An Oligocene microthermal forest dominated by Nothofagus in Sierra Baguales, Chilean Patagonia: Response to global cooling and tectonic events

Gutiérrez, Néstor M.; Pino, Juan Pablo; Roux, J.P. Le; Pedroza, Viviana; Oyarzún, José Luis; Hinojosa, Luis Felipe

doi:10.1016/j.palaeo.2019.04.006

Cited by 3 publications

(17 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…compArison to other pAleogene-neogene pAleoFlorAs From south AmericA The physiognomy analysis for the Río Turbio and Río Guillermo formations allowed us to estimate paleoclimate conditions for the middle-upper Eocene-Oligocene-early Miocene in southern South America (Tables 1-4). The middle-late Eocene-Oligocene was characterized by warm and humid conditions and the Oligocene-early Miocene was a period of cool-temperate conditions (Zachos et al 2001b;Gutiérrez et al 2019).…”

Section: Discussionmentioning

confidence: 99%

“…It is widely recognized that leaf traits such as size and shape are important features to estimate temperature and precipitation (Wolfe 1978(Wolfe , 1979Wilf 1997;Huff et al 2003;Wilf et al 2003;Greenwood et al 2005;Royer et al 2005 among others) and leaves are potential proxies for reconstructing paleoenvironments and paleoclimates (Traiser et al 2018). Paleobotanists have used fossil plants as proxies for estimating past climate variables at different geological times (Hinojosa et al 2006a;Arens & Harris 2015;Caviglia 2018;Lowe et al 2018;Gutiérrez et al 2019). Estimates of the past climate conditions are derived from present-day calibration data set as close as possible to the climate response of the studied fossil leaves (Wolfe 1993;Jordan 1997;Gregory-Wodzicki 2000;Jacobs 2002;Greenwood et al 2004 among others).…”

Section: Introductionmentioning

confidence: 99%

“…The early-middle Eocene was characterized by warm and humid conditions with a high diversity of fossil plants (Wilf et al 2005). During the middle-late Eocene a mixed paleoflora evolved in Patagonia under warmer conditions (Romero 1978(Romero , 1986Hinojosa & Villagrán 1997) composed of paratropical and cold temperate fossil species (Romero 1986;Hinojosa & Villagrán 1997;Iglesias et al 2011;Vento et al 2017;Vento & Prámparo 2018;Gutiérrez et al 2019).…”

Section: Introductionmentioning

confidence: 99%

“…A global climate deterioration with temperate cool conditions in the early Oligocene is reflected by changes in floral composition (Wilf et al 2003;Bowen 2007;Gutiérrez et al 2019). The vegetation changed from paratropical to a colder temperate biome with temperate-cool representatives Vento et al 2017;Gutiérrez et al 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Despite an exhaustive study of paleontological plant collections in southern South America, studies that quantify climatic trends are limited (Gregory-Wodzicki 2000;Hinojosa et al 2006a) and most paleoclimate studies have been developed in southern Chile Hinojosa & Villagrán 2005;Gayó et al 2005;Hinojosa et al 2006a;Gutiérrez et al 2019). Paleoclimate reconstructions in Argentina using different techniques have increased in recent years and temperature and precipitation were estimated for Laguna del Paleoclimate for the Paleogene-Neogene in South America 2021 • 20 (3) Hunco (early Eocene) and Palacios de los Loros (Salamanca Formation, early Paleocene) localities in Argentina (Peppe et al 2011;Iglesias et al 2007).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Paleoclimate estimates for the Paleogene-Neogene in southern South America using fossil leaves as proxies

Vento¹,

Puebla²,

Pinzon³

et al. 2021

Comptes Rendus Palevol

View full text Add to dashboard Cite

It is widely recognized that fossil leaves are good proxies for paleoclimate estimates, and leaf physiognomy analysis is a traditional technique used to make climate estimates. There are only a few paleoclimate reconstructions for the southern part of South America based on this technique. Here we report climate parameters using fossil leaves from the Río Turbio (Eocene-Oligocene) and Río Guillermo (Oligocene-early Miocene?) formations in southern South America, Cuenca Austral, Argentina. We used univariate (leaf margin and leaf foliar area analysis) and multivariate methods (CLAMP, DiLP) on two datasets from South America, in the Southern Hemisphere. Lower and upper members of the Río Turbio Formation show a mixed paleoflora represented by paratropical as well as cool-temperate taxa such as Nothofagus, with a similar percentage of untoothed fossil leaves. Climate estimates indicate warm and humid conditions for both Río Turbio Formation members. The Río Guillermo Formation is represented by mostly cool-temperate elements, mainly Nothofagus, and most with toothed margins. The paleoclimate analysis indicates a decrease in temperature and precipitation when comparing the two studied formations. Today, temperate forests in southern Argentina have a plant composition and climate more similar to the estimates made for the Río Guillermo Formation.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Paleoclimate estimates for the Paleogene-Neogene in southern South America using fossil leaves as proxies

Vento¹,

Puebla²,

Pinzon³

et al. 2021

Comptes Rendus Palevol

View full text Add to dashboard Cite

show abstract

Early Miocene paleoclimate in southern Patagonia inferred from fossil woods

Ruiz

Pujana

Brea

2021

Review of Palaeobotany and Palynology

View full text Add to dashboard Cite

Climate and Vegetation of the Miocene of Tierra del Fuego: Filaret Formation

Sandoval,

Yabe,

Nishida

et al. 2024

Paleoceanog and Paleoclimatol

View full text Add to dashboard Cite

The changing climate during the Cenozoic affected the diversity of plants in Patagonia, as species richness tends to increase during warm periods and decrease during cold periods. Precipitation is a significant factor shaping diversity, as shown in the case of central Chile during the Miocene. This study presents a reconstruction of the climate and vegetation in Tierra del Fuego Island, located approximately 52°S, using fossil flora recovered from the Filaret Formation to understand the Miocene epoch, characterized by contrasting global climatic changes. Filaret flora comprises twenty‐seven morpho‐taxa, including nine Nothofagus species and other Gondwanan and Neotropical families, such as Atherospermataceae and Anacardiaceae, in agreement with a forest habitat. Leaf physiognomy climate reconstruction suggests microthermal conditions, with a mean annual temperature of 9.4–11°C and annual precipitation ranging from 985 to 1,130 mm. These conditions are warmer and wetter than the modern record of the area, with a MAT of 6°C and mean annual precipitation of 300 mm. As the Filaret fossil record suggests, the forest habitat under a microthermal climate is consistent with the global climatic reconstruction of the Early Miocene. This Miocene landscape on Tierra del Fuego was possible because the Andes could not rain‐shadow humid westerly winds by this timeframe.

show abstract

An Oligocene microthermal forest dominated by Nothofagus in Sierra Baguales, Chilean Patagonia: Response to global cooling and tectonic events

Cited by 3 publications

References 44 publications

Paleoclimate estimates for the Paleogene-Neogene in southern South America using fossil leaves as proxies

Paleoclimate estimates for the Paleogene-Neogene in southern South America using fossil leaves as proxies

Early Miocene paleoclimate in southern Patagonia inferred from fossil woods

Climate and Vegetation of the Miocene of Tierra del Fuego: Filaret Formation

Contact Info

Product

Resources

About