Estratigrafía y bioestratigrafía del Ordovícico Medio del río Las Chacritas, Precordillera Central de San Juan
作者： Matilde Beresi , Susana Heredia , Susana Heredia , Ana Mestre , Ana Mestre
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摘要: STRATIGRAPHY AND Y BIOSTRATIGRAPHY FROM THE MIDDLE ORDOVICIAN OF LAS CHACRITAS RIVER, SAN JUAN CENTRAL PRECORDILLERA.-Two Ordovician carbonate formations are recognized in the Las Chacritas Creek (Sierra de La Trampa, Central Precordillera ). The lithostratigraphic nomenclature is analyzed and revised, Aguaditas Formation proposed for succession that overlying San Juan Formation. middle Darriwilian conodont faunas recovered from studied stratigraphic interval allowed usage of Baltic biostratigraphic chart: Eoplacognathus pseudoplanus suecicus zones. contact between correlation possible with several localities Precordillera. Resumen: ESTRATIGRAFIA BIOESTRATIGRAFIA DEL ORDOVICICO MEDIO RIO CHACRITAS, PRECORDILLERA DE JUAN.Se reconocen dos unidades carbonaticas ordovicicas en la Quebrada del rio Central). Se analiza y revisa nomenclatura litoestratigrafica proponiendose Formacion para sucesion carbonatica que sobreyace a Juan. da conocer bioestratigrafia conodontes darriwiliana media, especialmente tope parte inferior Aguaditas. el pase entre transicion calcareo-pelitica (Formacion Aguaditas), se lo correlaciona con otras localidades Central.
参考文章(13)
Marcelo G. Carrera, ANÁLISIS PALEOECOLÓGICO DE LA FAUNA DE PORÍFEROS DEL LLANVIRNIANO TARDÍO DE LA PRECORDILLERA ARGENTINA Ameghiniana. ,vol. 34, pp. 309- 316 ,(1997)
Ricardo A. Astini, Stratigraphical evidence supporting the rifting, drifting and collision of the Laurentian Precordillera terrane of western Argentina Geological Society, London, Special Publications. ,vol. 142, pp. 11- 33 ,(1998) , 10.1144/GSL.SP.1998.142.01.02
ANITA LÖFGREN, ZHANG JIANHUA, Element association and morphology in some Middle Ordovician platform-equipped conodonts Journal of Paleontology. ,vol. 77, pp. 721- 737 ,(2003) , 10.1666/0022-3360(2003)077<0721:EAAMIS>2.0.CO;2
Anita Löfgren, Early to early Middle Ordovician conodont biostratigraphy of the Gillberga quarry, northern Öland, Sweden Gff. ,vol. 122, pp. 321- 338 ,(2000) , 10.1080/11035890001224321
YONG-YI ZHEN, IAN PERCIVAL, Ordovician conodont biogeography – reconsidered Lethaia. ,vol. 36, pp. 357- 369 ,(2003) , 10.1080/00241160310006402
Gladys Ortega, Guillermo L. Albanesi, Sebastián E. Frigerio, Graptolite–conodont biostratigraphy and biofacies of the Middle Ordovician Cerro Viejo succession, San Juan Precordillera, Argentina Palaeogeography, Palaeoclimatology, Palaeoecology. ,vol. 245, pp. 245- 263 ,(2007) , 10.1016/J.PALAEO.2006.02.023
ANITA LFGREN, The conodont fauna in the middle ordovician Eoplacognathus pseudoplanus Zone of Baltoscandia Geological Magazine. ,vol. 141, pp. 505- 524 ,(2004) , 10.1017/S0016756804009227
S. H. Peralta, S. Heredia, M. Beresi, Darriwilian Conodont Biostratigraphy of the Las Chacritas Formation, Central Precordillera (San Juan Province, Argentina) Geologica Acta. ,vol. 3, pp. 385- 394 ,(2005) , 10.1344/105.000001386
Florentin Paris, Stig M Bergström, Barry D Webby, Roger A Cooper, Stratigraphic framework and time slices New York : Columbia University Press. ,(2004)
Zhang Jian-Hua, Review of the Ordovician conodont zonal index Eoplacognathus suecicus Bergstrom, 1971 Journal of Paleontology. ,vol. 73, pp. 487- 493 ,(1999) , 10.1017/S0022336000027992