earth science

Huayquerías Formation

Huayquerías 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 Huayquerías Formation rather than just read about it. In short: The Huayquerías Formation (Spanish: Formación Huayquerías) is a Late Miocene fossiliferous geological formation of the Frontal Cordillera and Cuyo Basin of Argentina. The formation crops out in the central Mendoza Province.

Key takeaways

Huayquerías 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 Huayquerías Formation to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Huayquerías Formation from memory before moving on to harder problems.

Reference excerpt

The Huayquerías Formation (Spanish: Formación Huayquerías) is a Late Miocene fossiliferous geological formation of the Frontal Cordillera and Cuyo Basin of Argentina. The formation crops out in the central Mendoza Province. The formation, with a maximum thickness of 126 metres (413 ft), comprises reddish mudstones with thin beds of tuffs and sandstones, deposited in a fluvial, environment. The tuff in the formation is dated to 5.84 ± 0.41 Ma, placing it in the Huayquerian SALMA, the age named after the formation by Kraglievitch in 1934. The formation has provided fossils of the procyonid Cyonasua pascuali and the litoptern Huayqueriana cristata, named after the formation.

Description The Huayqueriás Formation, present in the Frontal Cordillera and the neighboring Cuyo Basin, was described in 1934 by Kraglievitch as the basis for the Huayquerian South American land mammal age. The name Huayquerías means "badlands". The formation comprises reddish mudstones with mudcracks, paleoburrows and ichnofossils of vertebrates. Thin sandstone layers of up to 12 centimetres (4.7 in) thick exist in the formation. An ashfall bed exists at 83 metres (272 ft) below the contact with the slightly angular unconformably overlying Tunuyán Formation in a total section of 126 metres (413 ft). The tuff has been dated using 40K/40Ar analysis to 5.84 ± 0.41 Ma.

Paleontological significance

The Huayquerías Formation has been used to define the Huayquerian South American land mammal age, ranging from 9.0 to 6.8 Ma. However, later analysis of the ashfall bed in the formation, provided a much younger age of 5.84 ± 0.41 Ma, extending the temporal range of the Huayquerian SALMAans until near the Miocene-Pliocene limit. The Huayqueriás Formation has provided fossils of Cyonasua pascuali, and the litoptern Huayqueriana cristata, the latter of which, named after the formation.

Worked examples

Example 1 — a first encounter with Huayquerías Formation

Start with the simplest possible case. Write down what Huayquerías 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 Huayquerías 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 Huayquerías 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 Huayquerías Formation

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

Read the reference excerpt below once, without taking notes.
Close the page and write down what Huayquerías 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 Huayquerías Formation out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Huayquerías Formation in simple terms?

Why does Huayquerías 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 Huayquerías 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 Huayquerías Formation.