Finally, this field trip will provide an opportunity to discuss the importance of art to geological studies in the early nineteenth century. Specifically, hand-colored geologic maps, cross sections, and renderings of fossils were included with many of the scientific reports of historic New Harmony, and are reflected by the superb artwork of Charles Alexandre Lesueur, David Dale Owen, and Thomas Say. Access to view their original scientific artwork is possible only through special arrangement with the Working Men’s Institute.
Fault Angle Control on Potential Seismic Slip in the Illinois Basin Region
Taxonomic and evolutionary pattern revisions resulting from geometric morphometric analysis of Pennsylvanian Neognathodus conodonts, Illinois Basin
Integrated δ 13 C carb , conodont, and graptolite biochemostratigraphy of the Silurian from the Illinois Basin and stratigraphic revision of the Bainbridge Group
Proximity of Precambrian basement affects the likelihood of induced seismicity in the Appalachian, Illinois, and Williston Basins, central and eastern United States
Visualizing Precambrian basement tectonics beneath a carbon capture and storage site, Illinois Basin
Abstract: While coalbed methane (CBM) is a significant source of natural gas production globally, uncertainties regarding the proportions of biogenic and thermogenic natural gas in CBM reservoirs still remain. We integrate major gases, hydrocarbon composition, hydrocarbon stable isotopes and noble gases in fluids from 20 producing CBM wells to more accurately constrain the genetic source of natural gases in the eastern Illinois Basin, USA. Previous studies have indicated primarily biogenic production of methane (>99.6%) with negligible contributions from thermogenic natural gases. However, by integrating noble gases, we identify quantifiable (up to 19.2%) contributions of exogenous thermogenic gas in produced gases from the Seelyville and Springfield coal seams. Thermogenic gases are distinguished by a positive relationship between methane, ethane and helium-4, lower C 1 /C 2 +, heavier δ 13 C-CH 4 , more radiogenic noble gases ( 4 He, 21 Ne*, 40 Ar*), and lower abundances of atmospherically derived gases ( 20 Ne, 36 Ar). Biogenic gases displayed lighter δ 13 C-CH 4 , higher C 1 /C 2 +, higher levels of atmospheric gases and lower abundances of radiogenic noble gases. Our data suggest that natural gases from a deeper, exogenous thermogenic source likely migrated to the Pennsylvanian-aged coals at an unknown time and later mixed with biogenic methane diluting the geochemical signature of the thermogenic methane within the Springfield and Seelyville coal seams.