earth science

Riachão Ring

Riachão Ring 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 Riachão Ring rather than just read about it. In short: The Riachão Ring is a meteorite impact crater in Brazil. It lies within the Parnaíba Basin.

Key takeaways

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

Reference excerpt

The Riachão Ring is a meteorite impact crater in Brazil. It lies within the Parnaíba Basin. It is 4.5 kilometres (2.8 mi) in diameter and the age is estimated to be less than 200 million years (Jurassic or younger). The crater is exposed at the surface. The structure was first identified from analysis of orbital photographs acquired during the Apollo–Soyuz Test Project in 1975. A reconnaissance investigation of the structure was reported by J. F. McHone in 1977. The structure of the site (dipping breccia along the rim) supported the interpretation of an impact origin, but no shatter cones or shocked quartz were found at the time. The crater is severely eroded and there is apparently no ejecta remaining. The crater rim rises about 50 metres (160 ft) above the surrounding surface, and a central uplift is about 30 metres (98 ft) above the annular depression within the rim. Shock deformation has been identified in quartz grains within the central uplift.

References

Illustrations

Worked examples

Example 1 — a first encounter with Riachão Ring

Start with the simplest possible case. Write down what Riachão Ring 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 Riachão Ring 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 Riachão Ring 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 Riachão Ring

In research: Riachão Ring 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 Riachão Ring 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: Riachão Ring is common in secondary-school and first-year university syllabi. It links to neighbouring topics Earth Impact Database, Geology of Brazil, Impact craters of Brazil, so understanding it makes those chapters shorter.
In everyday life: Look for Riachão Ring 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 Riachão Ring in 20 minutes

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

Frequently asked questions

What is Riachão Ring in simple terms?

The Riachão Ring is a meteorite impact crater in Brazil. It lies within the Parnaíba Basin.

Why does Riachão Ring 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 Riachão Ring?

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 Riachão Ring.