Asociaciones palinologicas en las formaciones Los Monos (Devonico) e Itacua (Carbonifero Inferior) en Balapuca (Cuenca Tarija), sur de Bolivia: Parte 1. Formacion Los Monos.
Palynological assemblages present in Los Monos (Devonian) and Itacua (Lower Carboniferous) formations at Balapuca (Tarija basin), southern Bolivia. Part One. Los Monos Formation
| dc.contributor | en-US | |
| dc.contributor | es-ES | |
| dc.creator | di Pasquo, Mercedes | |
| dc.date | 2010-06-23 | |
| dc.identifier | http://www.andeangeology.cl/index.php/revista1/article/view/V34n1-a06 | |
| dc.identifier | 10.5027/andgeoV34n1-a06 | |
| dc.description | Se caracterizan cuali-cuantitativamente dos asociaciones palinologicas recuperadas de ocho muestras fertiles de la Formacion Los Monos (Eifeliano tardio-Frasniano temprano), expuesta en la localidad de Balapuca, ubicada en la margen boliviana del rio Bermejo en la sierra de San Telmo. Esta unidad depositada en la Cuenca Tarija, sobreyace a la Formacion Pescado (o Huamampampa, Emsiano-Eifeliano), y subyace, cuando esta preservada, a la Formacion Iquiri (Frasniano-Famenniano). La seccion litologica estudiada se compone principalmente de pelitas grises, laminadas o macizas, y areniscas con estructuras de corriente o bioturbadas. Restos de invertebrados y plantas fosiles fueron recuperados de distintos niveles, algunos de los cuales resultaron ademas, palinologicamente fertiles. La microflora en su totalidad aqui presentada se compone de 76 especies de palinomorfos, entre las cuales son dominantes las esporas trilete mientras que aparecen subordinados acritarcas, prasinofitas, criptosporas y quitinozoarios. Se describen dos especies nuevas de esporas, Leiotriletes balapucensis y Endoculeospora altobellii, ambas comprendidas en la asociacion mas joven. La distribucion estratigrafica de especies clave permitio reconocer dos asociaciones, una atribuida al Eifeliano tardio y la otra al Givetiano temprano tardio a Givetiano tardio. Ambas asociaciones comparten numerosas especies con otras microfloras coetaneas principalmente de Argentina, Bolivia, Brasil y fuera de America del Sur, en America del Norte y el oeste de Europa. | es-ES |
| dc.description | Two associations of palynomorphs recovered from eight samples from Los Monos Formation (late Eifelian-early Frasnian), cropping out at Balapuca, located at the Bolivian margin of the Bermejo River in the San Telmo range, are characterized. In the Tarija Basin, this unit overlies the Pescado (or Huamampampa) Formation (Emsian-Eifelian) and underlies the Iquiri Formation (Frasnian-Famennian), when it is preserved. The studied section is mainly composed of grey laminated or massive pelites and sandstones with current structures or bioturbation. Paleoinvertebrates and fossil plant debris were recovered from different levels, and some of them yielded palynomorphs. The whole microflora here presented is composed of 76 species, of which trilete spores are dominant and acritarchs, prasinophytes, cryptospores and chitinozoans are subordinately present. Two new species of spores, Leiotriletes balapucensis and Endoculeospora altobellii, both belonging to the youngest assemblage, are described. Two assemblages are recognized based on the stratigraphical distribution of diagnostic species, one attributed to the late Eifelian and the other to the late early Givetian to late Givetian. Both associations share several species with other coeval microfloras mainly from Argentina, Bolivia, Brazil, and beyond South America, from North America and western Europe. | en-US |
| dc.format | application/pdf | |
| dc.format | text/html | |
| dc.language | eng | |
| dc.publisher | Servicio Nacional de Geología y Minería | en-US |
| dc.relation | http://www.andeangeology.cl/index.php/revista1/article/view/V34n1-a06/443 | |
| dc.relation | http://www.andeangeology.cl/index.php/revista1/article/view/V34n1-a06/html | |
| dc.source | Andean Geology; Vol 34, No 1 (2007); 97-138 | es-ES |
| dc.source | Andean Geology; Vol 34, No 1 (2007); 97-138 | en-US |
| dc.source | 0718-7106 | |
| dc.source | 0718-7092 | |
| dc.title | Asociaciones palinologicas en las formaciones Los Monos (Devonico) e Itacua (Carbonifero Inferior) en Balapuca (Cuenca Tarija), sur de Bolivia: Parte 1. Formacion Los Monos. | es-ES |
| dc.title | Palynological assemblages present in Los Monos (Devonian) and Itacua (Lower Carboniferous) formations at Balapuca (Tarija basin), southern Bolivia. Part One. Los Monos Formation | en-US |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion | |
| dc.type | es-ES | |
| dc.type | en-US |
This item appears in the following Collection(s)
-
Andean Geology
[0-9]{4}