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Journal articles on the topic 'Geology, Stratigraphic Eocene'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 August 2024

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1

Birgenheier, L. P., M. D. Vanden Berg, P. Plink-Björklund, R. D. Gall, E. Rosencrans, M. J. Rosenberg, L. C. Toms, and J. Morris. "Climate impact on fluvial-lake system evolution, Eocene Green River Formation, Uinta Basin, Utah, USA." GSA Bulletin 132, no. 3-4 (June 19, 2019): 562–87. http://dx.doi.org/10.1130/b31808.1.

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Abstract In light of a modern understanding of early Eocene greenhouse climate fluctuations and new highly seasonal fluvial system faces models, the role of climate in the evolution of one classically-cited continental, terminal lake system is re-examined. Detailed stratigraphic description and elemental abundance data from fifteen cores and seven outcrop regions of the Green River Formation were used to construct a ∼150 km cross section across the Uinta Basin, Utah, USA. Lake Uinta in the Uinta Basin is divided into five lake phases: (1) post-Paleocene Eocene Thermal Maximum, (2) peak Eocene

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Reinhardt, Lutz, Werner von Gosen, Andreas Lückge, Martin Blumenberg, Jennifer M. Galloway, Christopher K. West, Markus Sudermann, and Martina Dolezych. "Geochemical indications for the Paleocene-Eocene Thermal Maximum (PETM) and Eocene Thermal Maximum 2 (ETM-2) hyperthermals in terrestrial sediments of the Canadian Arctic." Geosphere 18, no. 1 (January 7, 2022): 327–49. http://dx.doi.org/10.1130/ges02398.1.

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Abstract During the late Paleocene to early Eocene, clastic fluvial sediments and coals were deposited in northern high latitudes as part of the Margaret Formation at Stenkul Fiord (Ellesmere Island, Nunavut, Canada). Syn-sedimentary tectonic movements of the Eurekan deformation continuously affected these terrestrial sediments. Different volcanic ash layers occur, and unconformities subdivide the deposits into four sedimentary units. Rare vertebrate fossils indicate an early Eocene (Graybullian) age for the upper part of the Stenkul Fiord outcrop. Here, we present carbon isotope data of bulk

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3

Higgs, Karen E., Stuart Munday, Anne Forbes, Erica M. Crouch, and Matthew W. Sagar. "A geochemical and biostratigraphic approach to investigating regional changes in sandstone composition through time; an example from Paleocene–Eocene strata, Taranaki Basin, New Zealand." Geological Magazine 157, no. 9 (February 17, 2020): 1473–98. http://dx.doi.org/10.1017/s0016756819001596.

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AbstractA geochemical and biostratigraphic approach has been applied to investigate the spatial and stratigraphic variability of Palaeogene sandstones from key wells in Taranaki Basin, New Zealand. Chronostratigraphic control is predominantly based on miospore zonation, while differences in the composition of Paleocene and Eocene sandstones are supported by geochemical evidence. Stratigraphic changes are manifested by a significant decrease in Na2O across the New Zealand miospore PM3b/MH1 early Eocene zonal boundary, at approximately 53.5 Ma. The change in Na2O is associated with a decrease in

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Siyako, M., and O. Huvaz. "Eocene stratigraphic evolution of the Thrace Basin, Turkey." Sedimentary Geology 198, no. 1-2 (May 2007): 75–91. http://dx.doi.org/10.1016/j.sedgeo.2006.11.008.

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5

Carraro, Davide, Dario Ventra, and Andrea Moscariello. "Anatomy of a fluvial paleo-fan: sedimentological and architectural trends of the Paleocene–Eocene Wasatch–Colton System (western Uinta Basin, Utah, U.S.A.)." Journal of Sedimentary Research 93, no. 6 (June 30, 2023): 370–412. http://dx.doi.org/10.2110/jsr.2022.095.

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ABSTRACT Recent developments in fluvial geomorphology and sedimentology suggest that fluvial fans (also known as distributive fluvial systems) could be responsible for the accumulation of great volumes of clastic successions in continental basins. A general depositional model based on sedimentological and architectural trends has been formulated for these fluvial systems, however, their recognition in the stratigraphic record often relies on partially preserved, discontinuous successions. This study provides a sedimentological and architectural characterization of Paleogene alluvial strata of

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Galeotti, Simone, Eugenia Angori, Rodolfo Coccioni, Gabriella Ferrari, Bruno Galbrun, Simonetta Monechi, Isabella Premoli Silva, Robert Speijer, and Bruno Turi. "Integrated stratigraphy across the Paleocene/Eocene boundary in the Contessa Road section, Gubbio (central Italy)." Bulletin de la Société Géologique de France 171, no. 3 (May 1, 2000): 355–65. http://dx.doi.org/10.2113/171.3.355.

