Affordable Access

Associations of Freshwater Mollusks and Extinct Fauna in Kamac Mayu Site during the Late Pleistocene in the Arid North of Chile

Authors
Publication Date
Keywords
  • Animales E Insectos
  • Paleoambiente
  • Costa Norte Semiárido
  • Pleistoceno
  • Zooarqueología
Disciplines
  • Ecology
  • Geography

Abstract

paleo.pmd Associations of Freshwater Mollusks and Extinct Fauna in Kamac Mayu Site during the Late Pleistocene in the Arid North of Chile Donald Jackson S. and Patricio López M. Reports on extinct faunal remains from the arid north of Chile are scarce (Bonn and García 2002; Casamiquela 1969–1970, 1999; López et al. 2005; Salinas et al. 1991), as is information about the conditions and environments of deposition. Nevertheless, recent extinct fauna findings in the sites of Kamac Mayu and Betecsa 1 in the arid north of Chile (Alberdi et al. 2007; López et al. 2007) have generated a more complete environmental scene owing to the presence of fauna not previously described for the area, macrobotanical remains, and the identification of associated freshwater mollusks. Kamac Mayu site is located in the city of Calama (68° 542′ 403″ W, 22° 262′ 203″ S), in the arid north of Chile. Stratigraphic excavations 1.80 m deep in a 32-m2 area allowed the identification of sedimentation in four stages of deposition (Chong and Jensen 2004): 1) a lacustrine stage; 2) stage of karstic erosion; 3) fluvial stage; 4) stage of calcareous cementation. The first stage consists of pulverized marl and diatomites from the Chiu-Chiu Formation dated to the Plio-Pleistocene. During the second stage an erosional surface was formed by dissolution cavities, followed by a fluvial system of clastic sediment. The third stage (fluvial) consists of sandy gravel and sand deposits that filled a series of channels of the karstic formation; the deposition process predates the present Loa River and the period in which the extinct faunal remains would have been deposited (López and Labarca 2005). The fossil fauna includes remains of at least one juvenile and one adult Hippidion saldiasi, five Macrauchenia sp. adults, a juvenile Edentata of undeter- mined genus and species, and camelid remains without assignment to genus, but with affinities with Lama gracilis (López et al. 2007). This faunal assem- blage is the result of the natura

There are no comments yet on this publication. Be the first to share your thoughts.