Stratigraphic range: Ypresian (Itaboraian) ~52.44–52 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
↓
Type
Geological formation
Unit of
Middle Chubut River Volcanic Pyroclastic Complex
Underlies
Sarmiento Group
Overlies
Barda Colorada Ignimbrite
Thickness
170 m (560 ft)
Lithology
Primary
Tuff, mudstone, sandstone
Location
Coordinates
42°18′S70°00′W / 42.3°S 70.0°W / -42.3; -70.0
Approximate paleocoordinates
44°48′N60°00′W / 44.8°N 60.0°W / 44.8; -60.0
Region
Chubut Province
Country
Argentina
Extent
Cañadón Asfalto Basin
Type section
Named for
Laguna del Hunco
Named by
Aragón & Mazzoni
Location
Languiñeo Department
Year defined
1997
Coordinates
42°18′S70°00′W / 42.3°S 70.0°W / -42.3; -70.0
Approximate paleocoordinates
44°48′N60°00′W / 44.8°N 60.0°W / 44.8; -60.0
Region
Chubut Province
Country
Argentina
Thickness at type section
170 m (560 ft)
Laguna del Hunco Formation (Argentina)
The Laguna del Hunco Formation or Laguna del Hunco Tuff (Spanish: Formación Laguna del Hunco, Tufolitas Laguna del Hunco) is a localized Early Eocene (Itaboraian in the SALMA classification) fossiliferous geological formation of the Cañadón Asfalto Basin in central Patagonia, Argentina. The 170 metres (560 ft) thick formation comprises tuffaceous mudstones and sandstones deposited in a crater lake environment and crops out at Laguna del Hunco in the northwestern Chubut Province.
The formation has been precisely dated to 52.22 ± 0.22 Ma on the basis of sanidine crystals in the tuffs of the formation. The Laguna del Hunco formation overlies the Barda Colorada Ignimbrite and is covered by the Sarmiento Group. The unit is renowned for the preservation of an extraordinarily rich fossil flora assemblage of mixed South American families and presently uniquely Australasian flora, among which the oldest Eucalyptus fossils found worldwide. The formation also has provided many fossil insects, including insect eggs, fossil fish of Bachmannia chubutensis and the frog Shelania pascuali. Periodic bursts of gas in the volcanic crater lake are thought to have produced the sudden death and preservation of the floral and faunal assemblage.
and 27 Related for: Laguna del Hunco Formation information
The LagunadelHuncoFormation or LagunadelHunco Tuff (Spanish: Formación LagunadelHunco, Tufolitas LagunadelHunco) is a localized Early Eocene (Itaboraian...
fossils are from the early Eocene (51.9 Mya), and were found in the LagunadelHuncoFormation in Chubut Province in Argentina. This shows that the genus had...
United States Wasatch Formation of the western United States Itaboraian formations Itaboraí Formation of Brazil LagunadelHuncoFormation of Argentina Steurbaut...
material of Pteridium sp. cf. P. esculentum from the Miocene Ñirihuau Formation (Argentina) representing the oldest and southernmost record of Pteridium...
States Itaboraian formations Itaboraí Formation of Brazil LagunadelHuncoFormation of Argentina Steurbaut, 2006, p.76 Gentbrugge Formation Steurbaut, Etienne;...
States Itaboraian formations Itaboraí Formation of Brazil LagunadelHuncoFormation of Argentina Steurbaut, 2006, p.76 Tielt Formation - National Commission...
Cerro Verde at Fossilworks.org Casamayor Bed 3 at Fossilworks.org LagunadelHunco at Fossilworks.org Alemania at Fossilworks.org Casa Grande at Fossilworks...
indet. The formation has also provided many pollen, analyzed in 2003 by Melendi et al. South American land mammal ages LagunadelHuncoFormation, contemporaneous...
(2020). "Late early Miocene caviomorph rodents from Lagunadel Laja (~37° S), Cura-Mallín Formation, south-central Chile". Journal of South American Earth...
the Wind River and Wilcox Formations of the United States and the LagunadelHuncoFormation of Argentina. The Wasatch Formation is a tight gas reservoir...
Fossil Beds National Monument Santa Rosa local fauna Messel pit LagunadelHuncoFormation Posidonia Shale Archer M; Hand, Suzanne J. & Godthelp H. [1991]...
States Itaboraian formations Itaboraí Formation of Brazil Laguna del HuncoFormation of Argentina Lignites de Soissonais at Fossilworks.org Broin, 1977...
the Cambrian Stage 4 Forteau Formation (Canada) as fossil material of planktic green algae with coenobial colony formation. Yang et al. (2023) reinterpret...
Formation of the eastern United States Wasatch Formation of the western United States Itaboraian formations Itaboraí Formation of Brazil Lagunadel Hunco...
fossil genus is also known: †Austropanorpodes Petrulevicius 2009 LagunadelHuncoFormation, Argentina, Eocene (Ypresian) "Panorpodidae". World Checklist...
of Shelania have been found in the Mustersan Vaca Mahuida and LagunadelHuncoFormations of Argentina. List of prehistoric amphibians "†Shelania Casamiquela...
Formation of the western United States Itaboraian formations Itaboraí Formation of Brazil LagunadelHuncoFormation of Argentina Steurbaut, 2006, p.74 Molina...
(Cunoniaceae) fruits of Australasian affinity from the early Eocene LagunadelHunco flora, Patagonia, Argentina". Annals of Botany. 119 (4): 507–516. doi:10...
traits. A putative bamboo "Chusquea" oxyphylla from the early Eocene LagunadelHunco biota (Argentina) is reinterpreted as a conifer by Wilf (2020), who...
Conifer wood assemblage dominated by Podocarpaceae, early Eocene of LagunadelHunco, central Argentinean Patagonia. PhytoKeys, 156, 81–102. https://doi...
Smith; B.S. Singer, and M.A. Gandolfo. 2005. Eocene Plant Diversity at LagunadelHunco and Río Pichileufú, Patagonia, Argentina. The American Naturalist 165...
Global Information