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Abstract An integrated stratigraphic study of the upper Paleocene to lower Eocene Scaglia limestones of the Contessa Road section has allowed us to identify the classical markers of the Paleocene-Eocene transition. The section provides a good magnetostratigraphic record as well as a continuous calcareous nannofossil and foraminiferal biostratigraphy. A negative Carbon Isotopic Excursion (CIE) occurs in the lower part of Chron C24r. The calibration to calcareous plankton zonation indicates that the CIE occurs in the lowermost part of calcareous nannofossil Zone NP10 and the upper part of Zone C

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Riddell, Janet. "Lithostratigraphic and tectonic framework of Jurassic and Cretaceous Intermontane sedimentary basins of south-central British Columbia1This article is one of a series of papers published in this Special Issue on the theme of New insights in Cordilleran Intermontane geoscience: reducing exploration risk in the mountain pine beetle-affected area, British Columbia." Canadian Journal of Earth Sciences 48, no. 6 (June 2011): 870–96. http://dx.doi.org/10.1139/e11-034.

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The south-central Intermontane belt of British Columbia has a complex architecture comprising late Paleozoic to Mesozoic volcanic and plutonic arc magmatic suites, marine and nonmarine clastic basins, high-grade metamorphic complexes, and accretionary rocks. Jurassic and Cretaceous clastic basins within this framework contain stratigraphy with hydrocarbon potential. The geology is complicated by Cretaceous to Eocene deformation, dismemberment, and dislocation. The Eocene to Neogene history of the southern Intermontane belt is dominated by non-arc volcanism, followed by Pleistocene to Recent gl

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Nielsen, Jan Kresten. "Commensal association of Corbula gibba (Bivalvia) and a sub-conical boring." Bulletin of the Geological Society of Denmark 45 (January 30, 1999): 135–38. http://dx.doi.org/10.37570/bgsd-1998-45-15.

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An examination of fossil and Recent right valves of the infaunal, suspensionfeeding Corbula gibba (Olivi, 1792) revealed the presence of a slender, sub- conical, unbranched boring. The boring is interpreted as the work of a commensal organism, possible a parasite. Stratigraphic range is from Eocene to Recent.

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Pomerol, Charles. "Limites evenementielles ou limites conventionnelles en stratigraphie?" Bulletin de la Société Géologique de France IV, no. 2 (March 1, 1988): 357–60. http://dx.doi.org/10.2113/gssgfbull.iv.2.357.

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Abstract Most events characterising stratigraphic boundaries span an interval of time. The boundaries are often diachronous and they may be affected by environmental conditions. Therefore, the only accurate way to define a boundary is to select a boundary stratotype which records as many paleontological, geophysical and geochemical events as possible. Conventional stratigraphic boundaries are commonly difficult to identify precisely outside the stratotype area. This is why it is necessary to use first and last appearances of diagnostic features which occur below and above the conventional boun

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10

Rasmussen, Dirk M., Brady Z. Foreman, Henry C. Fricke, Kathryn Snell, Lindsey Gipson, and Bernard Housen. "The early Paleogene stratigraphic evolution of the Huerfano Basin, Colorado." Rocky Mountain Geology 55, no. 1 (July 1, 2020): 1–26. http://dx.doi.org/10.24872/rmgjournal.55.1.1.

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ABSTRACT Sedimentary basins throughout the North American Western Interior contain a record of Late Cretaceous through Eocene deposition related to the Laramide orogeny. The typical stratigraphic progression includes an uppermost Cretaceous fluvio-deltaic geologic formation that is unconformably overlain by an alluvial or paludal Paleocene geologic formation. The Paleocene unit is usually characterized by drab overbank facies, and overlain by an interval of amalgamated fluvial sand bodies. The overlying Eocene geologic units are characterized by red bed overbank facies. These major stratigraph

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Gearon, James H., Cornel Olariu, and Ronald J. Steel. "The supply-generated sequence: A unified sequence-stratigraphic model for closed lacustrine sedimentary basins with evidence from the Green River Formation, Uinta Basin, Utah, U.S.A." Journal of Sedimentary Research 92, no. 9 (September 20, 2022): 813–35. http://dx.doi.org/10.2110/jsr.2021.096.

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Abstract Closed lakes and oceans are stratigraphically distinct systems. However, closed-lake stratigraphy is often interpreted using conventional sequence stratigraphic concepts which were generated for marine settings. As a consequence, lacustrine stratigraphy has long been vexing and applied on an ad-hoc basis. To remedy this, we present a novel, unified sequence stratigraphic model for hydrologically closed (endorheic) basins: the Supply-Generated Sequence (SGS) Model. This model was generated to interpret our outcrop-based correlation—the largest to date at ∼ 30 km—across the Sunnyside In

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Martín-Martín, Manuel, Francesco Guerrera, Alí Maaté, Rachid Hlila, Francisco Serrano, Juan C. Cañaveras, Douglas Paton, et al. "The Cenozoic evolution of the Intrarif (Rif, Morocco)." Geosphere 18, no. 2 (February 8, 2022): 850–84. http://dx.doi.org/10.1130/ges02199.1.

