Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula

A micropaleontological analysis of foraminifera and palynomorphs obtained from a partial sedimentary section cropping out at Ekelöf Point, eastern James Ross Island, Antarctic Peninsula, is presented. The section, named Ekelöf Coast, includes the lowest levels of the Upper Cretaceous Hamilton Point...

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Autor principal: Caramés, A.
Otros Autores: Amenábar, C.R, Concheyro, A.
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Publicado: Asociacion Paleontologica Argentina 2016
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100 1 |a Caramés, A. 
245 1 0 |a Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula 
260 |b Asociacion Paleontologica Argentina  |c 2016 
506 |2 openaire  |e Política editorial 
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504 |a Williams, G.L., Brinkhuis, H., Pearce, M.A., Fensome, R.A., Weegink, J.W., Southern ocean and global dinoflagellate cyst events compared: Index events for the late cretaceous-neogene (2004) Proceedings of the Ocean Drilling Program, Scientific Results, 189, pp. 1-98. , N.F. Exon, J.P. Kennett, and M.J. Malone (Eds.) 
504 |a Wood, S.A., Askin, R.A., Dinoflagellate cysts from the marambio group (Upper cretaceous) of humps island (1992) Antarctic Science, 4, pp. 327-336 
504 |a Wood, G.D., Gabriel, A.M., Lawson, J.C., Chapter 3: Palynological techniques - Processing and microscopy (1996) Palynology: Principles and Applications, 1, pp. 29-50. , J. Jansonius, and D.C. McGregor (Eds.) American Association of Stratigraphic Palynologists, Dallas 
520 3 |a A micropaleontological analysis of foraminifera and palynomorphs obtained from a partial sedimentary section cropping out at Ekelöf Point, eastern James Ross Island, Antarctic Peninsula, is presented. The section, named Ekelöf Coast, includes the lowest levels of the Upper Cretaceous Hamilton Point Member of the Snow Hill Island Formation. Among the foraminifera, 18 benthictaxa including 10 agglutinated and eight calcareous are recognized. Palynomorphs include continental and marine species. The continental assemblage contains 44 spore and pollen species. The marine assemblage consists of 10 peridinioid dinoflagellate cysts species, dominating in number of specimens, and 10 gonyaulacoids. Although the palynomorph assemblage supports a late Campanian age for the section, an earliest Maastrichtian age is not excluded. The paleoenvironmental interpretation based on the distribution of foraminiferal morphogroups indicates an outer shelf-upper bathyal environment in agreement with sedimentological data. The paleoenvironmental inference based on the S/D ratio (sporomorph versus din of lagellate cysts) and the P/G ratio (pendinioid versus gonyaulacoid cysts) suggest a coastal to inner neritic setting with a continuous continental supply from the continent to the marine environment, evidenced by the slight dominance of the peridionoids over gonyaulacoids cysts. The discrepancy observed between palynological and micropaleontological-sedimentological data may be linked to the development of a narrow continental shelf during the Late Cretaceous. In such continental shelf, terrestrial palynomorphs and peridinoid cysts would quickly run down the slope and would be deposited in the deep marine environment together with gonyaulacoid cysts.  |l eng 
593 |a Institute de Estudios Andinos Don Pablo Groeber, Universidad de Buenos Aires, CONICET, Departamento de Ciencias Geológicas, Ciudad Universitaria, Intendente Guiraldes 2160, Buenos Aires, C1428EGA, Argentina 
593 |a Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina 
593 |a Instituto Antártico Argentino, 25 de Mayo 1151, 3er piso, San-Martín, Provincia de Buenos Aires, 1650, Argentina 
690 1 0 |a ANTARCTIC PENINSULA 
690 1 0 |a FORAMINIFERA 
690 1 0 |a JAMES ROSS ISLAND 
690 1 0 |a PALYNOMORPHS 
690 1 0 |a UPPER CRETACEOUS 
690 1 0 |a CAMPANIAN 
690 1 0 |a COASTAL SEDIMENT 
690 1 0 |a CONTINENTAL SHELF 
690 1 0 |a CRETACEOUS 
690 1 0 |a DINOFLAGELLATE CYST 
690 1 0 |a FORAMINIFERA 
690 1 0 |a MAASTRICHTIAN 
690 1 0 |a MARINE ENVIRONMENT 
690 1 0 |a MICROPALEONTOLOGY 
690 1 0 |a PALEOECOLOGY 
690 1 0 |a PALEOENVIRONMENT 
690 1 0 |a PALYNOMORPH 
690 1 0 |a POLLEN 
690 1 0 |a ANTARCTIC PENINSULA 
690 1 0 |a ANTARCTICA 
690 1 0 |a JAMES ROSS ISLAND 
690 1 0 |a SNOW HILL ISLAND 
690 1 0 |a WEST ANTARCTICA 
690 1 0 |a DINOPHYCEAE 
690 1 0 |a FORAMINIFERA 
700 1 |a Amenábar, C.R. 
700 1 |a Concheyro, A. 
773 0 |d Asociacion Paleontologica Argentina, 2016  |g v. 53  |h pp. 333-357  |k n. 3  |p Ameghiniana  |x 00027014  |w (AR-BaUEN)CENRE-497  |t Ameghiniana 
856 4 1 |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-84975252033&doi=10.5710%2fAMGH.27.01.2016.2963&partnerID=40&md5=f138ef799a7c1aa4356f924b682486cb  |y Registro en Scopus 
856 4 0 |u https://doi.org/10.5710/AMGH.27.01.2016.2963  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_00027014_v53_n3_p333_Carames  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v53_n3_p333_Carames  |y Registro en la Biblioteca Digital 
961 |a paper_00027014_v53_n3_p333_Carames  |b paper  |c NP 
962 |a info:eu-repo/semantics/article  |a info:ar-repo/semantics/artículo  |b info:eu-repo/semantics/publishedVersion 
963 |a NORI 
999 |c 76904