Geología de las planchas 135 San Gil y 151 Charalá: departamento de Santander

González, Orlando Pulido

doi:10.32685/0120-1425/bolgeol23.2.1980.377

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…En los mapas geológicos publicados (Pulido, 1979) (Vargas, Arias, Jaramillo & Téllez, 1981), las unidades mencionadas aparecen con denominaciones de formaciones sedimentarias del Cretáceo; en áreas de Aratoca, Curití y Mogotes las llaman formación Tambor, en Socorro, Oiba, Charalá, San Gil aparecen bajo las denominaciones de formación "La Paja Arenoso" y Formación Simití, en la zona de Guadalupe como "Areniscas de Chiquinquirá", en Gámbita, Togüi y Santa Ana "techo de la formación Arcabuco" (Renzoni, 1967).…”

Section: Distribución Geográfica De Las Vulcanitasunclassified

Additional Bats From the Middle Miocene La Venta Fauna of Colombia

Czaplewski,

Takai,

Naeher

et al. 2023

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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By screenwashing sedimentary rocks from the middle Miocene Villavieja Formation in the Río Magdalena valley, Huila Department, Colombia, yielded diverse bat fossils that contribute to the understanding of the approximately 12-13 million-year-old La Venta fauna. These newly collected specimens encompass an emballonurid, a noctilionid, three phyllostomids, a thyropterid, three molossids, and a probable vespertilionid. They originate from a stratigraphic level known as the Monkey Beds, dated between 12.5 million and 12.2 million years. Noteworthy findings include upper molars of Notonycteris magdalenensis, affirming its close relation to Vampyrum and Chrotopterus, and a novel species of Notonycteris, characterized by smaller size than N. magdalenensis based on two lower molars. Two upper molars from a primitive nectar-feeding bat introduce a new taxon of Phyllostomidae (Glossophaginae), representing a new genus and species and marking the only Tertiary record for this group. Another molossid, as yet unidentified, expands the bat diversity, and an unidentified probable vespertilionid constitutes the first family record in the La Venta fauna. In total, the La Venta fauna now encompasses 14 bat species, including some that remain indeterminate.

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Section: Distribución Geográfica De Las Vulcanitasunclassified

Additional Bats From the Middle Miocene La Venta Fauna of Colombia

Czaplewski,

Takai,

Naeher

et al. 2023

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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“…Several studies have been carried out in the Western Pampas, particularly in playa lakes, sandy plains and paleodune fields (e.g. González díaz 1981;iriondo 1999;cioccale 1999;Tripaldi & ForMan 2007;calMels & casadío 2004;záraTe & Tripaldi 2012, rojo et al 2012Tripaldi et al 2013;ForMan et al 2014). These studies have generated important information about aeolian processes, geology, geomorphology, and stratigraphy, which have contributed to understanding the effect of the large-scale wind patterns and climate change over time, particularly during the Holocene.…”

Section: Introductionmentioning

confidence: 99%

Last millennial environmental reconstruction based on a multi-proxy record from Laguna Nassau, Western Pampas, Argentina

Vilanova¹,

Schittek²,

Geilenkirchen³

et al. 2015

njgpa

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We present a multi-proxy record from Laguna Nassau (LN), a shallow lake which developed in a blowout depression in the semi-arid sandy lowlands of the Western Pampas of Argentina. This multi-proxy stacked record reveals the evolution of an incipient water body subjected to warm and dry conditions from ~900 to 770 cal yr BP, an interval that is coeval with the Medieval Climatic Anomaly (MCA) period. Vegetation was dominated locally by Typha, and regionally by the Espinal, represented by Celtis, along with psammophytic-halophytic communities in sand dunes and lowlands. After that, variable water-depths and unstable conditions occurred in the water body in relation to dry and humid climatic phases until ~200 cal yr BP, likely related to a transition from warm and dry conditions, corresponding to the MCA, to a colder and wet climatic setting during a period concurrent with the Little Ice Age (LIA). This water body evolved into a shallow lake since then, with a more stable and higher water level, and regional vegetation characterized by the Espinal and psammophytic-halophytic communities mantling and stabilizing the nearby sand dunes. This evolution suggests complex hydrological responses of LN likely associated with its sensitivity to climatic variability. Our results highlight important contrasts in hydrologic balance during the MCA and LIA along the western and northeastern Pampas, suggesting important shifts mainly in the South-American Summer Monsoon at centennial timescales over the last millennium.

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Geología de las planchas 135 San Gil y 151 Charalá: departamento de Santander

Cited by 2 publications

References 9 publications

Additional Bats From the Middle Miocene La Venta Fauna of Colombia

Additional Bats From the Middle Miocene La Venta Fauna of Colombia

Last millennial environmental reconstruction based on a multi-proxy record from Laguna Nassau, Western Pampas, Argentina

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