Eolian permian deposits in west and northwest Argentina
The sedimentary and stratigraphic characteristics of eolian Permian deposits exposed in Mendoza, La Rioja and San Juan Provinces (west and northwest Argentina) are described in this paper. The eolianites are fine and medium sandstones with large-scale cross-bedding, multiple parallel truncation plan...
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todo:paper_00370738_v49_n1-2_p109_Limarino2023-10-03T14:48:05Z Eolian permian deposits in west and northwest Argentina Limarino, C.O. Spalletti, L.A. The sedimentary and stratigraphic characteristics of eolian Permian deposits exposed in Mendoza, La Rioja and San Juan Provinces (west and northwest Argentina) are described in this paper. The eolianites are fine and medium sandstones with large-scale cross-bedding, multiple parallel truncation planes and some asymmetrical ripples. Three genetic types of deposits have been identified: dune facies, eolian sand-sheet facies and mixed fluvial-eolian facies. Fine and medium sandstones with large-scale cross-bedding and multiple parallel truncation planes are here interpreted as dune deposits (mainly crescentic dunes), and unstratified or flat-bedded sandstones as eolian sand-sheet deposits. Mixed fluvial and eolian sequences, composed of sandstones, mudstones and some matrix-supported conglomerates, represent a transitional facies between those formed in eolian and fluvial environments. This considerable deposition of eolian sediments was probably brought about by the existence of an extensive, medium to low-latitude continent and the withdrawal of marine environments. The environments with highest aridity occurred towards the south and west of the region. The eolian circulation pattern was controlled by a long ensialic volcanic arc emerging towards the west of the basin. © 1986. Fil:Limarino, C.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00370738_v49_n1-2_p109_Limarino |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
The sedimentary and stratigraphic characteristics of eolian Permian deposits exposed in Mendoza, La Rioja and San Juan Provinces (west and northwest Argentina) are described in this paper. The eolianites are fine and medium sandstones with large-scale cross-bedding, multiple parallel truncation planes and some asymmetrical ripples. Three genetic types of deposits have been identified: dune facies, eolian sand-sheet facies and mixed fluvial-eolian facies. Fine and medium sandstones with large-scale cross-bedding and multiple parallel truncation planes are here interpreted as dune deposits (mainly crescentic dunes), and unstratified or flat-bedded sandstones as eolian sand-sheet deposits. Mixed fluvial and eolian sequences, composed of sandstones, mudstones and some matrix-supported conglomerates, represent a transitional facies between those formed in eolian and fluvial environments. This considerable deposition of eolian sediments was probably brought about by the existence of an extensive, medium to low-latitude continent and the withdrawal of marine environments. The environments with highest aridity occurred towards the south and west of the region. The eolian circulation pattern was controlled by a long ensialic volcanic arc emerging towards the west of the basin. © 1986. |
| format |
JOUR |
| author |
Limarino, C.O. Spalletti, L.A. |
| spellingShingle |
Limarino, C.O. Spalletti, L.A. Eolian permian deposits in west and northwest Argentina |
| author_facet |
Limarino, C.O. Spalletti, L.A. |
| author_sort |
Limarino, C.O. |
| title |
Eolian permian deposits in west and northwest Argentina |
| title_short |
Eolian permian deposits in west and northwest Argentina |
| title_full |
Eolian permian deposits in west and northwest Argentina |
| title_fullStr |
Eolian permian deposits in west and northwest Argentina |
| title_full_unstemmed |
Eolian permian deposits in west and northwest Argentina |
| title_sort |
eolian permian deposits in west and northwest argentina |
| url |
http://hdl.handle.net/20.500.12110/paper_00370738_v49_n1-2_p109_Limarino |
| work_keys_str_mv |
AT limarinoco eolianpermiandepositsinwestandnorthwestargentina AT spallettila eolianpermiandepositsinwestandnorthwestargentina |
| _version_ |
1807321408801341440 |