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Iscayachi Formation

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Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2423(26)
... in the Cambrian ( Gohrbandt, 1992 ). The abundance of marine trace fossils throughout the Torohuayco Formation indicates that the basin had already become entirely marine in the Cambrian. The overlying Sama and Iscayachi Formations represent more open marine conditions. The presence of channels and delta front...
Journal Article
Journal: GSA Bulletin
Published: 01 July 2008
GSA Bulletin (2008) 120 (7-8): 962-975.
... in eastern Avalonia represented by the Mancetter, Outwoods, and Mons Park Formations ( Rushton et al., 1999 ); (2) the lower Cambrian Series 3–Lower Ordovician Alum Shales in Baltica ( Ahlberg and Bergström, 1998 ); and (3) the middle Furongian–Lower Ordovician Lampara, Santa Rosita, and Iscayachi Formations...
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Journal Article
Published: 01 September 2016
Journal of Paleontology (2016) 90 (5): 923-958.
...M. Franco Tortello; Susana B. Esteban Abstract The middle part of the Santa Rosita Formation (Tremadocian) is well exposed in the Iruya area, northwestern Argentina. At the Pantipampa and Rodeo Colorado localities, it is composed of shale and sandstone representing a wave-dominated shelf...
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Journal Article
Published: 01 May 2004
Geological Magazine (2004) 141 (3): 287-299.
... of sandstone-shale intercalations of the Iscayachi Formation (Fig. 3 ). This basal unit crops out in the three localities, Sama, Cieneguillas and Taraya, all situated in the eastern to central part of the study area (Fig. 1 ). The sediments are characterized by storm-influenced pro-delta to delta front...
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Journal Article
Published: 01 March 2007
Journal of Paleontology (2007) 81 (2): 261-285.
...), almost 80 m above the levels bearing Protorthisina simplex n. gen. and sp. ( Fig. 2 ). A few distorted specimens probably belonging to K. lariensis were recorded in the Iscayachi Formation at Sierra de Tacsara, southern Bolivia. These beds have yielded Apheoorthis samensis ( Kobayashi, 1937...
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Series: Geological Society, London, Special Publications
Published: 01 January 2009
DOI: 10.1144/SP325.11
EISBN: 9781862395732
... is represented by the Sama, Iscayachi, Cieneguillas, Obispo, Agua y Toro, and Pircancha or Sella formations, and the Middle Ordovician by the Anzaldo and San Benito formations. A lithostratigraphical and biostratigraphical scheme of Bolivian units was provided by Suárez Soruco (2000) , and basin evolution...
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