Search Results - "Marenssi, Sergio"

Conifer fossil woods from the La Meseta Formation (Eocene of Western Antarctica): Evidence of Podocarpaceae-dominated forests by Pujana, Roberto R., Santillana, Sergio N., Marenssi, Sergio A.

“…A new collection of 120 fossil wood samples from early Eocene sediments of the La Meseta Formation is studied. Conifers represent 68% of the total amount of…”
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Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America–Antarctica land connection by Reguero, Marcelo A., Gelfo, Javier N., López, Guillermo M., Bond, Mariano, Abello, Alejandra, Santillana, Sergio N., Marenssi, Sergio A.

“…The biogeographic hypothesis more accepted today is that Antarctica (West Antarctica) and southern South America (Magellan region, Patagonia) were connected by…”
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Tectonic and geomorphic controls on the lacustrine deposits of the Neogene Vinchina Basin, northwestern Argentina by Marenssi, Sergio A, Limarino, Carlos O, Schencman, Laura J, Ciccioli, Patricia L

“…Two episodes of lacustrine sedimentation, separated by an erosional surface and fluvial sedimentation, took place in the southern part of the broken foreland…”
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Vegasaurus molyi, gen. et sp. nov. (Plesiosauria, Elasmosauridae), from the Cape Lamb Member (Lower Maastrichtian) of the Snow Hill Island Formation, Vega Island, Antarctica, and Remarks on Wedellian Elasmosauridae by O'Gorman, José P, Salgado, Leonardo, Olivero, Eduardo B, Marenssi, Sergio A

“…A new elasmosaurid, Vegasaurus molyi, gen. et sp. nov., from Vega Island, James Ross Archipelago, Antarctica, is described. The holotype and only specimen of…”
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Using fluvial cyclicity to decipher the interaction of basement- and fold-thrust-belt tectonics in a broken foreland basin; Vinchina Formation (Miocene), northwestern Argentina by Marenssi, Sergio A, Ciccioli, Patricia L, Limarino, Carlos O, Schencman, Laura J, Diaz, Marianela Y

“…The Miocene Vinchina Formation is made up of more than 5100 meters of siliciclastic sediments deposited mostly in fluvial environments in a broken foreland…”
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Non-parametric statistics as a tool for provenance analysis in gravel deposits: Vinchina Formation (Miocene, Argentine) as a study case by Díaz, Marianela, Marenssi, Sergio A., Limarino, Carlos O.

“…ABSTRACT The Neogene Vinchina Basin developed between 27 and 33°S as a foreland basin as a response to the Andean deformation in the southern part of the…”
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Sedimentary paleoenvironments of the Toro Negro Formation (Neogene), Andean broken foreland, northwest Argentina by Ciccioli, Patricia Lucía, Marenssi, Sergio A

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Provenance, environmental and paleogeographic controls on sandstone composition in an incised-valley system: the Eocene La Meseta Formation, Seymour Island, Antarctica by Marenssi, Sergio A, Net, Laura I, Santillana, Sergio N

“…The Eocene La Meseta Formation is the youngest exposed unit of the back-arc James Ross Basin, Antarctic Peninsula, cropping out in Seymour (Marambio) Island…”
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Crossvallia unienwillia, a new Spheniscidae (Sphenisciformes, Aves) from the Late Paleocene of Antarctica by Tambussi, Claudia P., Reguero, Marcelo A., Marenssi, Sergio A., Santillana, Sergio N.

“…Modern penguins are typically small to medium-sized birds, and nearly all known modern specimens are smaller than the most archaic Paleogene relatives. Here we…”
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Weddellian marine/coastal vertebrates diversity from a basal horizon (Ypresian, Eocene) of the Cucullaea I Allomember, La Meseta formation, Seymour (Marambio) Island, Antarctica by Reguero, Marcelo A., Marenssi, Sergio A., Santillana, Sergio N.

“…The La Meseta Formation crops out in Seymour/Marambio Island, Weddell Sea, northeast of the Antarctic Peninsula and contains one of the world's most diverse…”
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Paleoenvironmental, paleontological, magmatic and tectonic evolution of the Mio-Pleistocene Andean Basins in Southern South America by Ciccioli, Patricia L., Limarino, Carlos O., Marenssi, Sergio A.

