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Diego Rodríguez,David John Ward,Jorge Andrés Quezada
Pág. 217 - 247
Late Paleocene elasmobranch findings are reported, along with reinterpretations of some previous taxonomic identifications in two main outcrops around Talcahuano area (Biobío region, Chile), and also delimiting the exposed lithostratigraphic units. Revie...
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Andrei A. Legalov
Currently, some 564 species of Curculionoidea from nine families (Nemonychidae?4, Anthribidae?33, Ithyceridae?3, Belidae?9, Rhynchitidae?41, Attelabidae?3, Brentidae?47, Curculionidae?384, Platypodidae?2, Scolytidae?37) are known from the Paleogene. Twen...
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Carolina Náñez,Norberto Malumián
Pág. 183 - 210
At the Bajada del Jagüel and Opaso sections (Añelo low, Neuquén basin), the Maastrichtian to Danian mudstones of the Jagüel Formation, are overlain by a succession of ostreid coquinas, sandstones, and mudstones. This succession has been usually referred ...
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Intizar H. Khan and William C. Clyde
Analysis of lithofacies, paleoflow directions, and sandstone petrography of upper Paleocene-lower Eocene paralic and continental sediments exposed along the transpressional suture zone of the western margin of the Indian plate indicate that the process o...
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George E. Mustoe and Mike Viney
An extensive fossil forest discovered in 2010 on private property in central Colorado, USA, has not previously been described in scientific literature. Horizontal partial logs originated as fluvially transported driftwood. A preliminary study of petrifie...
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Eduardo B. Olivero,Norberto Malumian,Susana Palamarczuk
Pág. 245 - 264
The stratigraphic evolution of marine, Upper Cretaceous-Paleocene rocks within the inner fold belt of the foreland Austral-Malvinas basins is studied at the eastern tip of the Fuegian Andes. At Thetis Bay, the stratigraphic column includes three Formatio...
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Alejandro Sanchez,Polina Pavlishina,Estanislao Godoy,Francisco Herve,Mark Fanning
Pág. 413 - 432
On the west coast of Tierra del Fuego, south of Cabo Nariz, in Chile, Upper Cretaceous to Paleocene sedirnentary successions of the Magallanes foreland basin crop out. The presence of dinoflagellate cysts, as well as radiometric U-Pb SHRIMP dating of det...
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Juan Pablo Pérez Panera
Pág. 117 - 140
Calcareous nannofossils from two boreholes (Campo Bola and Sur Río Chico) in the subsurface of eastern Austral Basin, Santa Cruz Province, Argentina, allowed the identification of Early to Middle Paleocene, Early to Middle Eocene and Late Eocene to Early...
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Pablo J. Torres Carbonell,Norberto Malumian,Eduardo B. Olivero
Pág. 197 - 235
The orogenic margin of the Austral-Malvinas foreland basin system is formed by a marine succession exposed at northern Península Mitre, composed of 550 m of the late Paleocene-early Eocene foredeep, and more than 2,900 m of the late middle Eocene-?Miocen...
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Junming Zhan, Entao Liu, Si Chen, Qiyang Zhang, Yuyue Chen, Jialin Zhong, Yongkun Zhou, Peifeng Yang and Yangshuo Jiao
Investigating the paleoenvironment and characteristics of source rocks in sedimentary basins is crucial for understanding organic matter accumulation and guiding hydrocarbon exploration. The Lishui Sag, a significant hydrocarbon-bearing depression in the...
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Peter K. Bijl,G. Raquel Guerstein,Edgar A. Sanmiguel Jaimes,Appy Sluijs,Silvio Casadio,Victor Valencia,Cecilia R. Amenábar,Alfonso Encinas
Pág. 185 - 218
The tectonic opening of the Tasmanian Gateway and Drake Passage represented crucial geographic requirements for the Cenozoic development of the Antarctic Circumpolar Current (ACC). Particularly the tectonic complexity of Drake Passage has hampered the ex...
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Manuel Martín-Martín, Francesco Guerrera and Mario Tramontana
Four main unconformities (1?4) were recognized in the sedimentary record of the Cenozoic basins of the eastern External Betic Zone (SE, Spain). They are located at different stratigraphic levels, as follows: (1) Cretaceous-Paleogene boundary, even if thi...
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Natalie R. Dastas, John A. Chamberlain, Jr. and Matthew P. Garb
Sedimentary deposits in Stoddard County, southeastern Missouri, reveal a K-Pg transition sequence represented by the uppermost Maastrichtian Owl Creek Formation and the Paleocene Clayton Formation. The Clayton Formation is characterized by a basal fossil...
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Atef M. Kasem, Mahmoud Faris, Luigi Jovane, Taysir Abdelhamid Ads, Fabrizio Frontalini and Amr S. Zaky
The variations in assemblages of calcareous nannofossils are tracked in the Dakhla and Tarawan Formations exposed at Gebel Nezzazat (central Sinai, Egypt). Five calcareous nannofossil biozones, namely NP2/3, NP4, NP5, NP6, and NP7/8 are identified. A dis...
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Sergio Marenssi,Sergio Santillana,Mauro Bauer
Pág. 67 - 91
The unconformity bounded Paleocene Sobral and Cross Valley formations represent part of the uppermost infill of the James Ross Basin of northeastern Antarctic Peninsula. Both units have been subdivided into allomembers since they also present internal un...
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Steven F. Olson
Pág. 3 - 29
ABSTRACT. The Potrerillos district displays major facies boundaries, records changes in the compositions of magmas from Jurassic to Oligocene time, and provides evidence that a porphyry copper deposit and associated skarn (37 Ma) formed between Jurassic-...
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Pablo J. Torres-Carbonell,Eduardo B. Olivero,Luis V. Dimieri
New field data, specially the discovery of the contact between Upper Cretaceous-Paleocene rock units in a previously unexplored area in southeast Tierra del Fuego, allowed us to estimate the amount of strike-slip displacement accommodated by the Fagnano ...
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Leonidas Moforis, George Kontakiotis, Hammad Tariq Janjuhah, Alexandra Zambetakis-Lekkas, Dimitrios Galanakis, Panagiotis Paschos, Christos Kanellopoulos, Sotirios Sboras, Evangelia Besiou, Vasileios Karakitsios and Assimina Antonarakou
Field investigation, biostratigraphic, paleoecological, and sedimentary microfacies analyses, as well as diagenetic processes characterization, were carried out in the Epirus region (Western Ionian Basin) to define the depositional environments and furth...
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George E. Mustoe and Graham Beard
Calcite-mineralized wood occurs in marine sedimentary rocks on Vancouver Island, British Columbia at sites that range in age from Early Cretaceous to Paleocene. These fossil woods commonly have excellent anatomical preservation that resulted from a permi...
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Rosa Carrillo-Berumen,Mirta E. Quattrocchio,Javier Helenes
Pág. 539 - 560
The Paleogene section of Punta Prat, Chile is located at 53°10?S-71°20?W in southern Magallanes-Austral Basin, includes Chorrillo Chico and Agua Fresca Formations. Both units contain a palynological assemblage composed of marine and continental palynomor...
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