Artículo

Vellekoop, J.; Holwerda, F.; Prámparo, M.B.; Willmott, V.; Schouten, S.; Cúneo, N.R.; Scasso, R.A.; Brinkhuis, H. "Climate and sea-level changes across a shallow marine Cretaceous–Palaeogene boundary succession in Patagonia, Argentina" (2017) Palaeontology. 60(4):519-534
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Abstract:

Upper Maastrichtian to lower Paleocene, coarse-grained deposits of the Lefipán Formation in Chubut Province, (Patagonia, Argentina) provide an opportunity to study environmental changes across the Cretaceous–Palaeogene (K–Pg) boundary in a shallow marine depositional environment. Marine palynological and organic geochemical analyses were performed on the K–Pg boundary interval of the Lefipán Formation at the San Ramón section. The palynological and organic geochemical records from the San Ramón K–Pg boundary section are characteristic of a highly dynamic, nearshore setting. High abundances of terrestrial palynomorphs, high BIT-index values and the occasional presence of plant fossils are indicative of a large input of terrestrial organic material. The organic-walled dinoflagellate cyst (dinocyst) assemblage is generally dominated by Senegalinium and other peridinioid dinocyst taxa, indicative of high-nutrient conditions and decreased salinities, probably associated with a large fluvial input. The reconstructed sea surface temperatures range from 25°C to 27°C, in accordance with the tropical climate inferred by palynological and megafloral studies. As in the Bajada del Jagüel section, ~500 km north-north-east of San Ramón, peaks of Senegalinium spp. were recorded below and above the K–Pg boundary, possibly related to enhanced runoff resulting from more humid climatic conditions. The lithological, palynological and organic geochemical records suggest the occurrence of a sea-level regression across the K–Pg boundary, resulting in a hiatus directly at the boundary in both sections, followed by a transgression in the Danian. © The Palaeontological Association

Registro:

Documento: Artículo
Título:Climate and sea-level changes across a shallow marine Cretaceous–Palaeogene boundary succession in Patagonia, Argentina
Autor:Vellekoop, J.; Holwerda, F.; Prámparo, M.B.; Willmott, V.; Schouten, S.; Cúneo, N.R.; Scasso, R.A.; Brinkhuis, H.
Filiación:Marine Palynology & Palaeoceanography, Laboratory of Palaeobotany & Palynology, Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Budapestlaan 4, Utrecht, 3584 CD, Netherlands
Division Geology, Department of Earth & Environmental Sciences, KU Leuven, Celestijnenlaan 200E, Leuven, 3001, Belgium
Staatliche Naturwissenschaftliche Sammlungen Bayerns (SNSB), Bayerische Staatssammlung für Paläontologie und Geologie, Richard-Wagner-Strasse 10, München, 80333, Germany
GeoBioTec, Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa, Campus da Caparica, Caparica, 2829-516, Portugal
Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA), CCT-CONICET, CC 330, Mendoza, 5500, Argentina
Department of Marine Microbiology & Biogeochemistry and Utrecht University, Royal Netherlands Institute for Sea Research, Texel, Netherlands
Faculty of Geosciences, Utrecht University, Budapestlaan 4, Utrecht, 3584 CD, Netherlands
Museo Paleontológico Egidio Feruglio – CONICET, Avenida Fontana 140, Trelew, Chubut, 9100, Argentina
Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires (IGeBA), Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires-CONICET, Ciudad Universitaria, Pabellón II, Buenos Aires, C1428, Argentina
Alfred Wegener Institute, Helmoltz Centre for Polar and Marine Research, Am Handelshafen 12, Bremerhaven, 27570, Germany
Palabras clave:Argentina; climate; Cretaceous; dinocysts; Palaeogene; sea level; biostratigraphy; Cretaceous-Paleogene boundary; depositional environment; dinoflagellate cyst; fossil assemblage; paleoceanography; paleoclimate; palynomorph; sea level change; shallow water; stratigraphic correlation; transgression; Argentina; Chubut; Patagonia; Dinophyceae
Año:2017
Volumen:60
Número:4
Página de inicio:519
Página de fin:534
DOI: http://dx.doi.org/10.1111/pala.12297
Título revista:Palaeontology
Título revista abreviado:Palaeontology
ISSN:00310239
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310239_v60_n4_p519_Vellekoop

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Citas:

---------- APA ----------
Vellekoop, J., Holwerda, F., Prámparo, M.B., Willmott, V., Schouten, S., Cúneo, N.R., Scasso, R.A.,..., Brinkhuis, H. (2017) . Climate and sea-level changes across a shallow marine Cretaceous–Palaeogene boundary succession in Patagonia, Argentina. Palaeontology, 60(4), 519-534.
http://dx.doi.org/10.1111/pala.12297
---------- CHICAGO ----------
Vellekoop, J., Holwerda, F., Prámparo, M.B., Willmott, V., Schouten, S., Cúneo, N.R., et al. "Climate and sea-level changes across a shallow marine Cretaceous–Palaeogene boundary succession in Patagonia, Argentina" . Palaeontology 60, no. 4 (2017) : 519-534.
http://dx.doi.org/10.1111/pala.12297
---------- MLA ----------
Vellekoop, J., Holwerda, F., Prámparo, M.B., Willmott, V., Schouten, S., Cúneo, N.R., et al. "Climate and sea-level changes across a shallow marine Cretaceous–Palaeogene boundary succession in Patagonia, Argentina" . Palaeontology, vol. 60, no. 4, 2017, pp. 519-534.
http://dx.doi.org/10.1111/pala.12297
---------- VANCOUVER ----------
Vellekoop, J., Holwerda, F., Prámparo, M.B., Willmott, V., Schouten, S., Cúneo, N.R., et al. Climate and sea-level changes across a shallow marine Cretaceous–Palaeogene boundary succession in Patagonia, Argentina. Palaeontology. 2017;60(4):519-534.
http://dx.doi.org/10.1111/pala.12297