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Abstract This paper provides an understanding of the sedimentary-tectonic evolution of the Cenozoic strata of the El Habt and Ouezzane Tectonic Units (Intrarif, External Rif) in Morocco. New data provide information about the depositional architecture and enable a correlation of the evolution of the External Rif in Morocco with that of the Betic Cordillera in Spain and the Tunisian Tell, which provides new insights for hydrocarbon exploration in the region regarding possible source, reservoir, and seal rocks. The reconstructed Cenozoic succession was bio-chronologically defined, and the major

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Dechesne, Marieke, Ellen D. Currano, Regan E. Dunn, Pennilyn Higgins, Joseph H. Hartman, Kevin R. Chamberlain, and Christopher S. Holm-Denoma. "A new stratigraphic framework and constraints for the position of the Paleocene–Eocene boundary in the rapidly subsiding Hanna Basin, Wyoming." Geosphere 16, no. 2 (January 16, 2020): 594–618. http://dx.doi.org/10.1130/ges02118.1.

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Abstract The Paleocene–Eocene strata of the rapidly subsiding Hanna Basin give insights in sedimentation patterns and regional paleogeography during the Laramide orogeny and across the climatic event at the Paleocene–Eocene Thermal Maximum (PETM). Abundant coalbeds and carbonaceous shales of the fluvial, paludal, and lacustrine strata of the Hanna Formation offer a different depositional setting than PETM sections described in the nearby Piceance and Bighorn Basins, and the uniquely high sediment accumulation rates give an expanded and near-complete record across this interval. Stratigraphic s

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Strogen, Dominic P., Karen E. Higgs, Angela G. Griffin, and Hugh E. G. Morgans. "Late Eocene – Early Miocene facies and stratigraphic development, Taranaki Basin, New Zealand: the transition to plate boundary tectonics during regional transgression." Geological Magazine 156, no. 10 (March 11, 2019): 1751–70. http://dx.doi.org/10.1017/s0016756818000997.

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AbstractEight latest Eocene to earliest Miocene stratigraphic surfaces have been identified in petroleum well data from the Taranaki Basin, New Zealand. These surfaces define seven regional sedimentary packages, of variable thickness and lithofacies, forming a mixed siliciclastic–carbonate system. The evolving tectonic setting, particularly the initial development of the Australian–Pacific convergent margin, controlled geographic, stratigraphic and facies variability. This tectonic signal overprinted a regional transgressive trend that culminated in latest Oligocene times. The earliest influen

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Saif Ur Rehman. "Outcrop geology, microfacies analysis and depositional environments of Chorgali Formation from Bhattian and Gharaga, Southern Hazara basin Pakistan." Pakistan Journal of Science 76, no. 01 (March 1, 2024): 106–17. http://dx.doi.org/10.57041/pjs.v76i01.1089.

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In Hazara Basin, Early Eocene is represented by carbonate succession of Chorgali Formation which is mainly composed of limestone with marls and calcareous shale. Limestone is predominantly marly and argillaceous in nature. Two Stratigraphic sections of Chorgali Formation exposed at Gharaga and Bhattian villages have been completely examined and sampled for outcrop characteristics, petrography, microfacies and depositional settings. These sections have both well preserved lower and upper contacts with Early Eocene Margalla Hill limestone and Middle Eocene Kuldana Formation, respectively. The pe

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Buffetaut, Eric, and Delphine Angst. "Macrornis tanaupus Seeley, 1866: an enigmatic giant bird from the upper Eocene of England." Geological Magazine 158, no. 6 (February 5, 2021): 1129–34. http://dx.doi.org/10.1017/s0016756820001466.

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AbstractA large bone from the upper Eocene Totland Bay Formation of Hordle Cliff (Hampshire), originally described by Seeley (1866) as Macrornis tanaupus and interpreted by him as belonging to a ‘large Struthious bird’, is redescribed and illustrated for the first time. It is not a reptile bone, as previously suggested, but the proximal part of a left avian tibiotarsus. A mass estimate of 43 kg, comparable to that of an emu, suggests that it was flightless. A precise identification is difficult because of the incompleteness of the specimen, and Macrornis tanaupus should probably be considered

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Butler, Robert W. H., Henry W. Lickorish, Jamie Vinnels, and William D. McCaffrey. "Untangling the Annot sand fairway: structure and stratigraphy of the Eastern Champsaur Basin (Eocene–Oligocene), French Alps." Journal of the Geological Society 177, no. 6 (July 7, 2020): 1197–209. http://dx.doi.org/10.1144/jgs2020-015.

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Early foredeep successions can yield insight into tectonic processes operating adjacent to and ahead of fledgling orogenic belts but are commonly deformed by the same orogens. We develop a workflow towards stratigraphic understanding of these deformed basins, applied to the Eastern Champsaur Basin of the French Alps. This contains a down-system correlative of the southern-sourced (Eocene–Oligocene) Annot turbidites. These strata are deformed by arrays of west-facing folds that developed beneath the Embrunais–Ubaye tectonic allochthon. The folds vary in geometry through the stratigraphic multil

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Luan, Xiwu, and Peter Lunt. "Eocene to Miocene stratigraphic controls in the far East Java Sea: Implications for stratigraphic studies." Marine Geology 436 (June 2021): 106479. http://dx.doi.org/10.1016/j.margeo.2021.106479.

