MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
artículos
Título:
Silurian Microplankton from the Cachipunco Formation (Santa Bárbara Range; Andina Central Basin), Jujuy, Northwestern Argentina
Autor/es:
DE INUNCIAGA, M.F; GUTIÉRREZ, PEDRO RAÚL
Revista:
Revista del Museo Argentino de Ciencias Naturales
Editorial:
Mueso Argentino de Ciencias Naturales "B. Rivadavia"
Referencias:
Lugar: Buenos Aires; Año: 2011 vol. 20 p. 147 - 147
ISSN:
1514-5158
Resumen:
The palynological content of Cachipunco Formation is described in this contribution. This formation lies in the Santa Barbara Range, Jujuy Province, and outcrops at two localities: Angosto Los Pereyras and Cumbre los Pereyras. The more complete succession is the one from Angosto Los Pereyras, where the formation comprises 273 m of dark siltstones interstratified with thin sandstones and without visible base or top. The microfloristic associations are 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 carminae Cramer, Proteolobus cylindricus Al-Ruwaili, Tylotopalla maraca Díez & Cramer, T. robustispinosa (Downie)Eisenack et al., Veryhachium trisphaeridium Downie, and Ambitisporites avitus Hoffmeister. According to the stratigraphic distribution of the theses species, the age of the Cachipunco Formation can be constrained to a Wenlockian-Ludlovian range. A new species is proposed Multiplicisphaeridium baldisii sp. nov.