Paleolandscape reconstruction and interplay of controlling factors of an Eocene pedogenically-modified distal volcaniclastic succession in Patagonia

Stratigraphic architecture and paleosols as basin correlation tools of the early Paleogene infill in central–south Patagonia, Golfo San Jorge Basin, Argentinean Patagonia

“…Optimum (51-53 Ma;Zachos et al, 2008). Similarly, stratigraphic correlation of strongly and very-strongly developed paleosols of the Koluel-Kaike Formation deposition (e.g., Marriott and Wright, 1993;Amorosi et al, 2017;Raigemborn et al, 2018a). the paleosols observed within the early Cenozoic deposits of the eastern GSJB (see Fig.…”

“…Krause et al (2017) (Krause et al, 2010(Krause et al, , 2017Raigemborn et al, 2018a, b), and semi-arid to arid and temperate climatic conditions for the SB5 (Bellosi and González, 2010). The Río Chico Group was deposited in coincidence with the Early Paleogene Greenhouse World (e.g., Raigemborn et al, 2009Raigemborn et al, , 2018a, during which two hyperthermal events and several thermal events took place (Zachos et al, 2001(Zachos et al, , 2008. The change from Ultisollike paleosols with plinthitic horizon and equivalents paleosols (SB3 and SB4) to Krause et al (2017) and Raigemborn et al (2018b) suggested a link between these mature paleosols with the early Eocene Climate…”

“…In the westernmost North Flank and the surroundings of the San Bernardo Fold Belt, the Salamanca Formation was deposited during the early Danian; instead, farther east, it has been assigned to be middle-late Danian (Clyde et al, 2014). The Salamanca Formation was covered during the middle Danian by the continental deposits of the Río Chico Group, that persisted active up to the middle Eocene (following Clyde et al, 2014;Krause et al, 2017;Raigemborn et al, 2018a) (Fig. 2).…”

“…South Flank (Río Deseado area-Cañadón Lobo) presents a vertical trend from very weakly developed paleosols to very strongly developed ones, and that upwards the trend is reversed (Table 2; see a discussion about this trend in Krause et al, 2010 andRaigemborn et al, 2018a).…”

“…2). The area hosts abundant sedimentological and paleopedological data (Feruglio, 1949;Andreis et al, 1975;Legarreta et al, 1990;Martínez, 1992;Legarreta and Uliana, 1994;Matheos et al, 2001;Iglesias, 2007;Raigemborn, 2008;Raigemborn et al, 2009aRaigemborn et al, , b, 2010Raigemborn et al, , 2014Raigemborn et al, , 2018aKrause et al, 2010aKrause et al, , b, 2017Krause and Piña, 2012;Foix et al, 2013Foix et al, , 2015Clyde et al, 2014;Woodburne et al, 2014;Comer et al, 2015;Ruiz et al, 2017Ruiz et al, , 2020Lizzoli et al, 2018;Zucol et al, 2018), at which recently was added a temporal resolution (Clyde et al, 2014;Krause et al, 2017). The Salamanca Formation and the lowermost Río Chico Group have been recently correlated with globally recognized sea-level events, highlighting the role of fluctuating sea level as a primary control (e.g., Clyde et al, 2014;Comer et al, 2015).…”