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Lillegraven, Jason A. "Stratigraphic relationships along the monoclinal eastern base of Bald Ridge and northwestern edge of Wyoming’s Bighorn Basin, U.S.A." Rocky Mountain Geology 54, no. 2 (December 1, 2019): 47–95. http://dx.doi.org/10.24872/rmgjournal.54.2.47.

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ABSTRACT This geologic study is focused on a less than 5 square-mile (ca. 13 km2) tract of public land in northwestern Wyoming, 8 miles (12.9 km) south-southwest of the small town of Clark in Park County. The study area is south of Clarks Fork of Yellowstone River along the eastern base of the topographic feature called Bald Ridge, also known structurally as Dead Indian monocline. Since the Middle Eocene, the study area has been along the northwestern margin of the Bighorn Basin. Prior to that time, the study area existed near the west–east center of the basin. Bald Ridge became elevated late

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Malone, Joshua R., John P. Craddock, and David H. Malone. "Sediment provenance and stratigraphic correlations of the Paleogene White River Group in the Bighorn Mountains, Wyoming." Mountain Geologist 59, no. 4 (November 1, 2022): 273–93. http://dx.doi.org/10.31582/rmag.mg.59.4.273.

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Detrital zircon ages for tuffaceous sandstones and conglomerates of the White River Group provide insights on Paleogene basin evolution, magmatic activity, and paleodrainage throughout the Laramide broken foreland basin system of the northern Rocky Mountains in the western United States. Nonmarine deposits of the upper Eocene-Oligocene White River Group are preserved irregularly across northern Wyoming and western South Dakota. Residual Laramide uplifts and active magmatic centers supplied clastic and volcaniclastic sediment to broad, low-relief valleys beginning around 40 Ma. Subhorizontal st

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KARIM, KAMAL H., HEMIN KOYI, MUSHIR M. BAZIANY, and KHALED HESSAMI. "Significance of angular unconformities between Cretaceous and Tertiary strata in the northwestern segment of the Zagros fold–thrust belt, Kurdistan Region, NE Iraq." Geological Magazine 148, no. 5-6 (July 8, 2011): 925–39. http://dx.doi.org/10.1017/s0016756811000471.

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AbstractIn this study, two angular unconformities are found and analysed for the first time in the Mesozoic–Cenozoic succession in the northwestern segment of the Zagros fold–thrust belt (ZFTB) in the Kurdistan Region. The first unconformity exists between Lower Cretaceous and Paleocene–Eocene rocks and the second between the Campanian Shiranish Formation and the Maastrichtian Tanjero Formation. Each of these unconformities is found in two different localities in the Zagros Imbricate Zone (i.e. the highly deformed zone immediately SW of the Zagros Suture) of the ZFTB of the Kurdistan Region ne

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Manyuk, Volodymyr V. "Geological heritage of Valerian Domger in the Middle Dnipro Region." Journal of Geology, Geography and Geoecology 32, no. 1 (April 9, 2023): 138–52. http://dx.doi.org/10.15421/112314.

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   The paper looks at the significance of the scientfic geological studies of the famous geologist Valerian Domger and their importance for the development of geotourism in the region and Ukraine in general. We analyzed his works in the historical aspect from the beginning of his work as a geological practitioner to his becoming a reseracher of stratigraphy, paleontology and lithology of sedimentary deposits and geology of Precambrian formations of the Ukrainian Shield. We focused on the geological routes he took when travelling along the lines of railroad construction, inclu

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Maurizot, Pierre. "First sedimentary record of the pre-obduction convergence in New Caledonia: formation of an Early Eocene accretionary complex in the north of Grande Terre and emplacement of the ‘Montagnes Blanches’ nappe." Bulletin de la Société Géologique de France 182, no. 6 (November 1, 2011): 479–91. http://dx.doi.org/10.2113/gssgfbull.182.6.479.

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Abstract New Caledonia lies at the northern tip of the Norfolk ridge, a continental fragment separated from the east Gondwana margin during the Late Cretaceous. Stratigraphic data for constraining the convergence that led to ophiolitic nappes being obducted over Grande Terre during the Eocene are both few and inaccurate. To try and fill this gap and determine the onset of the convergence, we investigated the lithology, sedimentology, biostratigraphy and geodynamic context of the Late Cretaceous – Palaeogene sedimentary cover-rock succession of northern New Caledonia. We were able to establish

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Fan, Majie, Ran Feng, John W. Geissman, and Christopher J. Poulsen. "Late Paleogene emergence of a North American loess plateau." Geology 48, no. 3 (January 3, 2020): 273–77. http://dx.doi.org/10.1130/g47102.1.

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Abstract The relative roles of tectonics and global climate in forming the hydroclimate for widespread eolian deposition remain controversial. Oligocene loess has been previously documented in the interior of western United States, but its spatiotemporal pattern and causes remain undetermined. Through new stratigraphic record documentation and data compilation, we reveal the time transgressive occurrence of loess beginning in the latest Eocene in the central Rocky Mountains, that expands eastward to the Great Plains across the Eocene-Oligocene transition (EOT). Our climate simulations show tha

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Karim, Kamal H., Hyam S. Daoud, and Abdulla R. H. Kuradawy. "RECORD OF KHURMALA FORMATION (LATE PALEOCENE – EARLY EOCENE) IN THE SULAIMANIAH GOVERNORATE, KURDISTAN REGION, NORTHEAST IRAQ." Iraqi Geological Journal 51, no. 1 (June 30, 2018): 34–55. http://dx.doi.org/10.46717/igj.51.1.3ms-2018-06-25.

