Paleogeographic approach for the oil and gas potential assessment of the Khadum Formation (Lower Oligocene) in Pre-Caucasus basin by A. N. Stafeev, A. V. Stoupakova, E. A. Krasnova, A. A. Suslova, R. S. Sautkin, Ya. A. Shitova, M. L. Makhnutina, M. E. Voronin

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Evolution of continental temperature seasonality from the Eocene greenhouse to the Oligocene icehouse –a model–data comparison by A. Toumoulin, D. Tardif, D. Tardif, Y. Donnadieu, A. Licht, J.-B. Ladant, L. Kunzmann, G. Dupont-Nivet, G. Dupont-Nivet

“…<p>At the junction of greenhouse and icehouse climate states, the Eocene–Oligocene Transition (EOT) is a key moment in Cenozoic climate history. …”
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Microfacies Analysis and Diagenetic Assessment of the Late Oligocene- Early Miocene Succession in Khabaz Oilfield, Northern Iraq by Hayder Mahdi, Manal Shakir Al-Kubaisi, Samir Nouri Al-Jawad

“… The Jeribe and Azkand formations, which were deposited during Late Oligocene-Early Miocene are a major reservoir interval in the Khabaz oilfield where it is, for the most part, a carbonate reservoir. …”
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Rodent faunas, their paleogeographic pattern, and responses to climate changes from the early Eocene to the early Oligocene in Asia by Qian Li, Qian Li, Qi Li, Qi Li, Rancheng Xu, Rancheng Xu, Yuanqing Wang, Yuanqing Wang, Yuanqing Wang

“…Here, we compiled rodent faunas from the early Eocene to the early Oligocene in Asia to discuss rodent faunal turnover and its correlation with paleogeographic and paleoclimate changes. …”
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A Late Eocene‐Oligocene Through‐Flowing River Between the Upper Yangtze and South China Sea by Peter D. Clift, Andrew Carter, Anna Wysocka, Long Van Hoang, Hongbo Zheng, Nikki Neubeck

“…Some of the zircon populations indicate local erosion and sedimentation, but others show close similarity both within northern Vietnam, as well as more widely in the Eocene Jianchuan, Paleocene‐Oligocene Simao, and Oligocene‐Miocene Yuanjiang basins of China. …”
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Assessment of Mineralogical and Geochemical Composition of Oligocene/Eocene Black Shale Deposits in Beni Suef Area, Egypt by Samar R. Soliman, Yasser F. Salama, Mohamed I. El-Sayed, Mohamed I. Abdel-Fattah, Zakaria M. Abd-Allah

“…The total organic carbon content reaches 2.27 wt% at the El Fashn Formation in the Ghaida Al-Sharqia quarry but 0.36 wt% in the Oligocene Dabaa Formation in the Maydoum quarry. However, the total sulfur content reaches 0.58 wt% in the Dabaa Formation but 1.52 wt% in the El Fashn Formation. …”
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Paleo-environmental reconstruction of oligocene to early miocene sediments of Greater UghelliDepobelt, Niger Delta Basin by F.A. Lucas, T.J. Fregene

“… Paleoenvironmental study of Oligocene to Early Miocene sediments of Greater UghelliDepobelt Niger Delta Basin were carried outusing foraminiferal micropaleontology as geologic tools.Fifty (50) ditch cutting samples ranging from 20ft.-11,820ft (6.09m-3603.7m) was used with the aim of establishing thepaleo-environment of the well. …”
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Eocene Western European endemic genus Thaumastosaurus: new insights into the question “Are the Ranidae known prior to the Oligocene?” by Davit Vasilyan

“…Taking the fossil record and the climate evolution of that time into account, it can be concluded that Thaumastosaurus represents one of the groups among the vertebrates that disappeared during the large extinction event at the Eo–Oligocene transition, known as the Grande Coupure. …”
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The Eocene to Oligocene boundary and paleoclimatic indications based on calcareous nannofossils of Tonasa Formation, South Sulawesi, Indonesia by Meutia Farida, Asri Jaya, Asmita Ahmad, Jimmi Nugraha

“…The zonal boundary was determined based on calcareous nannoplankton; the Late Eocene to Middle Oligocene boundary of the Tonasa Formation was found in this section. …”
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Traces of calcium oxalate biomineralization in fossil leaves from late Oligocene maar deposits from Germany by Mahdieh Malekhosseini, Hans-Jürgen Ensikat, Victoria E. McCoy, Torsten Wappler, Maximilian Weigend, Lutz Kunzmann, Jes Rust

