Lotena Formation

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Lotena Formation
Stratigraphic range: Late Callovian-Early Oxfordian
~165–160 Ma
↓
TypeGeological formation
Unit of
Sub-unitsLa Estrechura, El Pichanal & El Vado Members
Underlies
Overlies
 
Thickness50–167 m (164–548 ft)
Lithology
PrimarySandstone, conglomerate
OtherLimestone, shale
Location
Coordinates38°36′S 70°12′W / 38.6°S 70.2°W / -38.6; -70.2Coordinates: 38°36′S 70°12′W / 38.6°S 70.2°W / -38.6; -70.2
Approximate paleocoordinates35°54′S 31°42′W / 35.9°S 31.7°W / -35.9; -31.7
RegionNeuquén Basin
 Mendoza & Neuquén Provinces
  Northern Patagonia
Country Argentina
Extent2,500 km2 (970 sq mi)
Type section
Named forCerro Lotena
Named byWeaver
Year defined1931
Lotena Formation is located in Argentina
Lotena Formation
Lotena Formation (Argentina)

The Lotena Formation is a geologic formation dated from the Late Callovian to Early Oxfordian in the Neuquén Basin in Mendoza Province, Argentina.[1] The formation, first defined by Weaver in 1931 and named after Cerro Lotena,[2] consists of fluvial conglomerates, calcareous sandstones and marine limestones and shales.[2][3] The Lotena Formation is overlain by the and overlies the of the .[4] Initially, the fossil find of the pterosaur Herbstosaurus pigmaeus was reported from the formation,[5] but this fossil was found in the younger Vaca Muerta.[6] The formation is a reservoir rock in the Neuquén Basin.

See also[]

References[]

  1. ^ Lotena Formation at Fossilworks.org
  2. ^ a b Zanettini et al., 2010, p.25
  3. ^ Veiga et al., 2011, p.174
  4. ^ Veiga et al., 2011, p.178
  5. ^ Wellnhofer, 1991, p.81
  6. ^ Herbstosaurus at Fossilworks.org

Bibliography[]

  • Veiga, Gonzalo D.; Ernesto Schwarz, and Luis A. Spalletti. 2011. Análisis estratigráfico de la Formación Lotena (Calloviano superior-Oxfordiano inferior) en la Cuenca Neuquina Central, República Argentina - Integración de información de afloramientos y subsuelo. Andean Geology 38. 171–197. Accessed 2017-08-03.
  • Wellnhofer, Peter. 1991. Summary of Middle Jurassic Pterosaurs in The Illustrated Encyclopedia of Pterosaurs, 1–192. Salamander Books Limited, London, UK ISBN 0-86101-566-5.
  • Zanettini, Juan Carlos M.; Héctor A. Leanza, and Adolfo Giusiano. 2010. Programa Nacional de Cartas Geológicas de la República Argentina 1:250,000 - Hoja Geológica 3972-II Loncopué, 1–93. SEGEMAR. Accessed 2017-08-03.
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