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The present study focuses on the field, petrography and stratigraphic analyses of a thick and sparsely fossiliferous dolomitic limestone succession in the west, north, and northwest of Darbandikhan town from Sulaimaniah governorate. The succession thins toward northwest and east and located in the stratigraphic position of and Khurmala (or Sinjar) Formation (Late Paleocene – Early Eocene) between Kolosh and Gercus formations at the base and top respectively. The Khurmala Formation is a lagoonal crystallized limestone, dolomite with interbeds of different clastic rocks. It also contains an occa

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Passchier, Sandra, Daniel J. Ciarletta, Triantafilo E. Miriagos, Peter K. Bijl, and Steven M. Bohaty. "An Antarctic stratigraphic record of stepwise ice growth through the Eocene-Oligocene transition." Geological Society of America Bulletin 129, no. 3-4 (October 18, 2016): 318–30. http://dx.doi.org/10.1130/b31482.1.

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Wang, Jianqiao, and Piret Plink-Björklund. "Stratigraphic complexity in fluvial fans: Lower Eocene Green River Formation, Uinta Basin, USA." Basin Research 31, no. 5 (March 13, 2019): 892–919. http://dx.doi.org/10.1111/bre.12350.

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Berry, Keith. "Icacinaceae in the early middle Paleocene Raton Formation, Colorado." Mountain Geologist 55, no. 2 (April 2018): 75–86. http://dx.doi.org/10.31582/rmag.mg.55.2.75.

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Icacinicaryites corruga is reported from the upper coal zone of the Raton Formation in south-central Colorado. Prior to this report, this endocarp imprint was known from only a single locality near Pagosa Springs in southwestern Colorado (Animas Formation). This demonstrates that Icacinaceae, which characterized the late Paleocene – early Eocene tropical rainforests of western North America, already were present in Colorado’s early middle Paleocene tropical rainforest. This determination agrees with the results of a reevaluation of the stratigraphic distribution of previous records of Icacinac

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Chalouan, Ahmed, Andre Michard, Hugues Feinberg, Raymond Montigny, and Omar Saddiqi. "The Rif mountain building (Morocco); a new tectonic scenario." Bulletin de la Société Géologique de France 172, no. 5 (September 1, 2001): 603–16. http://dx.doi.org/10.2113/172.5.603.

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Abstract The building of the Alpine Rif belt (southern limb of the Betic-Rif orocline) is restored, mostly based on the Tertiary stratigraphic and metamorphic data set. The Betic-Rif Internal zones derive from an exotic Alboran Terrane partly involved in a S-dipping Betic subduction during the Late Cretaceous ?-Eocene. Incipient collision of the terrane against Iberia triggered back-thrust tectonics south of the Internal mountain belt during the latest Eocene-Oligocene. A N-dipping Maghrebian subduction developed from that time up to Middle Miocene, responsible for the rifting of the internal

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Stassen, Peter, Christian Dupuis, Etienne Steurbaut, Johan Yans, Jean-Yves Storme, Abdel-Mohsen Morsi, Paola Iacumin, and Robert P. Speijer. "Unraveling the Paleocene-Eocene thermal maximum in shallow marine Tethyan environments: the Tunisian stratigraphic record." Newsletters on Stratigraphy 46, no. 1 (April 1, 2013): 69–91. http://dx.doi.org/10.1127/0078-0421/2013/0028.

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Hamon, Youri, Remy Deschamps, Philippe Joseph, Daniel Garcia, and Emmanuelle Chanvry. "New insight of sedimentological and geochemical characterization of siliciclastic-carbonate deposits (Alveolina Limestone Formation, Graus-Tremp basin, Spain)." Bulletin de la Société Géologique de France 187, no. 3 (May 1, 2016): 133–53. http://dx.doi.org/10.2113/gssgfbull.187.3.133.

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Abstract This article is a first attempt of combining sedimentological analysis and geochemical systematics of the Alveolina Limestone Formation as a tool to identify the major stratigraphic surfaces, and to improve the sequence stratigraphy interpretation. This formation is Early Eocene in age and crops out in several well-exposed cliffs in the Serraduy – Roda de Isabena area (Graus-Tremp basin, NE Spain). Within this succession, nineteen carbonate and siliciclastic facies have been identified and grouped in environmental facies associations (based on their vertical stacking and lateral relat

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Brown, Stewart. "Stratigraphy of the oil and gas reservoirs: UK Continental Shelf." Geological Society, London, Memoirs 14, no. 1 (1991): 9–18. http://dx.doi.org/10.1144/gsl.mem.1991.014.01.02.