“…Here we investigate fossil angiosperm leaves from the late Oligocene Rott Fossil Lagerstätte and report ghost crystals of various shapes, sizes and topology (distribution patterns), and cavities. …”
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New specimens and species of the Oligocene toothed baleen whale Coronodon from South Carolina and the origin of Neoceti by Robert W. Boessenecker, Brian L. Beatty, Jonathan H. Geisler

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Groenlandia pescheri sp. nov. (Potamogetonaceae) from the Late Oligocene Fossil-Lagerstätte Enspel (Westerwald, Germany) by DIETER UHL, MARKUS POSCHMANN

“…Uhl & Poschmann sp. nov., belonging to the family Potamogetonaceae, is described from the Late Oligocene Fossil-Lagerstätte Enspel (Westerwald, Germany). …”
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First record of insectivore from the late Oligocene, Kargil Formation (Ladakh Molasse Group), Ladakh Himalayas by Wasim A. Wazir, Florentin Cailleux, Ramesh K. Sehgal, Rajeev Patnaik, Navin Kumar, Lars W. van den Hoek Ostende

“…The Kargil Formation in the region of Ladakh (northern India) is known for its late Oligocene mammal fauna of both large mammals and rodents. …”
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Are diversification rates and chromosome evolution in the temperate grasses (Pooideae) associated with major environmental changes in the Oligocene-Miocene? by Manuel Pimentel, Marcial Escudero, Elvira Sahuquillo, Miguel Ángel Minaya, Pilar Catalán

“…Diversification of the Pooideae started in the Late-Eocene and was especially intense during the Oligocene-Miocene. The background diversification rate increased significantly at the time of the origin of the Poodae + Triticodae clade. …”
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Origin of the Oligocene Tuolangla porphyry-skarn Cu-W-Mo deposit in Lhasa terrane, southern Tibet by Yong Huang, Ming-hua Ren, Wei Liang, Guang-ming Li, Kelly Heilbronn, Zuo-wen Dai, Yi-yun Wang, Li Zhang

“…This finding may clarify why the Oligocene (about 23 Ma) deposits are found only in the Zedang area and why mineralization types of the Oligocene mineralization are considerably different from those of the Miocene (17–14 Ma) mineralization.…”
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Nummulitids, lepidocyclinids and Sr-isotope data from the Oligocene of Kutch (western India) with chronostratigraphic and paleobiogeographic evaluations by György Less, Gianluca Frijia, Ercan Özcan, Pratul K. Saraswati, Mariano Parente, Pramod Kumar

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The coupling relationships of the Oligocene fault fan system and their control over natural gas accumulation in the Qiongdongnan Basin by Qingbo Zeng, Chenyang Feng, Haizhang Yang, Mo Ji, Shuang Song, Shuai Guo, Ying Chen

“…Oligocene (fan) delta-associated coal measures and marine source rocks are the main gas-generating source rocks in the Qiongdongnan Basin, and (fan) delta sand bodies are the dominant types of reservoirs. …”
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Taxonomic revision of the Oligocene percoid fish Oligoserranoides budensis (Heckel, 1856), from the Paratethys and paleobiogeographic comments by M. BIENKOWSKA-WASILUK, M. PALDYNA

“… Small perch-like fishes from the Oligocene of the Paratethys have been traditionally assigned to Serranus budensis (Heckel, 1856). …”
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THE EARLY OLIGOCENE FLORA OF SANTA GIUSTINA (LIGURIA, ITALY) - REVISION AND COMPARISON WITH THE FLORA OF THE TARD CLAY FORMATION by LILLA HABLY

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Changes in the high-latitude Southern Hemisphere through the Eocene–Oligocene transition: a model–data comparison by A. T. Kennedy-Asser, A. T. Kennedy-Asser, D. J. Lunt, D. J. Lunt, P. J. Valdes, P. J. Valdes, J.-B. Ladant, J. Frieling, V. Lauretano, V. Lauretano

“…<p>The global and regional climate changed dramatically with the expansion of the Antarctic Ice Sheet at the Eocene–Oligocene transition (EOT). These large-scale changes are generally linked to declining atmospheric <span class="inline-formula"><i>p</i>CO₂</span> levels and/or changes in Southern Ocean gateways such as the Drake Passage around this time. …”
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