Artículo
Abstract:
Palaeomagnetic data for a sequence of late Cenozoic sediments exposed at Bajada Martinez de Hoz and El Muelle (Barranca de los Lobos, Atlantic coastal area; Buenos Aires Province) are reported. The sequence comprises sediments assigned to the Chapadmalal Formation (Montehermosense land-mammal age), Barranca de los Lobos, Vorohué and San Andrés Formations (Uquiense land-mammal age), Miramar Formation (Ensenadense land-mammal age), and Arroyo Seco and Arroyo Loberia Formations (Lujanense land-mammal age). The magnetostratigraphy recorded in the sequence suggests a Brunhes magnetic age (< 0.73 Ma) for the Arroyo Loberia and upper section of Arroyo Seco Formations; a late Matuyama magnetic age (1.67-0.73 Ma) for the lower section of the Arroyo Seco Formation; a Matuyama magnetic age (sensu lato 2.48-0.73 Ma) for the Miramar Formation; a Gauss magnetic age (sensu lato 3.40-2.48 Ma) for the San Andrés, Vorohué and Barranca de los Lobos formations; and an early Gauss to Gilbert magnetic age (> 3.15 Ma) for the Chapadmalal Formation. It also suggests a Brunhes to late Matuyama magnetic age for the Lujanense land-mammal age; a Matuyama magnetic age for the Ensenadense land-mammal age; a Gauss magnetic age for the Uquiense land-mammal age; and an early Gauss to Gilbert magnetic age for the Montehermosense land-mammal age. Finally, the results obtained suggest that the Panama Isthmus was formed at an age earlier than 3.0 Ma, possibly 4.0-3.5 Ma ago. © 1990.
Registro:
| Documento: | Artículo |
| Título: | Palaeomagnetism of late Cenozoic fossiliferous sediments from Barranca de los Lobos (Buenos Aires Province, Argentina). The magnetic age of the South American land-mammal ages |
| Autor: | Orgeira, M.J. |
| Filiación: | Laboratorio de Paleomagnetismo Daniel Valencio, Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellon II, 1428 Buenos Aires, Argentina |
| Palabras clave: | Brunhes; Cainozoic; Gauss; land mammal age; magnetostratigraphy; Matuyama; palaeomagnetism; Argentina, Buenos Aires, Barranca de los Lobos |
| Año: | 1990 |
| Volumen: | 64 |
| Número: | 2-4 |
| Página de inicio: | 121 |
| Página de fin: | 132 |
| DOI: | http://dx.doi.org/10.1016/0031-9201(90)90032-S |
| Título revista: | Physics of the Earth and Planetary Interiors |
| Título revista abreviado: | Phys. Earth Planet. Inter. |
| ISSN: | 00319201 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319201_v64_n2-4_p121_Orgeira |
Referencias:
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- Bobbio, Devincenzi, Orgeira, Valencio, La magnetoestratigrafia del Ensenadense y Bonaerense de la Ciudad de La Plata (excavación Nuevo Teatro Argentino) (1986) Rev. Asoc. Geol. Argent. XLI, 1-2, pp. 7-22
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Citas:
---------- APA ----------
(1990) . Palaeomagnetism of late Cenozoic fossiliferous sediments from Barranca de los Lobos (Buenos Aires Province, Argentina). The magnetic age of the South American land-mammal ages. Physics of the Earth and Planetary Interiors, 64(2-4), 121-132.http://dx.doi.org/10.1016/0031-9201(90)90032-S
---------- CHICAGO ----------
Orgeira, M.J. "Palaeomagnetism of late Cenozoic fossiliferous sediments from Barranca de los Lobos (Buenos Aires Province, Argentina). The magnetic age of the South American land-mammal ages" . Physics of the Earth and Planetary Interiors 64, no. 2-4 (1990) : 121-132.http://dx.doi.org/10.1016/0031-9201(90)90032-S
---------- MLA ----------
Orgeira, M.J. "Palaeomagnetism of late Cenozoic fossiliferous sediments from Barranca de los Lobos (Buenos Aires Province, Argentina). The magnetic age of the South American land-mammal ages" . Physics of the Earth and Planetary Interiors, vol. 64, no. 2-4, 1990, pp. 121-132.http://dx.doi.org/10.1016/0031-9201(90)90032-S
---------- VANCOUVER ----------
Orgeira, M.J. Palaeomagnetism of late Cenozoic fossiliferous sediments from Barranca de los Lobos (Buenos Aires Province, Argentina). The magnetic age of the South American land-mammal ages. Phys. Earth Planet. Inter. 1990;64(2-4):121-132.http://dx.doi.org/10.1016/0031-9201(90)90032-S