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The petroliferous sedimentary basins of the UK Continental Shelf are remarkable for the diversity of their reservoir strata. Reservoir rocks in fields currently in production range in age from Devonian to earliest Eocene, but significant hydrocarbon discoveries have also been made in rocks as as young as the mid-Eocene. The reservoirs are predominantly siliciclastic rocks, with facies ranging from continental fluvial and aeolian, to marine gravity flow deposits from sub-wave base environments.In this paper stratigraphic context of the producing horizons in the UK Continental Shelf (UKCS), prin

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Wang, Bing, Harry Doust, and Jingyan Liu. "Geology and Petroleum Systems of the East China Sea Basin." Energies 12, no. 21 (October 26, 2019): 4088. http://dx.doi.org/10.3390/en12214088.

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The back-arc East China Sea Basin lies on extended continental crust at the leading edge of the Eurasian plate. In this study, the basins are described and subdivided according to their tectono-stratigraphic evolution. In order to distinguish between different phases of deformation in basin development, standard basin evolution patterns related to geodynamic drivers are identified as a first step. On the basis of this, standard patterns are recognized in the sedimentary sequences that characterize the area and its tectonic evolution, and linking them to the petroleum systems present is attempt

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Hupp, Brittany N., D. Clay Kelly, James C. Zachos, and Timothy J. Bralower. "Effects of size-dependent sediment mixing on deep-sea records of the Paleocene-Eocene Thermal Maximum." Geology 47, no. 8 (May 31, 2019): 749–52. http://dx.doi.org/10.1130/g46042.1.

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Abstract Stratigraphic features of the carbon isotope excursion (CIE) marking the Paleocene-Eocene Thermal Maximum (PETM; ca. 55.8 Ma) are used to study ocean-climate change and carbon cycling during this ancient global warming event. Yet discrepancies in its timing and amplitude exist between bulk-carbonate and planktic-foraminifera δ13C records. Here we examine these disparities through the lens of δ13C compositions of size-segregated planktic shells across the pre-CIE to CIE transition in the iconic PETM section of Ocean Drilling Program Site 690 in the Weddell Sea. Our results show that th

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Ma, Bingshan, Jiafu Qi, and Jiawang Ge. "Development of two-phase transfer zones during multiphase rifting and their influence on sedimentation in the Baxian Sag, Bohai Bay Basin, northern China." Geological Magazine 156, no. 11 (April 3, 2019): 1821–38. http://dx.doi.org/10.1017/s0016756819000190.

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AbstractWe investigate the formation and deformation of transfer zones and their impact on sedimentation during multiphase rifting using a three-dimensional seismic dataset in the Baxian Sag, the onshore part of the Bohai Bay Basin, northern China. The fault system in the study area is dominated by two arcuate, opposing boundary faults, that is, the Niudong and Maxi faults, which form an S-type fault system which does not link together. The fault system and structural-stratigraphic features between the Eocene and Oligocene syn-rift sequences were distinctly different during the Palaeogene rift

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Gupta, S., and P. A. Allen. "Implications of foreland paleotopography for stratigraphic development in the Eocene distal Alpine foreland basin." Geological Society of America Bulletin 112, no. 4 (April 1, 2000): 515–30. http://dx.doi.org/10.1130/0016-7606(2000)112<515:iofpfs>2.0.co;2.

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Mehdi Hadi, Mehdi, and Felix Schlagintweit. "COMMENTS ON “NEW BIOSTRATIGRAPHY AND MICROFACIES ANALYSIS OF EOCENE JAHRUM FORMATION (SHAHREKORD REGION, HIGH ZAGROS, WEST IRAN). A CARBONATE PLATFORM WITHIN THE NEO-TETHYS OCEANIC REALM” BY BABAZADEH AND CLUZEL [BSGF (2023)]." Acta Palaeontologica Romaniae, no. 20 (2) (April 6, 2024): 17–24. http://dx.doi.org/10.35463/j.apr.2024.02.03.

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Babazadeh & Cluzel (2023) studied two stratigraphic sections from the Eocene deposits of the southwest of Shahrekord region (Zagros region, Iran). According to the biostratigraphic ranges of larger benthic foraminifera, the authors suggested in total three assemblage zones assigned to the Ypresian-Bartonian and Bartonian. In a previous contribution, Babazadeh (2022) described three new species of agglutinated conical foraminifera from the Eocene biostratigraphic framework in the Mahallat region of central Iran. It is demonstrated herein that the identified larger benthic foraminifera in bo

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Aubry, Marie-Pierre. "Where should the Global Stratotype Section and Point (GSSP) for the Paleocene/Eocene boundary be located?" Bulletin de la Société Géologique de France 171, no. 4 (July 1, 2000): 461–76. http://dx.doi.org/10.2113/171.4.461.

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Abstract The Working Group (WG) on the Paleocene/Eocene (P/E) boundary will soon have to submit a formal proposal regarding the selection of a GSSP for the boundary. Before it proceeds, a number of critical points must be considered. First, there has been dual definition of the Paleocene/Eocene boundary so that even today the boundary is placed at two different lithostratigraphic horizons by marine and vertebrate paleontologists. The former use the base of the Ypresian Stage = Mont Heribu Member in the Belgium Basin whereas the latter use the Conglomerat de Meudon believed until recently to li

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Maziqa, Falah, Maher Mahdi, and Abbas Mohammed. "Middle Eocene Succession of Dammam Formation, Biostratigraphy and Microfacies Study, North Karbala Area, Western Iraq." Iraqi Geological Journal 56, no. 2A (July 31, 2023): 211–24. http://dx.doi.org/10.46717/igj.56.2a.16ms-2023-7-25.

