NDLI: Microfósiles calcáreos tithonianos (Jurásico superior) en el sector oriental de la cuenca Neuquina, Argentina

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Microfósiles calcáreos tithonianos (Jurásico superior) en el sector oriental de la cuenca Neuquina, Argentina

Content Provider	Semantic Scholar
Author	Ballent, Sara C. Ronchi, Diana I. Angelozzi, Gladys N.
Copyright Year	2004
Abstract	Resumen. Se describen e ilustran foraminiferos bentonicos, ostracodos y nanofosiles calcareos de la Formacion Vaca Muerta provenientes de sondeos ubicados en el sector oriental de la cuenca Neuquina, en el centro–oeste de Argentina. La presencia casi exclusiva del genero de foraminifero Epistomina y del ostracodo Cytherella, en asociaciones monoespecificas, sugiere un ambiente marino de baja energia y deficitaria oxigenacion. Los nanofosiles permiten asignar una edad tithoniana superior baja e incluir la asociacion en la parte inferior de la Zona NJK. Se describe como nueva especie Epistomina viviersae sp. nov. Abstract. TITHONIAN (UPPER JURASSIC) CALCAREOUS MICROFOSSILS FROM THE EASTERN NEUQUEN BASIN, ARGENTINA. Benthic foraminifers, ostracods and calcareous nannofossils from the Vaca Muerta Formation in boreholes drilled in the eastern Neuquen Basin, central–western Argentina, are described and illustrated. The monospecific assemblages of the foraminifer genus Epistomina and the ostracod Cytherella typify a marine environment with low energy regime and oxygen depressed sea–bottom conditions. Nannofossils association corresponding to the lower part of Zone NJK indicates a lowermost Upper Tithonian age. One species, Epistomina viviersae sp. nov., is described.
Starting Page	13
Ending Page	24
Page Count	12
File Format	PDF HTM / HTML
Volume Number	41
Alternate Webpage(s)	http://www.ameghiniana.org.ar/index.php/ameghiniana/article/download/796/1542
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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