Biostratigraphic Study of Paleozoic and Mesozoic Groups in Central Andes-Report on the Field Survey-

Sakagami, Sumio; Yanagida, Juichi; Kase, Tomoki; Nagai, Koichi; Rangel, César Z.; Urdininea, Mario R.

doi:10.5026/jgeography.92.1_43

Cited by 4 publications

(5 citation statements)

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“…However, biostratigraphic correlations (Azcuy et al 2007;Grader et al 2008) need to be reconciled with recent radiometric data (Henderson et al 2009) Biostratigraphic comparison between different taxonomic groups in the Copacabana Formation in Bolivia has led to age uncertainties as the unit is time-transgressive (Figures 2 and 4;Grader 2003). For the Permian part of the Copacabana Formation, this has included Wolfcampian (Asselian -mid-Sakmarian) conodont Neogondolella bisselli -Sweetognathodus whitei and fusulinid Pseudoschwagerina texana Assemblage Zones (Sakagami et al 1986(Sakagami et al , 1991Sua ´rez-Riglos et al 1987;Sakagami and Mizuno 1994). The Coal Member was previously thought to be part of the Artinskian (Leonardian) stage as determined by fusulinids (Eoparafusulina gracilus Subzone), conodonts (Neostreptognathous pequopensis-Sweetognathodus behnkeni Assemblage Zone) and small foraminifera (Frontinodosaria -Robuloides), as well as Wolfcampian -Leonardian/Artinskian(?)…”

Section: Previous Paleontological Information and Age Determinations ...mentioning

confidence: 99%

Global biostratigraphic comparison and correlation of an early Cisuralian palynoflora from Bolivia

et al. 2014

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Section: Previous Paleontological Information and Age Determinations ...mentioning

confidence: 99%

Global biostratigraphic comparison and correlation of an early Cisuralian palynoflora from Bolivia

et al. 2014

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“…These authors did not attempt a biostratigraphic zonation. In contrast, fusulines have been recorded from South America for a century and they have been extensively used in the region (Yamagiwa and Range1 1979;Urdinea and Yamagiwa 1980;Sakagami 1986;Sakagami and Mizuno 1994). Endothyrids are often associated with fusulines in the upper part of carbonate platforms and ramps (Mamet 1984;Beauchamp 1994 One could imagine that the position of the subcontinent in rather high latitudes, as indicated by paleomagnetism (Scotese and Mc Kerrow 1990;Golonka et al 1994), would not favor proliferation of calcareous foraminifers that are normally associated with warm to temperate -warm temperatures.…”

Section: Introductionmentioning

confidence: 90%

Late Paleozoic small foraminifers (endothyrids) from South America (Ecuador and Bolivia)

Mamet¹

1996

Can. J. Earth Sci.

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In the Pangea, small foraminifers (endothyrids) are useful tools for studying the stratigraphy of the late Paleozoic. However, they have been largely ignored in South America. This article reports for the first time their widespread occurrence in the subcontinent and illustrates representatives of 21 families encountered from the Early Pennsylvanian (Bashkirian) to the Early Permian (Artinskian). Fifty-five foraminifera1 genera are recognized in three basins of Ecuador-Bolivia and enable us to establish a crude zonation. The fauna is nonendemic, all genera being previously known from Eurasia and North America. There are also a number of taxa derived from the Arctic Realm (Sverdrup Basin and Arctic Alaska). In association with the microflora of green and red algae, the microfauna suggests temperate warm conditions. This indicates that since the Middle Carboniferous, warm climatic oscillations affected the South American part of Gondwana.R6surn6 : Les Foraminieres endothyroldes se sont avCrCs trks utiles dans la stratigraphie de la PangCe. Toutefois, ils sont restCs jusqu'g prksent largement ignores en AmCrique du Sud. Nous rapportons ici, pour la premiere fois, leur abondance dans ce subcontinent et illustrons des reprksentants de 21 farnilles obsemCes depuis la base du Pennsylvanien (Bashkirien) jusqu'au Permien infkrieur (Artinskien). Cinquante-cinq genres ont kt6 reconnus dans trois bassins de 1'Equateur et de la Bolivie et ils permettent d'ttablir une zonation biostratigraphique temporaire. L'endCmisme au niveau des genres est nul, tous les taxa ayant Ct C d6crit.s auparavant en Eurasie et Amtrique du Nord. Il existe Cgalement quelques taxa dtrivCs du Domaine arctique (bassin de Sverdrup et Alaska arctique). En association avec les microflores d'Algues benthiques vertes et rouges, la microflore suggere des conditions de saimentation en eaux tempCrCes chaudes. Ceci indique que des oscillations climatiques chaudes affectaient la partie sud-amkricaine du Gondwana et ce, d8s le Carbonifire moyen.

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“…These represent largely the field observations of this author. A Japanese research group studying the Paleozoic and Mesozoic biostratigraphy of Bolivia has been working partly in the same areas and has published (Sakagmi et al, 1983;Sakagmi, 1984Sakagmi, , 1986 Sakagami (1986) demonstrated that sections of the Copacabana Limestone in the Lake Titicaca area could be sim ply correlated biostratigraphically using a variety of inverte brates, principally fusulinids, brachiopods, bryozoans, and mollusks. My observations confirm this and add the corals as another useful group.…”

Section: Structure and Relationshipsmentioning

confidence: 99%

“…This assignment was accepted until Dunbar and Newell (1946) described the fusulinid faunas of the Copacabana Lime stone and reassigned the age to the Early Permian, an age ac cepted by later workers (Urdininea and Yamagiwa, 1980) on the fusulinids. However, Sakagami et al (1981;Sakagami, 1986) extended some of their columnar sections down into the Upper Pennsylvanian without explanation. Suarez-Riglos (1984) and Suarez-Riglos, Hunicken, and Merino (1987) reported high Virgilian conodonts in the lowermost beds of the formation at Yaurichambi.…”

Section: Structure and Relationshipsmentioning

confidence: 99%

Permian corals of Bolivia

Wilson¹

1990

J. Paleontol.

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Permian corals of Bolivia are confined to the Lower Permian (Wolfcampian, Leonardian) Copacabana Limestone. The coral fauna of the formation in the Lake Titicaca to the central altiplano areas of the Department of La Paz consists of two solitary rugose coral species, two colonial rugose coral species (one each of fasciculate and cerioid), and two tabulate coral species. New taxa are Stylastraea branisai n. sp., Durhamina pandolfi n. sp., Michelinia escobari n. sp., and Cladochonus carrascoi n. sp. Lophophyllidium striatum (d'Orbigny, 1839), based on Bolivian specimens, is redescribed, a lectotype designated, and the range extended to North America. Although the fauna is small, its taxonomic composition shows clear affinity with faunas of similar age northward through South and Central America to Mexico and the USA Texas-Oklahoma-Midcontinent region. The Bolivian fauna thus is confirmed as belonging to the Cyathaxonid Coral Province, which is restricted to the above areas. A species of Durhamina previously erected for Guatemalan specimens occurs in the Copacabana Limestone of Peru and strengthens the province assignment of the formation.

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Biostratigraphic Study of Paleozoic and Mesozoic Groups in Central Andes-Report on the Field Survey-

Cited by 4 publications

References 1 publication

Global biostratigraphic comparison and correlation of an early Cisuralian palynoflora from Bolivia

Global biostratigraphic comparison and correlation of an early Cisuralian palynoflora from Bolivia

Late Paleozoic small foraminifers (endothyrids) from South America (Ecuador and Bolivia)

Permian corals of Bolivia

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