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Stratigraphic and sedimentary study to Dammam Formation (Eocene age) at well Kr-1, Karbala Government, Western Desert of Iraq. Lithologically, Dammam Formation consists of Nummulitic limestone and dolomitic limestone. The contact between the upper and lower of Dammam Formation is unconformable, the lower contact is represented by Umm Er-Radhuma Formation by the unconformable surface in the Upper Paleocene age, while the upper is an unconformable surface with Euphrates Formation in the Early Miocene age. The rock section of the well Kr-1 is divided into several beds depending on Petrographical

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De Man, E., L. Ivany, and N. Vandenberghe. "Stable oxygen isotope record of the Eocene-Oligocene transition in the southern North Sea Basin: positioning the Oi-1 event." Netherlands Journal of Geosciences - Geologie en Mijnbouw 83, no. 3 (September 2004): 193–97. http://dx.doi.org/10.1017/s0016774600020266.

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AbstractPreliminary stable oxygen isotope data are presented from the southern North Sea Basin successions, ranging from the Lutetian to Rupelian. Analyses were performed on fish otoliths, nuculid bivalves and benthic foraminifera and are presented as bulk δ18O values relative to a well established regional sequence stratigraphic framework. The most significant positive shift in δ18O values clearly falls at the top of the regionally recognised Bassevelde 3 sequence, which base corresponds to the Eocene-Oligocene GSSP boundary. The here documented δ18O shift is closely associated with the base

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Shahid Ghazi, Sadaf Sharif, Tehseen Zafar, Muhammad Riaz, Rashid Haider, and Tanzeela Hanif. "Sedimentology and Stratigraphic Evolution of the Early Eocene Nammal Formation, Salt Range, Pakistan." Stratigraphy and Geological Correlation 28, no. 7 (December 2020): 745–64. http://dx.doi.org/10.1134/s0869593820070047.

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Zellman, Kristine L., Piret Plink-Björklund, and Henry C. Fricke. "Testing hypotheses on signatures of precipitation variability in the river and floodplain deposits of the Paleogene San Juan Basin, New Mexico, U.S.A." Journal of Sedimentary Research 90, no. 12 (February 18, 2021): 1770–801. http://dx.doi.org/10.2110/jsr.2020.75.

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ABSTRACTMuch progress has been made in recent years towards a set of recognition criteria for river discharge variability in river channel deposits, and thus sedimentary proxies for precipitation variability. Despite this progress, there is currently no consensus on how different styles of discharge variability are reflected in river sedimentary records, and whether variable-discharge river records from different climate types can be distinguished. Herein, river discharge and precipitation variability in the Paleogene is investigated using associations between river channel and floodplain depo

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Cai, Fulong, Lin Ding, Qinghai Zhang, Devon A. Orme, Honghong Wei, Jinxiang Li, Ji’en Zhang, Than Zaw, and Kyaing Sein. "Initiation and evolution of forearc basins in the Central Myanmar Depression." GSA Bulletin 132, no. 5-6 (October 14, 2019): 1066–82. http://dx.doi.org/10.1130/b35301.1.

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Abstract The forearc basin in Myanmar is significant in understanding the development of continental forearc basins. We present stratigraphic, sandstone petrographic, and U-Pb detrital data from Upper Cretaceous–Eocene strata of Chindwin and Minbu sub-basins in the Central Myanmar Depression. The Upper Cretaceous lower Kabaw Formation consists of turbiditic conglomerate, sandstone, and mudstone in the Minbu sub-basin. The composition of conglomerates are mainly schist and subordinate quartz. Prominent detrital zircon age probability peaks are between 260 and 223 Ma, similar with that of Upper

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Yaseen, Muhammad, Muhammad Shahab, Zeeshan Ahmad, Rehman Khan, Syed Farhan Ali Shah, and Abbas Ali Naseem. "Insights into the structure and surface geology of balanced and retrodeformed geological cross sections from the Nizampur basin, Khyber Pakhtunkhwa, Pakistan." Journal of Petroleum Exploration and Production Technology 11, no. 6 (May 9, 2021): 2561–71. http://dx.doi.org/10.1007/s13202-021-01180-8.

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AbstractThe current research work is an attempt to apply the basic geological procedures, methods of geological mapping, surface and subsurface interpretation and restoration of balanced and retrodeformed cross sections from the Nizampur basin, Khyber Pakhtunkhwa, Pakistan. The work also includes the documentation of several surface structural features, i.e., anticlines, synclines and different types of folds and faults exposed in the vicinity of study area. Four central thrust faults were recognized named as Kahi Thrusts along the cross sections. These thrust faults carried the older sequence

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Hussein, Mohammad Ali, Mohammad Alqudah, and Olaf G. Podlaha. "Ichnofabrics of Eocene oil shales from central Jordan and their use for paleoenvironmental reconstructions." GeoArabia 19, no. 1 (January 1, 2014): 85–112. http://dx.doi.org/10.2113/geoarabia190185.

