earth science

Sturgeon Lake Caldera

Sturgeon Lake Caldera 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 Sturgeon Lake Caldera rather than just read about it. In short: Sturgeon Lake Caldera is a large extinct caldera complex in Kenora District of Northwestern Ontario, Canada. It is one of the world's best preserved mineralized Neoarchean caldera complexes, containing well-preserved mafic-intermediate pillow lavas, pillow breccias, hyaloclastite and peperites, submarine lava domes and dome-associated breccia deposits.

Key takeaways

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

Reference excerpt

Sturgeon Lake Caldera is a large extinct caldera complex in Kenora District of Northwestern Ontario, Canada. It is one of the world's best preserved mineralized Neoarchean caldera complexes, containing well-preserved mafic-intermediate pillow lavas, pillow breccias, hyaloclastite and peperites, submarine lava domes and dome-associated breccia deposits. The complex is some 2.7 billion years old with a minimum strike length of 30 km (19 mi).

Geology The Sturgeon Lake Caldera contains a well preserved north facing homoclinal chain of greenschist facies metamorphosed intrusive, volcanic, and sedimentary layers. This piecemeal caldera complex includes nearly 3,000 m (9,843 ft) of major subaqueously deposited intracaldera fill. Episodes of subaerial and subaqueous explosive felsic volcanism created rhyodacitic to rhyolitic tuffs and lapilli tuffs. The caldera complex lies in the Sturgeon Lake greenstone belt. The Sturgeon Lake Caldera contains volcanic units that outcrop over 30 km (19 mi) from east to west with up to five separate, major ash flow tuff units with thickness ranging from 100 m (328 ft) to 1,200 m (3,937 ft). The Mattabi pyroclastic flow, with a thickness in excess of 800 m (2,625 ft) and a strike length of at least 30 km (19 mi), is the third and most voluminous eruptive event associated with the Sturgeon Lake Caldera. It hosts the 12-Mt Mattabi massive sulfide deposit which is interpreted to have formed on and below the seafloor, the latter through the processes of pore-space filling and replacement.

See also Volcanism of Canada Volcanism of Eastern Canada List of volcanoes in Canada

References

CAT.INIST - Sturgeon Lake Caldera Complex

External links Oxygen Isotope Studies of the Archean Sturgeon Lake Caldera Complex, Northern Ontario

Worked examples

Example 1 — a first encounter with Sturgeon Lake Caldera

Start with the simplest possible case. Write down what Sturgeon Lake Caldera 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 Sturgeon Lake Caldera 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 Sturgeon Lake Caldera 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 Sturgeon Lake Caldera

In research: Sturgeon Lake Caldera 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 Sturgeon Lake Caldera 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: Sturgeon Lake Caldera is common in secondary-school and first-year university syllabi. It links to neighbouring topics Archean calderas, Calderas of Ontario, Complex volcanoes, so understanding it makes those chapters shorter.
In everyday life: Look for Sturgeon Lake Caldera 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 Sturgeon Lake Caldera in 20 minutes

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

Frequently asked questions

What is Sturgeon Lake Caldera in simple terms?

Why does Sturgeon Lake Caldera 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 Sturgeon Lake Caldera?

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 Sturgeon Lake Caldera.