earth science

Timiskaming Graben

Timiskaming Graben 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 Timiskaming Graben rather than just read about it. In short: The Timiskaming Graben is a 400 km (250 mi) long and 50 km (31 mi) wide depression straddling the Ontario–Quebec border in Eastern Canada. It is a northwesterly extension of the Ottawa-Bonnechere Graben, a failed arm of the Saint Lawrence rift system which is related to the opening of the Iapetus Ocean.

Key takeaways

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

Reference excerpt

The Timiskaming Graben is a 400 km (250 mi) long and 50 km (31 mi) wide depression straddling the Ontario–Quebec border in Eastern Canada. It is a northwesterly extension of the Ottawa-Bonnechere Graben, a failed arm of the Saint Lawrence rift system which is related to the opening of the Iapetus Ocean. Formation of the Timiskaming Graben corresponded with collapse of the regional crust along the Quinze Dam and Cross Lake faults possibly as early as 2.4 billion years ago. It was then reactivated during periods of crustal extension related to the breakups of supercontinents Rodinia and Pangaea and during compression related to the various orogenies that formed the Appalachian Mountains. The Timiskaming Graben is now partially filled by Lake Timiskaming, a 100 km (62 mi) long successor to the much larger glacial Lake Barlow which drained at the end of the last glacial period about 8,000 years ago. The Timiskaming Graben is a seismically active structure in the Western Quebec Seismic Zone. Reactivation of faults has resulted in earthquakes, such as the 1935 Timiskaming earthquake.

References

Illustrations

Worked examples

Example 1 — a first encounter with Timiskaming Graben

Start with the simplest possible case. Write down what Timiskaming Graben 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 Timiskaming Graben 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 Timiskaming Graben 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 Timiskaming Graben

In research: Timiskaming Graben 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 Timiskaming Graben 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: Timiskaming Graben is common in secondary-school and first-year university syllabi. It links to neighbouring topics Aulacogens, Geology of Ontario, Geology of Quebec, so understanding it makes those chapters shorter.
In everyday life: Look for Timiskaming Graben 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 Timiskaming Graben in 20 minutes

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

Frequently asked questions

What is Timiskaming Graben in simple terms?

Why does Timiskaming Graben 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 Timiskaming Graben?

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 Timiskaming Graben.