earth science

Laguna Palacios Formation

Laguna Palacios 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 Laguna Palacios Formation rather than just read about it. In short: The Laguna Palacios Formation is a Maastrichtian geologic formation of the Chubut Group in the Golfo San Jorge Basin in Patagonia, Argentina. The formation partly overlies and partly is laterally equivalent to the Lago Colhué Huapí Formation and is overlain by the Salamanca Formation of the Río Chico Group.

Key takeaways

Laguna Palacios Formation belongs to earth science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Laguna Palacios Formation to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Laguna Palacios Formation from memory before moving on to harder problems.

Reference excerpt

The Laguna Palacios Formation is a Maastrichtian geologic formation of the Chubut Group in the Golfo San Jorge Basin in Patagonia, Argentina. The formation partly overlies and partly is laterally equivalent to the Lago Colhué Huapí Formation and is overlain by the Salamanca Formation of the Río Chico Group. The formation comprises tuff reworked by fluvial activity and paleosols. The Laguna Palacios Formation has provided fossilized bee nests.

Environment Primary deposits of the Lagunas Palacios Formation consist of massive sheet beds of vitric and crystal tuffs and chonites, tuffaceous mudstones and claystones with moderate bioturbation and pedified tops. Subordinate fine to medium grained sandstones are in incised lenticular or channel beds with erosive bases. Scarce fine conglomerates appear as channel fills. Modified facies are paleosols originating in aeolian ash and sand substrate. These record root traces, waterlogging, desiccation cracks, and in situ fossil tree stumps. The sedimentary scenario was similar to the loess plains with few rivers and ponds. Pyroclastics supplied as distal ash fallout were pedified by subordinated fluvial streams. This environment was comparable to the Pleistocene-Holocene loess Pampean Plain. Paleosols ranged from entisols to andosols and alfisosols/mollisols, representing a temperate subhumid-seasonal climate in a grass-covered landscape. Halictin bee nests and Coelopteran pupal chambers have been found in this formation, with the nests being some of the earliest evidence for eusociality in bees.

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 (2015), "Análisis estratigráfico y paleontológico del Cretácico Superior en la Cuenca del Golfo San Jorge: Nueva unidad litoestratigráfica para el Grupo Chubut", Revista de la Asociación Geológica Argentina, 72: 77–95, hdl:11336/111016, retrieved 2019-02-16 Genise, J.F.; Sciutto, J.C.; Laza, J.H.; González, M.A. (2002), "Fossil bee nests, coleopteran pupal chambers and tuffaceous paleosols from the Late Cretaceous Laguna Palacios Formation, Central Patagonia (Argentina)", Palaeogeography, Palaeoclimatology, Palaeoecology, 177 (3–4): 215–235, Bibcode:2002PPP...177..215G, doi:10.1016/S0031-0182(01)00333-9, retrieved 2019-02-16 Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2, retrieved 2019-02-21

Illustrations

Worked examples

Example 1 — a first encounter with Laguna Palacios Formation

Start with the simplest possible case. Write down what Laguna Palacios 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 Laguna Palacios 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 Laguna Palacios 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 Laguna Palacios Formation

In research: Laguna Palacios 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 Laguna Palacios 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: Laguna Palacios Formation is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cretaceous Argentina, Fluvial deposits, Fossiliferous stratigraphic units of South America, so understanding it makes those chapters shorter.
In everyday life: Look for Laguna Palacios 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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How to study Laguna Palacios Formation in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Laguna Palacios Formation means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Laguna Palacios Formation out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Laguna Palacios Formation in simple terms?

Why does Laguna Palacios Formation matter?

Because it connects several earth science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Laguna Palacios Formation?

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.

What does this page cover?

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