earth science

Quebrada La Totora Formation

Quebrada La Totora 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 Quebrada La Totora Formation rather than just read about it. In short: The Quebrada La Totora Formation (previously known as Quebrada La Totora Beds or Estratos Quebrada La Totora) is a volcanic, volcaniclastic, sedimentary, and fossiliferous geological formation that outcrops near Pichasca and Condoriaco of the Coquimbo Region, northern Chile. It is dated back to the latest Early Cretaceous and Late Cretaceous, about 105 to 88 million years ago (Albian-Turonian).

Key takeaways

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

Reference excerpt

The Quebrada La Totora Formation (previously known as Quebrada La Totora Beds or Estratos Quebrada La Totora) is a volcanic, volcaniclastic, sedimentary, and fossiliferous geological formation that outcrops near Pichasca and Condoriaco of the Coquimbo Region, northern Chile. It is dated back to the latest Early Cretaceous and Late Cretaceous, about 105 to 88 million years ago (Albian-Turonian). The main lithology of the formation includes conglomerates, sandstones, and lacustrine limestones, with intercalations of andesitic to rhyolitic lavas, dacite, and tuffs. The Quebrada La Totora Formation preserves a rich fossil record of plants such as conifers, vertebrates, including dinosaurs (titanosaurs and abelisaurids), turtles, and crocodyliforms, and also freshwater molluscs including bivalves and gastropods. The Viñita Formation, which overlays the Quebrada La Totora Formation, was described in 1965 by Luis Aguirre Le-Bert and Ernesto Egert Ruiz as a geological formation composed of three members, with Member 1 including conglomerate and sandstone, and Member 2 comprising limestone. Later in 1969 Rodolfo M. Casamiquela and team described vertebrate and plant fossil material from Pichasca (Natural Monument Pichasca), at Río Hurtado. They assigned the strata and fossils to the Viñita Formation, and also described units A to F from this site. Teresa Torres and Monica Rallo also described petrified wood in 1981 from the Pichasca site (units A, C, D, E of Casamiquela and team). Carlos Emparan and Germán Pineda in 1999 informally defined Estratos Quebrada La Totora from the type locality Quebrada La Totora of Condoriaco, at La Serena, where they reassigned the two previously described members 1 and 2 of the Viñita Formation to this new unit. However, their description of Estratos Quebrada La Totora lacked the formal status of a geological formation. This reassignation was followed by other authors and meant a redefinition of the Viñita Formation, which was characterized as a primarily volcanic and volcaniclastic unit with some sedimentary intercalations. Pineda and Emparan in 2006 reinterpreted the Pichasca site as belonging to Estratos Quebrada La Totora along with the fossil content and defined four distinct facies. Despite these reinterpretations and definitions, some authors continued to attribute the fossils from Pichasca to the Viñita Formation. In 2026 the unit was formally defined by Esteban Salazar and team, coining the term Quebrada La Totora Formation. As such, the known fossils from Pichasca are confined to the fossiliferous levels of the Quebrada La Totora Formation.

Paleobiota of the Quebrada La Totora Formation

Amphibians

Crocodyliformes

Dinosaurs

Sauropods

Theropods

Fish

Molluscs

Bivalves

Gastropods

Plants

Angiosperms

Gymnosperms

Turtles

See also Arqueros Formation Quebrada Marquesa Formation Las Chilcas Formation

References

Worked examples

Example 1 — a first encounter with Quebrada La Totora Formation

Start with the simplest possible case. Write down what Quebrada La Totora 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 Quebrada La Totora 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 Quebrada La Totora 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 Quebrada La Totora Formation

In research: Quebrada La Totora 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 Quebrada La Totora 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: Quebrada La Totora Formation is common in secondary-school and first-year university syllabi. It links to neighbouring topics Conglomerate formations of Chile, Cretaceous Chile, Geologic formations of Chile, so understanding it makes those chapters shorter.
In everyday life: Look for Quebrada La Totora 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 Quebrada La Totora Formation in 20 minutes

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

Frequently asked questions

What is Quebrada La Totora Formation in simple terms?

Why does Quebrada La Totora 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 Quebrada La Totora 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 Quebrada La Totora Formation.