earth science

Statherian

Statherian 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 Statherian rather than just read about it. In short: The Statherian ( ; Ancient Greek: σταθερός, romanized: statherós, meaning "stable, firm") is the fourth and final geologic period in the Paleoproterozoic Era, lasting from 1800 to 1600 million years ago (Ma) and spanning 200 million years. It follows the Orosirian Period and precedes the Calymmian Period, with the latter belonging to the Mesoproterozoic Era.

Key takeaways

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

Reference excerpt

The Statherian ( ; Ancient Greek: σταθερός, romanized: statherós, meaning "stable, firm") is the fourth and final geologic period in the Paleoproterozoic Era, lasting from 1800 to 1600 million years ago (Ma) and spanning 200 million years. It follows the Orosirian Period and precedes the Calymmian Period, with the latter belonging to the Mesoproterozoic Era. Instead of being based on stratigraphy, these dates are defined chronometrically. The period was characterized on most continents by either new platforms or final cratonization of fold belts. Oxygen levels were 10% to 20% of current values. Rafatazmia, controversially claimed to be present in Statherian beds in India, may be the oldest known confirmably eukaryotic fossil organism. By the beginning of the Statherian, the supercontinent Columbia had assembled. Approximately 1.7 billion years ago, natural nuclear fission reactors were generating power in what is now Oklo, Gabon.

See also Boring Billion – Earth history, 1.8 to 0.8 billion years ago

References

Further reading "Statherian Period". GeoWhen Database. Archived from the original on May 12, 2006. Retrieved January 5, 2006. James G. Ogg (2004). "Status on Divisions of the International Geologic Time Scale". Lethaia. 37 (2): 183–199. doi:10.1080/00241160410006492.

Illustrations

Worked examples

Example 1 — a first encounter with Statherian

Start with the simplest possible case. Write down what Statherian 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 Statherian 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 Statherian 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 Statherian

In research: Statherian 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 Statherian 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: Statherian is common in secondary-school and first-year university syllabi. It links to neighbouring topics Geochronology stubs, Geological periods, Paleoproterozoic, so understanding it makes those chapters shorter.
In everyday life: Look for Statherian 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 Statherian in 20 minutes

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

Frequently asked questions

What is Statherian in simple terms?

Why does Statherian 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 Statherian?

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 Statherian.