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ABSTRACT The study of trace fossils is widely used in facies interpretation. It provides a crucial tool for reconstructing depositional paleoenvironments when used in combination with other sedimentological and paleontological proxies. Here we present the first detailed study of Eocene trace fossils from Jordan. Two sections of Early to Middle Eocene age, with a total thickness of 478.7 m, from central Jordan were cored and investigated. The results of individually occurring (isolated) or co-occurring (combined) ichnofabrics and bioturbation levels, in combination with results from biostratigr

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Hart, Bruce, and Scott Cooper. "Mechanical stratigraphy in Mesozoic rocks of the San Juan Basin: Integration of stratigraphic and structural terms and concepts." Mountain Geologist 58, no. 2 (April 1, 2021): 159–204. http://dx.doi.org/10.31582/rmag.mg.58.2.159.

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We characterize relationships between stratigraphy and natural fractures in outcrops of Mesozoic strata that rim the San Juan Basin in New Mexico and Colorado. These outcrops expose fluvial and shallow-marine siliciclastic deposits and calcareous mudstones deposited in a distal marine setting. We focus primarily on a regionally extensive fracture set formed during the Eocene to minimize localized tectonic effects on fracture development. Where possible, we supplement our observations with wireline log- or laboratory-derived measurements of rock properties. Our goals are twofold: 1) to illustra

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McPhee, Peter J., Douwe J. J. van Hinsbergen, and Stuart N. Thomson. "Thermal history of the western Central Taurides fold-thrust belt: Implications for Cenozoic vertical motions of southern Central Anatolia." Geosphere 15, no. 6 (November 7, 2019): 1927–42. http://dx.doi.org/10.1130/ges02164.1.

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Abstract The modern physiography of central Turkey is dominated by the 1-km-high Central Anatolian Plateau and the Central Tauride mountains that form the southern plateau margin. These correspond to a Cretaceous–Eocene backarc extensional province and forearc fold-thrust belt, respectively. The extent to which the morphology of the Miocene plateau was inherited from the physiography of the Cretaceous–Eocene subduction zone that assembled the Anatolian crust has not been tested but is important if we are to isolate the signal of Miocene and younger subduction dynamics in the formation of the m

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Gómez, Manuel, Jaume Vergés, and Carlos Riaza. "Inversion tectonics of the northern margin of the Basque Cantabrian Basin." Bulletin de la Société Géologique de France 173, no. 5 (September 1, 2002): 449–59. http://dx.doi.org/10.2113/173.5.449.

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Abstract The northern margin of the Basque-Cantabrian Basin was analysed combining stratigraphic and structural data from both surface and subsurface together with reflectance of vitrinite data from oil wells. The use of cross-section balancing techniques in addition to thermal modelling enabled us to reconstruct the tectonic, burial and thermal evolutions of the basin margin as well as those of the Landes High to the N in two different periods. The section restoration at the end of the Cretaceous shows a northern basin margin structure influenced by evaporites related to south-dipping normal

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Cherchi, Antonietta, Nicoletta Mancin, Lucien Montadert, Marco Murru, Maria Teresa Putzu, Francesco Schiavinotto, and Vladimiro Verrubbi. "The stratigraphic response to the Oligo-Miocene extension in the western Mediterranean from observations on the Sardinia graben system (Italy)." Bulletin de la Société Géologique de France 179, no. 3 (May 1, 2008): 267–87. http://dx.doi.org/10.2113/gssgfbull.179.3.267.

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Abstract The Sardinian Cainozoic rifted basin is a useful model for studying the stratigraphic response to the Oligo-Miocene structural extension in the western Mediterranean because it allows precise observations on the relationship between sedimentation and normal faulting based on outcrops and seismic reflection data. The purpose of this paper, essentially of stratigraphic nature is to propose a chronology as precise as possible of the tectonic events and of the sedimentary formations. Indeed the tectono-sedimentary framework is complex, characterized by an extreme facies variability, from

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Birdwell, Justin, Ronald C. Johnson, and Michael E. Brownfield. "Distribution of mineral phases in the Eocene Green River Formation, Piceance Basin, Colorado—Implications for the evolution of Lake Uinta." Mountain Geologist 56, no. 2 (May 1, 2019): 73–141. http://dx.doi.org/10.31582/rmag.mg.56.2.73.

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The mineralogy of the Eocene Green River Formation in the Piceance Basin, Colorado, has been the subject of numerous studies since the 1920s. Most previous work has focused on the resource potential of these lacustrine mudrocks, which in addition to substantial oil shale potential (in-place resources of 353 billion barrels of synthetic crude oil for rocks yielding at least 25 gallons per ton, GPT), includes nahcolite, a currently utilized soda ash resource, and dawsonite, a potential alternative source of aluminum. Another reason to study the mineralogy in this system is that the geographic an

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