Mostrar el registro sencillo del ítem
dc.contributor.author
Poire, Daniel Gustavo
dc.date.available
2024-04-22T13:36:44Z
dc.date.issued
2013
dc.identifier.citation
Modern stromatolites from the Andean lakes: Unlocking ancient stromatolitic sedimentary models; 6th Latin American Congress of Sedimentology; San Pablo; Brasil; 2013; 7-7
dc.identifier.uri
http://hdl.handle.net/11336/233749
dc.description.abstract
Modern carbonate-stromatolite occurrence has often related with the sea (e.g., Shark Bay, Australia; Exuma Sound, Bahamas in the Caribbean sea) or with littoral pools or channels (e.g., Lagoa Salgada, Brazil; Laguna Bacalar, Mexico; Lagoon Coorong, Australia; Solar Lake, in the Sinai Peninsula, Egypt), always connected with the sea. The discovery of modern gypsum-stromatolites from Cuatro Ci´enagas, Mexico, in a continental playa-lake (800 masl) and carbonate-stromatolites in Andean Lakes from Argentina and Chile (more than 3500 masl) have been considered as a significant advance in their scientific knowledge. These stromatolites in the Puna region are been growing in very extreme environmental conditions in the Socompa, Diamante, Tolar Grande and Negra lakes (Argentina) and Tebenquiche and La Brava lakes in Chile. The Puna represents a large basin that is fragmented into a system of minor interrelated basins demarcated by mountains. Its climate is arid, with annual precipitation less than 350 mm, and daily temperatures range from -10 to 20◦C in summer and -15 to 10◦C in winter. Due to its high altitude and low latitude geographical position, the Puna region is exposed to high solar irradiance (∼165% of the value at the sea level), especially in the UV-B region, where the instantaneous flux can reach up to 17 W/m2 . Due to the extreme environmental conditions, such as residual volcanic activity associated with sulphur availability, hypersalinity, high UV irradiation, low O2 pressure and low nutrient availability, these modern stromatolite-like ecosystems constitute excellent models to study geochemical cycles and biogeochemical interactions during the early Earth. Moreover, these lakes are good laboratories to try to test the hypothesis that similar microbial mat community produce different organosedimentary structures depending of the physico-chemical environmental conditions (Logan’s stromatolite model). By the other hand, during the Precambrian deposition of Villa M´onica Formation, Tandilia System, Argentina, and the Mina Verd´un Group, Uruguay, the stromatolite morphology distinguished suggest that the mesoscale arrangements have been produced by the sedimentological condition as Logan’s ideas said.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Universidad de San Pablo
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
MODERN STROMATOLITES
dc.subject
HIGH ALTITUDE LAKES
dc.subject
ANDEAN RANGES
dc.subject
STROMATOLITE MODELS
dc.subject.classification
Geociencias multidisciplinaria
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Modern stromatolites from the Andean lakes: Unlocking ancient stromatolitic sedimentary models
dc.type
info:eu-repo/semantics/publishedVersion
dc.type
info:eu-repo/semantics/conferenceObject
dc.type
info:ar-repo/semantics/documento de conferencia
dc.date.updated
2024-04-15T17:36:12Z
dc.journal.pagination
7-7
dc.journal.pais
Brasil
dc.journal.ciudad
San Pablo
dc.description.fil
Fil: Poire, Daniel Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.conicet.rol
Autor
dc.coverage
Internacional
dc.type.subtype
Congreso
dc.description.nombreEvento
6th Latin American Congress of Sedimentology
dc.date.evento
2013-07-14
dc.description.ciudadEvento
San Pablo
dc.description.paisEvento
Brasil
dc.type.publicacion
Book
dc.description.institucionOrganizadora
Universidade de São Paulo
dc.source.libro
Proceedings of the 6th Latin American Congress of Sedimentology
dc.date.eventoHasta
2013-07-17
dc.type
Congreso
Archivos asociados