Angiosperm flora of Pico Quemado, Ñirihuau Formation (late Oligocene), Río Negro Province, Argentina

Pico Quemado is located East of San Carlos de Bariloche, and stratigraphically placed in the lower member of the Ñirihuau Formation (late Oligocene - middle early Miocene). Fossil leaves (compressions and/or impressions) of dicotyledonous angiosperms were studied and twenty two morphotypes are descr...

Descripción completa

Guardado en:
Detalles Bibliográficos
Publicado: 2014
Materias:
Argentina
Cenozoic
Fossil angiosperms
Patagonia
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v51_n3_p209_Caviglia
http://hdl.handle.net/20.500.12110/paper_00027014_v51_n3_p209_Caviglia
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00027014_v51_n3_p209_Caviglia
record_format dspace
spelling paper:paper_00027014_v51_n3_p209_Caviglia2023-06-08T14:22:28Z Angiosperm flora of Pico Quemado, Ñirihuau Formation (late Oligocene), Río Negro Province, Argentina Argentina Cenozoic Fossil angiosperms Patagonia Pico Quemado is located East of San Carlos de Bariloche, and stratigraphically placed in the lower member of the Ñirihuau Formation (late Oligocene - middle early Miocene). Fossil leaves (compressions and/or impressions) of dicotyledonous angiosperms were studied and twenty two morphotypes are described. The families identified were Nothofagaceae, Myrtaceae, Rosaceae, Myricaceae, Malvaceae and Fabaceae and the genus Nothofagus Blume was found to be the dominant. The macroflora is compared with twenty two tertiary paleofloras from Patagonia, and similarity indices obtained by the Jaccard coefficient, yielded values less than 13%. This low index could be explained as due to the younger age of the Pico Quemado paleoflora compared to most of the other paleofloras and/or because it thrived at a lower paleolatitude. The paleofloristic analysis suggests a temperate to cold-temperate climate and no analogous vegetation among other known Patagonian fossil floras. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v51_n3_p209_Caviglia http://hdl.handle.net/20.500.12110/paper_00027014_v51_n3_p209_Caviglia
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
Cenozoic
Fossil angiosperms
Patagonia
spellingShingle Argentina
Cenozoic
Fossil angiosperms
Patagonia
Angiosperm flora of Pico Quemado, Ñirihuau Formation (late Oligocene), Río Negro Province, Argentina
topic_facet Argentina
Cenozoic
Fossil angiosperms
Patagonia
description Pico Quemado is located East of San Carlos de Bariloche, and stratigraphically placed in the lower member of the Ñirihuau Formation (late Oligocene - middle early Miocene). Fossil leaves (compressions and/or impressions) of dicotyledonous angiosperms were studied and twenty two morphotypes are described. The families identified were Nothofagaceae, Myrtaceae, Rosaceae, Myricaceae, Malvaceae and Fabaceae and the genus Nothofagus Blume was found to be the dominant. The macroflora is compared with twenty two tertiary paleofloras from Patagonia, and similarity indices obtained by the Jaccard coefficient, yielded values less than 13%. This low index could be explained as due to the younger age of the Pico Quemado paleoflora compared to most of the other paleofloras and/or because it thrived at a lower paleolatitude. The paleofloristic analysis suggests a temperate to cold-temperate climate and no analogous vegetation among other known Patagonian fossil floras.
title Angiosperm flora of Pico Quemado, Ñirihuau Formation (late Oligocene), Río Negro Province, Argentina
title_short Angiosperm flora of Pico Quemado, Ñirihuau Formation (late Oligocene), Río Negro Province, Argentina
title_full Angiosperm flora of Pico Quemado, Ñirihuau Formation (late Oligocene), Río Negro Province, Argentina
title_fullStr Angiosperm flora of Pico Quemado, Ñirihuau Formation (late Oligocene), Río Negro Province, Argentina
title_full_unstemmed Angiosperm flora of Pico Quemado, Ñirihuau Formation (late Oligocene), Río Negro Province, Argentina
title_sort angiosperm flora of pico quemado, ñirihuau formation (late oligocene), río negro province, argentina
publishDate 2014
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v51_n3_p209_Caviglia
http://hdl.handle.net/20.500.12110/paper_00027014_v51_n3_p209_Caviglia
_version_ 1768542622250434560

Ejemplares similares