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Lohan Cura Formation

April 11, 2024

The Lohan Cura Formation is a geologic formation with outcrops in the Argentine provinces of Río Negro, Neuquén, and Mendoza. It is the second oldest Cretaceous terrestrial formation in the Neuquén Basin.

Lohan Cura Formation
Stratigraphic range: Late Aptian-Albian
~117–100 Ma
TypeGeological formation
Sub-unitsPuesto Quiroga & Cullín Grande Members
UnderliesRío Limay Subgroup
 Candeleros Formation
OverliesMendoza Group
 La Amarga, Agrio & Bajada Colorada Formations
Thickness177 m (581 ft)
Lithology
PrimaryMudstone, siltstone, sandstone
OtherClaystone
Location
Coordinates39°36′S 69°24′W / 39.6°S 69.4°W / -39.6; -69.4
Approximate paleocoordinates43°42′S 39°24′W / 43.7°S 39.4°W / -43.7; -39.4
RegionRío Negro Province,
Mendoza Province,
Neuquén Province
CountryArgentina
ExtentNeuquén Basin
Type section
Named byLeanza & Hugo
Year defined1995
Lohan Cura Formation (Argentina)

The Lohan Cura Formation unconformably overlies the terrestrial La Amarga Formation. In some places it also overlies the older marine Agrio and Bajada Colorada Formations of the Mendoza Group through the same Middle Miranican unconformity. It is in turn overlain by the Candeleros Formation of the Neuquén Group, separated by the Main Miranican unconformity. The Lohan Cura correlates with the Rayoso Formation in some areas.[1]

Subdivision edit

The Lohan Cura Formation contains two members of roughly equal thickness. The lowermost member, Puesto Quiroga Member is approximately 85 metres (279 ft) thick. The lowest sediments in this unit are conglomerates, overlain by sandstones and siltstones. The upper two-thirds of the member consists mainly of shales. The Cullín Grande Member is the upper member within the formation, about 92 metres (302 ft) thick, which contains numerous sandstones displaying evidence of stream channels. Near the top of the sequence, siltstones and claystones become dominant.

Fossil content edit

Numerous tetrapod fossils have been recovered from the Cullín Grande Member of the Lohan Cura, including:

The rebbachisaurid Rayososaurus comes from the correlating Rayoso Formation in this same area.

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.
Dinosaurs of the Lohan Cura Formation
Genus Species Presence Notes Images
Agustinia[2] A. ligabuei[2] Neuquén Province[2] Dorsal sacral and caudal neural arches, hindlimb elements, and pelvic fragments (the latter misidentified as osteoderms)[3]
 
Comahuesaurus C. windhauseni Neuquén Province "At least three individuals"
Ligabuesaurus[2] L. leanzai[2] Neuquén Province[2] Partial skull and post cranial remains[2]
Limaysaurus[2] L. tessonei[2] Neuquén Province[2] MUCPv-205, a partial skeleton including the back of the skull, together with MUCPv-206, a second fragmentary skeleton including five caudal vertebrae and an ischium[2]  
Rebbachisauridae indet.[2] unknown[2] Neuquén Province[2]

See also edit

References edit

  1. ^ Leanza et al., 2004, p.66
  2. ^ a b c d e f g h i j k l m n Weishampel, David B; et al. (2004). "Dinosaur distribution (Early Cretaceous, South America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd ed., Berkeley: University of California Press. pp. 563–570. ISBN 0-520-24209-2.
  3. ^ "Table 13.1," in Weishampel, et al. (2004). Page 267.

Bibliography edit

  • Leanza, H.A.; Apesteguia, S.; Novas, F.E.; De la Fuente, M.S. (2004). "Cretaceous terrestrial beds from the Neuquén Basin (Argentina) and their tetrapod assemblages". Cretaceous Research. 25: 61–87. Retrieved 2019-02-16.

Further reading edit

 
Wikimedia Commons has media related to Lohan Cura Formation.
  • J. F. Bonaparte, B. J. González Riga, and S. Apesteguía. 2006. "Ligabuesaurus leanzai gen. et sp. nov. (Dinosauria, Sauropoda), a new titanosaur from the Lohan Cura Formation (Aptian, Lower Cretaceous) of Neuquén, Patagonia, Argentina". Cretaceous Research 27:364–376
  • J. F. Bonaparte. 1999. "An armoured sauropod from the Aptian of northern Patagonia, Argentina". Y. Tomida, T. H. Rich, and P. Vickers-Rich (eds.), Proceedings of the Second Gondwanan Dinosaur Symposium, National Science Museum Monographs 15:1–12
  • A. G. Martinelli, A. C. Garrido, A. M. Forasiepi, E. R. Paz, and Y. Gurovich. 2007. "Notes on fossil remains from the Early Cretaceous Lohan Cura Formation, Neuquén Province, Argentina". Gondwana Research 11:537–552
  • L. Salgado, A. Garrido, S. E. Cocca and J. R. Cocca. 2004. "Lower Cretaceous rebbachisaurid sauropods from Cerro Aguada del León (Lohan Cura Formation), Neuquén province, northwestern Patagonia, Argentina". Journal of Vertebrate Paleontology 24(4):903–912

