The neopaleozoic sequence of the Agua de Jagüel Creek (Precordillera de Mendoza): Age and stratigraphic redefinition
The name of the Cordón de Jagüel Formation is proposed for Permian sandstones, mudstones and scarce conglomerates that form the western slope of the Cordón de Agua de Jagüel range in the Precordillera (Mendoza Province). These rocks unconformably overlie low-grade metamorphic rocks belonging to the...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00044822_v70_n2_p216_Limarino |
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todo:paper_00044822_v70_n2_p216_Limarino2023-10-03T13:59:00Z The neopaleozoic sequence of the Agua de Jagüel Creek (Precordillera de Mendoza): Age and stratigraphic redefinition Limarino, C.O. Isbell, J.L. Ciccioli, P.L. Taboada, A.C. Cordón de Jagüel Formation Early Permian Gondwana Precordillera age determination conglomerate facies analysis Gondwana metamorphic rock mudstone Paleozoic Permian sandstone sea level change sequence stratigraphy storm deposit Argentina Mendoza Precordillera Invertebrata Lueckisporites The name of the Cordón de Jagüel Formation is proposed for Permian sandstones, mudstones and scarce conglomerates that form the western slope of the Cordón de Agua de Jagüel range in the Precordillera (Mendoza Province). These rocks unconformably overlie low-grade metamorphic rocks belonging to the Villavicencio Formation and are separated by a fault from sandstones, mudstones and diamictites of the Agua de Jagüel Formation (Pennsylvanian). Six facies association have been recognized in the Cordón de Jagüel Formation. The association 1 is composed of conglomerates and coarse-grained sandstones deposited in fluvial environment. The onset of a sea-level rise is recorded in the facies association 2, which is formed by sandstones and carbonaceous mudstones sedimented in transitional environments (estuarine?). Facies association 3 is made up by fine-grained sandstones indicating the transition to coastal marine settings while facies association 4, formed by large-scale cross-bedded sandstones, was very probably deposited in subtidal coastal environments. A progressive shallowing appears in the carbonaceous mudstones, fine-grained sandstones and marls forming the facies association 5 deposited in a transitional environment (lagoons). Finally, facies association 6 (shales and fine-grained sandstones) indicates a new sea level rise. Remains of the marine invertebrates belonging to the Costatumulus Biozone and palynofloras containing Lueckisporites virkkiae Potonié and Klaus suggest an early Permian age, probably late Cisuralian, for the unit.litic layer. Proximal non-amalgamated storm deposits are represented by thick sandy beds with hummocky cross stratification, bioclastic accumulations and ripples at the top intercalated with thin shaly levels. Distal storm deposits are thinly laminated o massive silty to sandy beds intercalated in shaly intervals. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v70_n2_p216_Limarino |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Cordón de Jagüel Formation Early Permian Gondwana Precordillera age determination conglomerate facies analysis Gondwana metamorphic rock mudstone Paleozoic Permian sandstone sea level change sequence stratigraphy storm deposit Argentina Mendoza Precordillera Invertebrata Lueckisporites |
| spellingShingle |
Cordón de Jagüel Formation Early Permian Gondwana Precordillera age determination conglomerate facies analysis Gondwana metamorphic rock mudstone Paleozoic Permian sandstone sea level change sequence stratigraphy storm deposit Argentina Mendoza Precordillera Invertebrata Lueckisporites Limarino, C.O. Isbell, J.L. Ciccioli, P.L. Taboada, A.C. The neopaleozoic sequence of the Agua de Jagüel Creek (Precordillera de Mendoza): Age and stratigraphic redefinition |
| topic_facet |
Cordón de Jagüel Formation Early Permian Gondwana Precordillera age determination conglomerate facies analysis Gondwana metamorphic rock mudstone Paleozoic Permian sandstone sea level change sequence stratigraphy storm deposit Argentina Mendoza Precordillera Invertebrata Lueckisporites |
| description |
The name of the Cordón de Jagüel Formation is proposed for Permian sandstones, mudstones and scarce conglomerates that form the western slope of the Cordón de Agua de Jagüel range in the Precordillera (Mendoza Province). These rocks unconformably overlie low-grade metamorphic rocks belonging to the Villavicencio Formation and are separated by a fault from sandstones, mudstones and diamictites of the Agua de Jagüel Formation (Pennsylvanian). Six facies association have been recognized in the Cordón de Jagüel Formation. The association 1 is composed of conglomerates and coarse-grained sandstones deposited in fluvial environment. The onset of a sea-level rise is recorded in the facies association 2, which is formed by sandstones and carbonaceous mudstones sedimented in transitional environments (estuarine?). Facies association 3 is made up by fine-grained sandstones indicating the transition to coastal marine settings while facies association 4, formed by large-scale cross-bedded sandstones, was very probably deposited in subtidal coastal environments. A progressive shallowing appears in the carbonaceous mudstones, fine-grained sandstones and marls forming the facies association 5 deposited in a transitional environment (lagoons). Finally, facies association 6 (shales and fine-grained sandstones) indicates a new sea level rise. Remains of the marine invertebrates belonging to the Costatumulus Biozone and palynofloras containing Lueckisporites virkkiae Potonié and Klaus suggest an early Permian age, probably late Cisuralian, for the unit.litic layer. Proximal non-amalgamated storm deposits are represented by thick sandy beds with hummocky cross stratification, bioclastic accumulations and ripples at the top intercalated with thin shaly levels. Distal storm deposits are thinly laminated o massive silty to sandy beds intercalated in shaly intervals. |
| format |
JOUR |
| author |
Limarino, C.O. Isbell, J.L. Ciccioli, P.L. Taboada, A.C. |
| author_facet |
Limarino, C.O. Isbell, J.L. Ciccioli, P.L. Taboada, A.C. |
| author_sort |
Limarino, C.O. |
| title |
The neopaleozoic sequence of the Agua de Jagüel Creek (Precordillera de Mendoza): Age and stratigraphic redefinition |
| title_short |
The neopaleozoic sequence of the Agua de Jagüel Creek (Precordillera de Mendoza): Age and stratigraphic redefinition |
| title_full |
The neopaleozoic sequence of the Agua de Jagüel Creek (Precordillera de Mendoza): Age and stratigraphic redefinition |
| title_fullStr |
The neopaleozoic sequence of the Agua de Jagüel Creek (Precordillera de Mendoza): Age and stratigraphic redefinition |
| title_full_unstemmed |
The neopaleozoic sequence of the Agua de Jagüel Creek (Precordillera de Mendoza): Age and stratigraphic redefinition |
| title_sort |
neopaleozoic sequence of the agua de jagüel creek (precordillera de mendoza): age and stratigraphic redefinition |
| url |
http://hdl.handle.net/20.500.12110/paper_00044822_v70_n2_p216_Limarino |
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