Late Cretaceous (Campanian/Maastrichtian) freshwater to restricted marine mollusc fauna from the Loncoche Formation, Neuquén Basin, west-central Argentina

Parras, Ana; Griffin, Miguel

doi:10.1016/j.cretres.2012.07.002

Cited by 27 publications

(13 citation statements)

References 27 publications

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“…Within the ridge‐forming limestone beds, marine fossils have been documented by Aguirre‐Urreta et al . () and Parras & Griffin (), which along with distinctive glauconitic sandstones in the lower Malargüe Group indicate a marine environment in the latest Cretaceous–early Cenozoic.…”

Section: Results and Interpretationsmentioning

confidence: 97%

“…Oolitic grainstone (Lo) requires warm surface temperatures, constant wave action, and water saturated to supersaturated in calcium carbonate (Tucker & Wright, 1990) in shallow marine or lacustrine settings. Within the ridge-forming limestone beds, marine fossils have been documented by Aguirre-Urreta et al (2011) and Parras & Griffin (2013), which along with distinctive glauconitic sandstones in the lower Malarg€ ue Group indicate a marine environment in the latest Cretaceous-early Cenozoic.…”

Section: Malarg€ Ue Groupmentioning

confidence: 99%

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Basin evolution of Upper Cretaceous–Lower Cenozoic strata in the Malargüe fold‐and‐thrust belt: northern Neuquén Basin, Argentina

Balgord

Carrapa

2015

Basin Research

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The Andean Orogen is the type-example of an active Cordilleran style margin with a long-lived retroarc fold-and-thrust belt and foreland basin. Timing of initial shortening and foreland basin development in Argentina is diachronous along strike, with ages varying by 20-30 million years. The Neuquén Basin (32° S to 40° S) contains a thick sedimentary sequence ranging in age from late Triassic to Cenozoic, which preserves a record of rift, back arc, and foreland basin environments. Since much of the primary evidence for initial uplift has been Accepted ArticleThis article is protected by copyright. All rights reserved. overprinted or covered by younger shortening and volcanic activity, basin strata provide the most complete record of early mountain building. Detailed sedimentology and new maximum depositional ages obtained from detrital zircon U-Pb analyses from the Malargüe fold-and-thrust-belt (35˚ S) record a facies change between the marine evaporites of the Huitrín Formation (~122 Ma) and the fluvial sandstones and conglomerates of the Diamante Formation (~95 Ma). A 25-30 million year unconformity between the Huitrín and Diamante formations represents the transition from post-rift thermal subsidence to forebulge erosion during initial flexural loading related to crustal shortening and uplift along the magmatic arc to the west by at least 97 ± 2 Ma. This change in basin style is not marked by any significant difference in provenance and detrital zircon signature. A distinct change in detrital zircons, sandstone composition, and paleocurrent direction from west directed to east directed occurs instead in the middle Diamante Formation and may reflect the Late Cretaceous transition from forebulge derived sediment in the distal foredeep to proximal foredeep material derived from the thrust belt to the west. This change in paleoflow represents the migration of the forebulge, and therefore, the foreland basin system between 80 and 90 Ma in the Malargüe area.

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Section: Results and Interpretationsmentioning

confidence: 97%

Section: Malarg€ Ue Groupmentioning

confidence: 99%

Basin evolution of Upper Cretaceous–Lower Cenozoic strata in the Malargüe fold‐and‐thrust belt: northern Neuquén Basin, Argentina

Balgord

Carrapa

2015

Basin Research

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“…Other ostracod species from the Bauru Basin have a more widespread distribution in South America. For example, Ilyocypris argentinensis from the Adamantina Formation (Gobbo-Rodrigues et al, 1999a) is also found in the Loncoche Formation of the Cam-panianeMaastrichtian in Argentina (Uliana and Musacchio, 1978;Parras and Griffin, 2013). Ilyocypris riograndensis is found in several localities in Adamantina (Dias-Brito et al, 2001) and Araçatuba formations (Gobbo-Rodrigues et al, 1999b) and is also described in the Plottier, Bajo de la Carpa and Anacleto formations of the upper Coniacian-Campanian in Argentina (Musacchio and Valati, 2007;Carignano and Varela, 2011).…”

Section: Analysis Of the Stratigraphic Ranges Of Selected Fossilsmentioning

confidence: 99%

The South American retroarc foreland system: The development of the Bauru Basin in the back-bulge province