April 11, 2024
lohan, cura, formation, geologic, formation, with, outcrops, argentine, provinces, río, negro, neuquén, mendoza, second, oldest, cretaceous, terrestrial, formation, neuquén, basin, stratigraphic, range, late, aptian, albian, preꞒ, ntypegeological, formationsub. The Lohan Cura Formation is a geologic formation with outcrops in the Argentine provinces of Rio Negro Neuquen and Mendoza It is the second oldest Cretaceous terrestrial formation in the Neuquen Basin Lohan Cura FormationStratigraphic range Late Aptian Albian 117 100 Ma PreꞒ Ꞓ O S D C P T J K Pg NTypeGeological formationSub unitsPuesto Quiroga amp Cullin Grande MembersUnderliesRio Limay Subgroup Candeleros FormationOverliesMendoza Group La Amarga Agrio amp Bajada Colorada FormationsThickness177 m 581 ft LithologyPrimaryMudstone siltstone sandstoneOtherClaystoneLocationCoordinates39 36 S 69 24 W 39 6 S 69 4 W 39 6 69 4Approximate paleocoordinates43 42 S 39 24 W 43 7 S 39 4 W 43 7 39 4RegionRio Negro Province Mendoza Province Neuquen ProvinceCountryArgentinaExtentNeuquen BasinType sectionNamed byLeanza amp HugoYear defined1995Lohan Cura Formation Argentina The Lohan Cura Formation unconformably overlies the terrestrial La Amarga Formation In some places it also overlies the older marine Agrio and Bajada Colorada Formations of the Mendoza Group through the same Middle Miranican unconformity It is in turn overlain by the Candeleros Formation of the Neuquen Group separated by the Main Miranican unconformity The Lohan Cura correlates with the Rayoso Formation in some areas 1 Contents 1 Subdivision 2 Fossil content 3 See also 4 References 4 1 Bibliography 5 Further readingSubdivision editThe Lohan Cura Formation contains two members of roughly equal thickness The lowermost member Puesto Quiroga Member is approximately 85 metres 279 ft thick The lowest sediments in this unit are conglomerates overlain by sandstones and siltstones The upper two thirds of the member consists mainly of shales The Cullin Grande Member is the upper member within the formation about 92 metres 302 ft thick which contains numerous sandstones displaying evidence of stream channels Near the top of the sequence siltstones and claystones become dominant Fossil content editNumerous tetrapod fossils have been recovered from the Cullin Grande Member of the Lohan Cura including several turtles including 2 species of Prochelidella rebbachisaurid sauropods including Agustinia and Comahuesaurus LigabuesaurusThe rebbachisaurid Rayososaurus comes from the correlating Rayoso Formation in this same area Color keyTaxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon Notes Uncertain or tentative taxa are in small text crossed out taxa are discredited Dinosaurs of the Lohan Cura FormationGenus Species Presence Notes ImagesAgustinia 2 A ligabuei 2 Neuquen Province 2 Dorsal sacral and caudal neural arches hindlimb elements and pelvic fragments the latter misidentified as osteoderms 3 nbsp Comahuesaurus C windhauseni Neuquen Province At least three individuals Ligabuesaurus 2 L leanzai 2 Neuquen Province 2 Partial skull and post cranial remains 2 Limaysaurus 2 L tessonei 2 Neuquen Province 2 MUCPv 205 a partial skeleton including the back of the skull together with MUCPv 206 a second fragmentary skeleton including five caudal vertebrae and an ischium 2 nbsp Rebbachisauridae indet 2 unknown 2 Neuquen Province 2 See also editList of dinosaur bearing rock formations Romualdo FormationReferences edit Leanza et al 2004 p 66 a b c d e f g h i j k l m n Weishampel David B et al 2004 Dinosaur distribution Early Cretaceous South America In Weishampel David B Dodson Peter and Osmolska Halszka eds The Dinosauria 2nd ed Berkeley University of California Press pp 563 570 ISBN 0 520 24209 2 Table 13 1 in Weishampel et al 2004 Page 267 Bibliography edit Leanza H A Apesteguia S Novas F E De la Fuente M S 2004 Cretaceous terrestrial beds from the Neuquen Basin Argentina and their tetrapod assemblages Cretaceous Research 25 61 87 Retrieved 2019 02 16 Further reading edit nbsp Wikimedia Commons has media related to Lohan Cura Formation J F Bonaparte B J Gonzalez Riga and S Apesteguia 2006 Ligabuesaurus leanzai gen et sp nov Dinosauria Sauropoda a new titanosaur from the Lohan Cura Formation Aptian Lower Cretaceous of Neuquen Patagonia Argentina Cretaceous Research 27 364 376 J F Bonaparte 1999 An armoured sauropod from the Aptian of northern Patagonia Argentina Y Tomida T H Rich and P Vickers Rich eds Proceedings of the Second Gondwanan Dinosaur Symposium National Science Museum Monographs 15 1 12 A G Martinelli A C Garrido A M Forasiepi E R Paz and Y Gurovich 2007 Notes on fossil remains from the Early Cretaceous Lohan Cura Formation Neuquen Province Argentina Gondwana Research 11 537 552 L Salgado A Garrido S E Cocca and J R Cocca 2004 Lower Cretaceous rebbachisaurid sauropods from Cerro Aguada del Leon Lohan Cura Formation Neuquen province northwestern Patagonia Argentina Journal of Vertebrate Paleontology 24 4 903 912 Retrieved from https en wikipedia org w index php title Lohan Cura Formation amp oldid 1165826710, wikipedia, wiki, book, books, library,

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