STRATIGRAPHY OF THE LA MESETA FORMATION (EOCENE), MARAMBIO (SEYMOUR) ISLAND, ANTARCTICA
Publicación Electrónica de la Asociación Paleontológica Argentina, 2015 . La Meseta Formation is a discontinuity bounded sedimentary unit which crops out on Marambio (Seymour) and Cockburn islands, approximately 100 km SE of the northern tip of the Antarctic Peninsula.
Sergio A. Marenssi +2 more
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Isolated in the highlands, found in the museum: A new species of Characidium (Crenuchidae) from a Bolivian National Park, with a CT scan revealing features. [PDF]
J Fish BiolAbstract A new species of Characidium is described from a small, isolated river in the highland areas of Noel Kempff Mercado National Park, Bolivia. The new taxon can be diagnosed by the presence of a relatively broad and conspicuous dark midlateral stripe extending from the tip of snout to the base of the caudal fin, markedly darker than the vertical ...
Oliveira-Silva L +3 more
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Spermatophyta Molecular Clock: Time Drift and Recent Acceleration. [PDF]
Plant Environ InteractExponential increase in the base substitution rate in recent geologic time. ABSTRACT Angiospermae radiation is widely recognized as a mid‐Cretaceous event, but the adaptive radiation of Asarum and Viola as spring ephemerals also occurred during the Quaternary. To better understand the evolution of Angiospermae through geological time, a robust and well‐
Osozawa S.
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Skates and rays (Elasmobranchii, Batomorphii) from the Eocene La Meseta and Submeseta formations, Seymour Island, Antarctica. [PDF]
Hist Biol, 2019 Eocene deposits of the famous La Meseta Formation of Seymour Island, Antarctic Peninsula, yielded the most diverse Paleogene fossil elasmobranch association of the Southern Hemisphere. In this assemblage, sharks clearly dominate the fauna, whereas batoids are very rare components.
Engelbrecht A +3 more
europepmc +8 more sources
Biodeterioration of Antarctic fossil penguin bones caused by lichens from the Eocene La Meseta Formation [PDF]
Polar Biology, 2021 A large part of the Antarctic surface is covered by lichens since they can withstand extreme environmental conditions. Lichens are primary colonizers and contribute to soil formation by deteriorating rocks through a combination of chemical and physical mechanisms. Therefore, fossil remains found exposed on the surface are usually colonized by epilithic
Renato García +2 more
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Geophysical Monograph Series, Page 169-190., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Nasrrddine Youbi +9 more
wiley +1 more source
Biosignature Preservation in Stromatolites From the Carri Laufquen Lakes System, Patagonia: Implications for Martian Palaeolacustrine Environments [PDF]
GeobiologyABSTRACT The Carri Laufquen Lakes System is a highly alkaline, basalt‐hosted lacustrine environment in northern Patagonia, Argentina. Diverse morphologies of Late Pleistocene sub‐fossil stromatolites occur along the lakeshores. Using detailed optical and electron microscopy, spectroscopy and organic geochemical analyses, this study shows that ...
Dorneles V +8 more
europepmc +2 more sources
Eocene bryozoan assemblages from the La Meseta Formation of Seymour Island, Antarctica [PDF]
Geological Quarterly, 2018 Early to Late Eocene bryozoans from the La Meseta Formation of Seymour Island were collected at two localities within the Cucullaea I Allomember (Telm4 and Telm5) on the northwestern side of the island and in two localities within the Submeseta Allomember (Telm6 and Telm7) on the northeastern side.
Urszula HARA +3 more
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GLOTTIDIA (BRACHIOPODA: LINGULIDAE) FROM THE EOCENE LA MESETA FORMATION, SEYMOUR ISLAND, ANTARCTICA [PDF]
Palaeontology, 2005 The specimens previously described as Lingula antarctica Buckman from late Eocene strata on Seymour Island, Antarctic Peninsula, should be assigned to the genus Glottidia. The morphological features and taxonomic charac- ters of G. antarctica are described and illustrated and com- pared with those of other known species of Glottidia. A full description
CHRISTIAN C. EMIG +1 more
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A reassessment of Antarctic polydolopid marsupials (Middle Eocene, La Meseta Formation)
Antarctic Science, 2009 AbstractNew polydolopid marsupial specimens have been recovered from the La Meseta Formation, a late early Eocene to probably early Oligocene unit cropping out in the northern third of Seymour (Marambio) Island, at some 100 km off the northern Antarctic Peninsula.
Chornogubsky Clerici, Laura +2 more
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