Geology of Península Valdés

Haller, Miguel J.

doi:10.1007/978-3-319-48508-9_2

Cited by 5 publications

(9 citation statements)

References 18 publications

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“…See Gross et al (2015) for a review of the matter. In reference with the southern limit of the "Paranense" Sea, some authors placed it a few kilometers south of the Valdés Peninsule (Camacho, 1967;Scasso and del Río, 1987;del Río, 2000;Bellosi, 1995;Cione et al 2011;Cuitiño et al, 2017), whilst others, because of considering sedimentites of the "Patagoniense"Sea as deposited by the "Paranense" Sea, extended its boundary to the southernmost tip of Argentina.…”

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confidence: 99%

Dating late Miocene marine incursions across Argentina and Uruguay with Sr-isotope stratigraphy

Río

Martínez

McArthur

et al. 2018

Journal of South American Earth Sciences

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A Miocene Sr-isotope chronostratigraphy of the sedimentites deposited by the "Paranense" Sea along a NE-SW transect stretching for 1200 km along the southwestern Atlantic coast is performed herein. Determined numerical ages are presented and discussed for shells of Aequipecten paranensis from the Argentinean Puerto Madryn Formation, Facies Balneario La Lobería, "Entrerriense Beds" of the Salado Basin, and Paraná Formation, and from the Camacho Formation (Uruguay). The 87 Sr/ 86 Sr ages fall into five age-groups that embrace the "Paranense" flooding in the latest Serravalian-Messinian interval. For the Puerto Madryn Formation, the ages span the latest Serravalian to the Tortonian and are stratigraphically coherent with the Transgressive Phase (11.90-10.37 Ma) and the Regressive Phases (10.22-9.82 Ma and 9.40-9.05 Ma) of that unit. Ages of 8.85-7.95 Ma for the "Entrerriense Beds" show them to be Tortonian and the Facies Balneario La Lobería, and the Paraná and Camacho formations span the age-range 7.50-6.0 Ma, comprising the Tortonian-Messinian interval. These ages allow correlation of the base of the Barranca Formation with the Regressive Phase of the Puerto Madryn Formation and its middle horizons with the Facies Balneario La Lobería. The "Entrerriense Beds" are correlated with the "Beds of Cabo Buentiempo". Dating the "Paranense" marine incursion permits a reappraisal of its paleogeography and to differentiate their deposits from those of the "Patagoniense" Sea. The flooding surface was more reduced than previously thought being its northwesternmost limit in the surroundings of the Santa Fe Province and its southernmost boundary in southern Santa Cruz Province. Moreover, our results proved that the Paranaian Molluscan Bioprovince was coeval with the Valdesian Molluscan Bioprovince for 2.35 Ma and that the species that constituted the Aequipecten paranensis Zone lived for at least 5.9 Ma .

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confidence: 99%

Dating late Miocene marine incursions across Argentina and Uruguay with Sr-isotope stratigraphy

Río

Martínez

McArthur

et al. 2018

Journal of South American Earth Sciences

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“…Two successive marine transgressions flooded part of northern Patagonia during the Miocene, and both are recorded in the Península Valdés region: the ‘Patagoniense’ (Early Miocene) represented by the Gaiman Formation and the ‘Paranense’ (Middle–Late Miocene) represented by the Puerto Madryn Formation (e.g. Malumián et al 1999; Haller et al 2001; Malumián and Nañez 2008; Cuitiño et al 2015; del Río et al 2018).…”

Section: The Miocene Biostratigraphic Record From the Península Valdésmentioning

confidence: 99%

“…The Gaiman Formation ( sensu Haller and Mendía 1980) essentially consists of claystone, siltstones, tuffaceous mudstones, tuffs, and sandstones (Haller 2017). This formation is poorly exposed in the Península Valdés region.…”

Section: The Miocene Biostratigraphic Record From the Península Valdésmentioning

confidence: 99%

“…The Pen ınsula Vald es is located on the northern Patagonian coast of Argentina, between parallels 42 05 0 and 42 53 0 S and meridians 63 05 0 and 64 37 0 W, and it covers an area of 3600 km 2 . The surface of Pen ınsula Vald es comprises Neogene and Quaternary rocks, which are characterized by plateaus, sea cliffs, and spits as well as depressions caused by a complex process of tectonic deflation, fluvial erosion, and mass wasting (Haller 2017). The oldest deposits cropping out in this area are referred to the Lower Miocene Gaiman Formation (Haller and Mend ıa 1980).…”

Section: Geological Setting and Lithostratigraphymentioning

confidence: 99%

“…The Middle to Upper Miocene Puerto Madryn Formation rests uncomfortably upon the Gaiman Formation (Haller 1979). On these sediments rest the Pliocene-Lower Pleistocene Patagonian Gravels, separated by an unconformity (Haller 2017). The Patagonian Gravels represent the highest level of aggradation in the Pen ınsula Vald es region.…”

Section: Geological Setting and Lithostratigraphymentioning

confidence: 99%

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Miocene dinoflagellate cyst biostratigraphy of the Península Valdés, Patagonia, Argentina

Fuentes

2023

Palynology

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The present work documents the stratigraphic distribution of dinoflagellate cysts from the upper part (60-585 m) of the YPF.Ch. PV. es-1 borehole, Pen ınsula Vald es, Argentina. The assemblages exhibit a relatively moderate to low diversity. Most samples are characterized by frequent to abundant taxa of the order Gonyaulacales, such as Spiniferites/Achomosphaera spp., Reticulatosphaera actinocoronata, Operculodinium centrocarpum, and Melitasphaeridium choanophorum. Furthermore, a continuous succession of Early Miocene-Late Miocene diagnostic dinoflagellate cyst events was recorded for the first time from the Pen ınsula Vald es region. Eight diagnostic events of highest occurrences (HOs) of dinoflagellate cyst taxa are identified. These bioevents allowed a subdivision of the sedimentary succession into two well-defined stratigraphic sections: Early to Middle Miocene (Burdigalian-Langhian/probably Serravalian, 430/425-330/325 m) based on the HOs of Emmetrocysta urnaformis, Cannosphaeropsis quattrocchiae, Cousteaudinium auybriae, and Cleistosphaeridium ancyreum, and Late Miocene (Tortonian-Messinian, between 175-170 and 80/85 m) based on the HOs of Labyrinthodinium truncatum subsp. truncatum, Operculodinium piaseckii, and Reticulatosphaera actinocoronata. The ranges of these taxa are compared with well-documented information on Neogene dinoflagellate cysts recorded from different sites across the North and South Atlantic Ocean and adjacent seas. In general, the dinoflagellate cyst assemblages, as well as the selected diagnostic taxa, exhibit a clear similarity to those of the Northern Hemisphere. The only exception is Hystrichokolpoma rigaudiae, which is asynchronous, possibly indicating local paleoenvironmental conditions.

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Urban Growth in the Coast of Puerto Madryn (Chubut, Argentina): Impacts on Coastal Dune Field and Implications for Coastal Planning

Bunicontro

Marcomini

2021

Advances in Geomorphology and Quaternary Studies in Argentina

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Geology of Península Valdés

Cited by 5 publications

References 18 publications

Dating late Miocene marine incursions across Argentina and Uruguay with Sr-isotope stratigraphy

Dating late Miocene marine incursions across Argentina and Uruguay with Sr-isotope stratigraphy

Miocene dinoflagellate cyst biostratigraphy of the Península Valdés, Patagonia, Argentina

Urban Growth in the Coast of Puerto Madryn (Chubut, Argentina): Impacts on Coastal Dune Field and Implications for Coastal Planning

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