Menegazzo

Catuneanu

Chang

2016

Marine and Petroleum Geology

118

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The aim of this research is to understand the tectonic setting of the Bauru Basin. This basin in centraleastern South America has been classified as intracratonic, but the basin-fill geometry, the involved subsidence mechanisms and the age of the deposits are poorly understood. In this work, the ranges of the fossil taxa are analyzed and ages are proposed for the lithostratigraphic units. Isopach maps were used to reconstruct the stratigraphic intervals of the basin fill. The stratigraphy of the Bauru Basin is compared with that of the adjacent basins, and the data are integrated with the available information on South American geodynamics. The fossil record indicates that sediment accumulated from the Cenomanian to early Paleocene, beginning after the Mochica Phase of the Andean orogeny. The basin-fill geometry demonstrates migration of the depocenter through time, which occurred simultaneously with migration of the Andean Basin and immediately after the orogenic events of the Peruvian Phase. We propose that the Bauru Basin is a component of a retroarc foreland system developed during the early stages of the Andean evolution and that it was developed in the back-bulge province of this system. The Andean Basin constitutes the foredeep depozone of this foreland system (including the Potosí, Oriente, Acre and Marañon basins). In addition, the Upper Cretaceous of the Parecis and Solimões basins were likely also developed in the back-bulge province. The thickness of the Bauru accumulation indicates that other mechanisms might have overlapped the flexural subsidence in this back-bulge province.

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“…In Argentina, invertebrate records represent an important component of the continental Mesozoic faunas, and are typified mainly by arthropods (spinicaudatans = ‘conchostracans,’ insects, and ostracods) and freshwater mollusks (bivalves and gastropods) (e.g., Papú, 1993; Morton and Herbst, 2001; Camacho and Del Río, 2007; Griffin and Varela, 2012; Parras and Griffin, 2013; Lara et al, 2017; Carignano and Zavattieri, 2018; Carignano et al, 2018). The highest diversity of continental fossil invertebrates from the Argentinean Triassic sequences derives mainly from two basins: (1) the Ischigualasto-Villa Unión Basin (= Bermejo Basin) in La Rioja and San Juan provinces, and (2) the Cuyana Basin (= Cuyo Basin) in Mendoza and San Juan provinces.…”

Section: Introductionmentioning

confidence: 99%

An enigmatic Arthropoda from the Upper Triassic (Carnian) southwestern Gondwana (Argentina)

Lara

Cariglino²,

Zavattieri³

et al. 2019

J. Paleontol.

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The presence of a new taxon, Duraznovis gallegoi new genus new species is reported and described from an early Late Triassic (Carnian) deposit in Argentina. Two specimens, recovered from the Quebrada del Durazno locality, uppermost levels of the Potrerillos Formation, Cuyana Basin (Mendoza), are represented by the molds of their shield and imprints of soft parts. The identity of these specimens appears enigmatic but closely resembles in the possession of a generalized arthropod morphology and a distinctive combination of characters, to living and fossil representatives of xiphosurans (Chelicerata) and notostracans (Branchiopoda). The new fossils are associated with a rich biota comprising abundant insects, spinicaudatans, plants, and scarce fish remains living in semipermanent swamps and/or ponds within a delta plain environment with intermittent episodes of flooding, in a warm temperate and humid megamonsoonal climate during Triassic times. In this context, we analyze the taphonomic and ecological implications of their presence. Lastly, these unique specimens at the Quebrada del Durazno locality adds to the diversity of the biota, revealing the importance of this site as an exceptional paleontological Triassic deposit.UUID: http://zoobank.org/8d1194c2-170c-4b7a-b0c6-5c08b0974d95

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Late Cretaceous (Campanian/Maastrichtian) freshwater to restricted marine mollusc fauna from the Loncoche Formation, Neuquén Basin, west-central Argentina

Cited by 27 publications

References 27 publications

Basin evolution of Upper Cretaceous–Lower Cenozoic strata in the Malargüe fold‐and‐thrust belt: northern Neuquén Basin, Argentina

Basin evolution of Upper Cretaceous–Lower Cenozoic strata in the Malargüe fold‐and‐thrust belt: northern Neuquén Basin, Argentina

The South American retroarc foreland system: The development of the Bauru Basin in the back-bulge province

An enigmatic Arthropoda from the Upper Triassic (Carnian) southwestern Gondwana (Argentina)

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