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Using sandstone and conglomerate petrofacies to unravel multiple provenance areas in broken-foreland basins: The vinchina formation (Miocene, NW Argentina) as a study case by Díaz, Marianela, Marenssi, Sergio A.

“…The Vinchina Formation is a very thick succession (up to 6400 m-thick) of red-beds deposited in fluvial, fluvio-eolian, eolian, and lacustrine environments…”
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Depositional and diagenetic controls on sandstone compactional fabrics in an Andean broken foreland basin, the Miocene Vinchina formation, northwestern Argentina by Marenssi, Sergio A., Díaz, Marianela, Limarino, Carlos O.

“…The very thick (up to 6000 m thick) Miocene Vinchina Formation was deposited between 16 and 8 Ma ago and later covered by more than 2500 m of…”
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U–Pb ages and paleoenvironmental evolution of the guanchín formation (neogene fiambalá foreland basin), Central Andes, Argentina by Deri, Maximiliano N., Ciccioli, Patricia L., Amidon, William H., Marenssi, Sergio A., Kylander-Clark, Andrew

“…The Guanchín Formation is a sedimentary unit that was deposited during the Andean orogeny and is preserved in the Fiambalá Basin in NW Argentina. It records an…”
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U-PB ages and environmental evolution of the De La Cuesta Formation (late Paleozoic): Record of the Choiyoi Volcanism in the retroarc area of the Paganzo Basin, Western Gondwana by Limarino, Carlos O., Ciccioli, Patricia L., Marenssi, Sergio, Césari, Silvia N., Friedman, Richard

“…This paper examines the relationship between the sedimentation in the retroarc Paganzo Basin and the activity of the magmatic arc developed in the neighboring…”
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Fossil woods from the Cross Valley Formation (Paleocene of Western Antarctica): Araucariaceae-dominated forests by Pujana, Roberto R., Marenssi, Sergio A., Santillana, Sergio N.

“…Fossil woods from Paleocene sediments of the Cross Valley Formation (Seymour Island, Antarctic Peninsula) are anatomically studied in detail. We collected 64…”
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Short note. A new U-PB age for the Talampaya Formation: Stratigraphic and paleoclimatic implications by Salvó Bernárdez, Salomé C., Limarino, Carlos O., Marenssi, Sergio A., Ciccioli, Patricia L.

“…This paper presents a new U–Pb zircon age of 253.40 ± 1.06 Ma for the middle part of the Talampaya Formation, which is consistent with the previously reported…”
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The Oligocene – Early Miocene erg in the western Andean basins: Patterns during the transition from eolian to fluvial sedimentation by Ciccioli, Patricia L., Marenssi, Sergio A., Salvó Bernárdez, Salomé C., Limarino, Carlos O.

“…This paper analyzes an extended eolian field developed during the Oligocene-Early Miocene along the eastern flank of the Andes. This eolian episode, herein…”
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Brachyoxylon fossil woods with traumatic resin canals from the Upper Cretaceous Cerro Fortaleza Formation, southern Patagonia (Santa Cruz Province, Argentina) by Rombola, Cosme F., Greppi, Carlos D., Pujana, Roberto R., García Massini, Juan L., Bellosi, Eduardo S., Marenssi, Sergio A.

“…Two silicified fossil woods from outcrops of the Cerro Fortaleza Formation (Campanian, Upper Cretaceous) in Los Hornos Hill, Santa Cruz Province, Argentina are…”
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Alluvial to lacustrine sedimentation in an endorheic basin during the Mio-Pliocene: The Toro Negro Formation, Central Andes of Argentina by Ciccioli, Patricia L., Marenssi, Sergio A., Amidon, William H., Limarino, Carlos O., Kylander-Clark, Andrew

“…A 2400 m-thick sedimentary column belonging to the Toro Negro Formation was recorded along the Quebrada del Yeso, Sierra de Los Colorados (Vinchina Basin), La…”
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