earth science

Lago Colhué Huapí Formation

Lago Colhué Huapí Formation is a earth science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Lago Colhué Huapí Formation rather than just read about it. In short: The Lago Colhué Huapí Formation is a Late Cretaceous geologic formation of the Chubut Group in the Golfo San Jorge Basin in Patagonia, Argentina. The formation, named after Lake Colhué Huapí, is overlain by the Salamanca Formation of the Río Chico Group and in some areas by the Laguna Palacios Formation.

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Reference excerpt

The Lago Colhué Huapí Formation is a Late Cretaceous geologic formation of the Chubut Group in the Golfo San Jorge Basin in Patagonia, Argentina. The formation, named after Lake Colhué Huapí, is overlain by the Salamanca Formation of the Río Chico Group and in some areas by the Laguna Palacios Formation. The strata of the Lago Colhué Huapé Formation were thought to pertain to the Bajo Barreal Formation, but are now recognized as a distinct stratigraphic unit in their own right. The upper part of the Lago Colhué Huapí Formation has been dated to the upper Maastrichtian age of the late Cretaceous period. A basalt flow in the formation has been dated to 67.31 ± 0.55 million years ago, reinforcing the Late Maastrichtian age.

Vertebrate paleofauna Taxa recovered from the Lago Colhué Huapí Formation include the sauropods Aeolosaurus, and Argyrosaurus, as well as the hadrosaurid Secernosaurus and the probable elasmarian ornithopod Sektensaurus. The dubious ornithischian Notoceratops was also present.

Dinosaurs

Ornithischians

Sauropods

Theropods

Other reptiles

Fish

Plants

See also List of dinosaur-bearing rock formations List of stratigraphic units with few dinosaur genera

References

Bibliography Casal, Gabriel A.; Allard, José O.; Foix, Nicolás (March 2015). "Análisis estratigráfico y paleontológico del cretácico superior en la cuenca del golfo San Jorge: nueva unidad litoestratigráfica para el grupo Chubut" [Stratigraphic and paleontological analysis of the Upper Cretaceous in the San Jorge Gulf Basin: a new lithostratigraphic unit for the Chubut Group]. Revista de la Asociación Geológica Argentina (in Spanish). 72 (1): 77–95. hdl:11336/111016. Casal, Gabriel (30 April 2007). "Aeolosaurus colhuehuapensis sp. nov. (Sauropoda, Titanosauria) de la Formación Bajo Barreal, Cretácico superior de Argentina" [Aeolosaurus colhuehuapensis sp. nov.(Sauropoda, Titanosauria) from the Lower Barreal Formation, upper Cretaceous of Argentina]. Revista Brasileira de Paleontologia (in Spanish). 10 (1): 53–62. Bibcode:2007RvBrP..10...53C. doi:10.4072/rbp.2007.1.05. Clyde, W.C.; Wilf, P.; Slingerland, Iglesias A.; Barnum, T.; Bijl, P.K. (2014), "New age constraints for the Salamanca Formation and lower Río Chico Group in the western San Jorge Basin, Patagonia, Argentina: implications for Cretaceous—Paleogene extinction recovery and land mammal age correlations", Geological Society of America Bulletin, 126 (3–4): 289–306, Bibcode:2014GSAB..126..289C, doi:10.1130/B30915.1, hdl:11336/80135 Cortés, José María (1986). Estratigrafía y tectónica de la región central de la Provincia de Chubut, República Argentina [Stratigraphy and tectonics of the central region of Chubut Province, Argentina] (Thesis) (in Spanish). Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. hdl:20.500.12110/tesis_n1975_Cortes. Ibiricu, Lucio M.; Casal, Gabriel A.; Alvarez, Bruno N.; De Sosa Tomas, Andrea; Lamanna, Matthew C.; Cruzado-Caballero, Penelope (October 2021). "New hadrosaurid (Dinosauria: Ornithopoda) fossils from the uppermost Cretaceous of central Patagonia and the influence of paleoenvironment on South American hadrosaur distribution". Journal of South American Earth Sciences. 110 103369. Bibcode:2021JSAES.11003369I. doi:10.1016/j.jsames.2021.103369. hdl:11336/139005. Mannion, P.D.; Otero, A. (2012), "A reappraisal of the Late Cretaceous Argentinean sauropod dinosaur Argyrosaurus superbus, with a description of a new titanosaur genus", Journal of Vertebrate Paleontology, 32 (3): 614–638, Bibcode:2012JVPal..32..614M, doi:10.1080/02724634.2012.660898, hdl:11336/197194 Martínez, R.D.F.; Lamanna, M.C.; Novas, F.E.; Ridgely, R.C.; Casal, G.A.; Martínez, J.E. (2016), "A Basal Lithostrotian Titanosaur (Dinosauria: Sauropoda) with a Complete Skull: Implications for the Evolution and Paleobiology of Titanosauria", PLoS ONE, 11 (4) e0151661, Bibcode:2016PLoSO..1151661M, doi:10.1371/journal.pone.0151661, PMC 4846048, PMID 27115989 Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria (2nd ed.), Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2, retrieved 2019-02-21{{citation}}: CS1 maint: publisher location (link) Vallati, Patricia; De Sosa Tomas, Andrea; Casal, Gabriel (January 2020). "A Maastrichtian terrestrial palaeoenvironment close to the K/Pg boundary in the Golfo San Jorge basin, Patagonia, Argentina". Journal of South American Earth Sciences. 97 102401. Bibcode:2020JSAES..9702401V. doi:10.1016/j.jsames.2019.102401.

Illustrations

Worked examples

Example 1 — a first encounter with Lago Colhué Huapí Formation

Start with the simplest possible case. Write down what Lago Colhué Huapí Formation claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Lago Colhué Huapí Formation before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Lago Colhué Huapí Formation ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Lago Colhué Huapí Formation

In research: Lago Colhué Huapí Formation appears in earth science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Lago Colhué Huapí Formation in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Lago Colhué Huapí Formation is common in secondary-school and first-year university syllabi. It links to neighbouring topics Campanian Stage, Cretaceous Argentina, Fluvial deposits, so understanding it makes those chapters shorter.
In everyday life: Look for Lago Colhué Huapí Formation outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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Frequently asked questions

What is Lago Colhué Huapí Formation in simple terms?

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Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

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It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Lago Colhué Huapí Formation.