Silurian microplankton from the Cachipunco Formation (Santa Bárbara Range; Andina Central Basin), Jujuy, Argentina
- Autores: María Fernanda de Ininciaga, Pedro Gutierrez
- Localización: Revista del Museo Argentino de Ciencias Naturales, ISSN-e 1853-0400, ISSN 1514-5158, Vol. 13, Nº. 2, 2011, págs. 147-174
- Idioma: español
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Resumen
The palynological content of Cachipunco Formation is described in this contribution. This formationlies in the Santa Barbara Range, Jujuy Province, and outcrops at two localities: Angosto Los Pereyras and Cumbrelos Pereyras. The more complete succession is the one from Angosto Los Pereyras, where the formation comprises273 m of dark siltstones interstratified with thin sandstones and without visible base or top. The microfloristic associationsare characterized by the presence of: Ammonidium ludloviense (Lister) Dorning, Barbestiastra barbata(Downie) Sarjeant & Stancliffe, Domasia quadrispinosa Hill, Leiofusa exilata Dorning, L. parvitatis Loeblich,Multiplicisphaeridium arbusculum Dorning, M. eoplancktonicum (Eisenack) Lister, Neoveryhachium carminaeCramer, Proteolobus cylindricus Al-Ruwaili, Tylotopalla maraca Díez & Cramer, T. robustispinosa (Downie)Eisenack et al., Veryhachium trisphaeridium Downie, and Ambitisporites avitus Hoffmeister. According to thestratigraphic distribution of the theses species, the age of the Cachipunco Formation can be constrained to aWenlockian-Ludlovian range. A new species is proposed Multiplicisphaeridium baldisii sp. nov.
