Evidence of glacial abrasion in the Calingasta–Uspallata and western Paganzo basins, mid-Carboniferous of western Argentina

The northwestern Argentina Tarija Basin: Stratigraphy, depositional systems, and controlling factors in a glaciated basin

“…These features show an ice movement to the NW, strongly consistent with the expected ice movement from the paleo-South Pole (see the paleoclimatic/paleogeographic reconstruction in Scotese et al, 1999). When the Tarija Basin glacial striae orientation data are integrated with similar data from the Paraná (Gesicki et al, 2002;Trosdtorf et al, 2003Trosdtorf et al, , 2005, Paganzo, and Calingasta-Uspallata (Ló pez Gamundi and Martínez, 2000) basins, a radiating pattern results, fitting perfectly with continental ice cap growth (Fig. 7).…”

“…di Pasquo (2003) establishes a biostratigraphic correlation scheme and proposes a Late Namurian age for the beginning of sedimentation and probably an Early Permian age for its culmination. A Late Namurian-Wesphalian age is recorded in the main diamictic levels (Tarija Formation), coincident with deposits of the Paganzo, Río Blanco, and Calingasta-Uspallata glacigenic basins of Argentina (Ló pez Gamundi and Martínez, 2000;Limarino et al, 2002). Stephanian assemblages have been described in the lacustrine facies of the Yaguacua Member of the San Telmo Formation (di Pasquo and di Pasquo et al, 2001).…”

Tectonic, sea-level, and climatic controls on Late Paleozoic sedimentation in the western basins of Argentina

“…They are not laterally continuous but rather form lenticular bodies of diamictites that abruptly disappear, removed in part through postglacial erosion. Although glacial conditions have been suggested by several authors (Limarino and Gutiérrez, 1990;Milana and Bercowski, 1993;Ló pez Gamundí and Martínez, 2000), true subglacial tillites have rarely been described. Glacial conditions have been inferred from indirect evidence, such as striated pavements, resedimented diamictites, varve-like deposits, and shales containing dropstones.…”

“…Permian (Limarino and Césari, 1985;Archangelsky et al, 1996). The stratigraphic record of this basin shows three important features: (1) an important glacial event containing both subglacial continental and resedimented marine deposits (Limarino and Gutiérrez, 1990;Milana and Bercowski, 1993;Ló pez Gamundí and Martínez, 2000;Marenssi et al, 2005), (2) well-documented occurrence of plant fossils belonging to the NBG (Nothorhacopteris-Botryphyllum-Ginkgophyllum) flora zone (a classical Gondwana flora; Archangelsky et al, 1996), and (3) widespread development of red-bed sequences during the Permian.…”

A review on late Paleozoic ice-related erosional landforms in the Paraná Basin: origin and paleogeographical implications

“…Striated clast pavements have been reported in other late Paleozoic glacial units, such as in the Dwyka Formation of southern Africa (Visser & Hall 1985) and the Hoyada Verde Formation in Argentina (e.g. López-Gamundí & Martínez 2000), both associated with diamictite units. The Hoyada Verde section was reexamined recently by López-Gamundí et al (2016) who reported two stratigraphically distinct striated boulder pavements.…”