earth science

The Black Tusk

The Black Tusk 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 The Black Tusk rather than just read about it. In short: The Black Tusk, known as Q̓elqámtensa ti Skenknápa in the St'at'imcets (Lillooet) language and as T'ákt'akmúten tl'a Ín7inyáx̱a7en in the Sḵwx̱wú7mesh (Squamish) language, is a stratovolcano and a pinnacle of volcanic rock in Garibaldi Provincial Park of British Columbia, Canada. At 2,319 m (7,608 ft) above sea level, the upper spire is visible from a great distance in all directions.

Key takeaways

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

Reference excerpt

The Black Tusk, known as Q̓elqámtensa ti Skenknápa in the St'at'imcets (Lillooet) language and as T'ákt'akmúten tl'a Ín7inyáx̱a7en in the Sḵwx̱wú7mesh (Squamish) language, is a stratovolcano and a pinnacle of volcanic rock in Garibaldi Provincial Park of British Columbia, Canada. At 2,319 m (7,608 ft) above sea level, the upper spire is visible from a great distance in all directions. It is particularly noticeable from the Sea-to-Sky Highway just south of Whistler, British Columbia. Distinctive and immediately identifiable, The Black Tusk is among the best known mountains in the Garibaldi Ranges of the Coast Mountains. The volcano is part of the Garibaldi Volcanic Belt which is a segment of the Canadian Cascade Arc, but it is not within the geographic boundary of the Cascade Range.

Indigenous The mountain traditionally is part of the border line between the Squamish and Lil'wat nations. To the Squamish people, this mountain is known as T'ákt'akmúten tl'a Ín7inyáx̱a7en, which means "Landing Place of the Thunderbird", speaking of the supernatural Ín7inyáx̱a7en or Thunderbird. The jagged shape of the mountain and its black colouring are said to come from the Thunderbird's lightning. The same is true for Mount Cayley, another stratovolcano farther north.

Geology The Black Tusk is considered to be the remnant of an extinct andesitic stratovolcano which formed between about 1.3 and 1.1 million years ago. Following glacial dissection, renewed volcanism produced the lava dome and flow forming its summit about 170,000 years ago. According to Natural Resources Canada, The Black Tusk was "perhaps the conduit for lava within a cinder-rich volcano. The loose cinder has eroded, leaving only the hard lava core." The exposed lava rock of the core is loose and friable. It is also black, giving the mountain its name and character. Cinder Cone, to the east of The Black Tusk, produced a 9 km (6 mi) long lava flow during the late Pleistocene or early Holocene. The mountain currently hosts two significant glaciers, in large cirques carved into the northeastern and northwestern flanks of the broad cone below the lava pinnacle. Both glaciers start from about 2,100 m (6,890 ft) and flow northwards to below 1,800 m (5,906 ft). The glaciers are heavily covered in rocky debris due to the crumbling nature of the Tusk's rock. The Black Tusk is a member of the chain of volcanic peaks that run from southwestern British Columbia to northern California. The peaks formed in the past 35 million years as the Juan de Fuca, Gorda and Explorer plates to its west have been subducting under the North American Plate at the Cascadia subduction zone.

Recreation The Black Tusk's lower flanks and south summit are a popular backcountry hiking and scrambling destination. Most hikers approach from the Taylor Meadows campground to the south near Garibaldi Lake, although there is a second route from the north that travels by way of Helm Lake. The upper summit area at the top of the lava column can only be reached by scrambling up a short but exposed rock chimney to reach the south summit. The true summit, only about a metre higher, lies just to the north across a precipitous drop. It is rarely climbed, requiring a rappel of about 10 m (33 ft) into a notch followed by a loose and dangerous reascent up the crumbling lava. On the northern side of the north summit stands an isolated and intimidating rock formation known as the "Bishop's Mitre", which is rumoured to be unclimbed.

Gallery

See also Cascade Volcanoes Garibaldi Volcanic Belt List of volcanoes in Canada Volcanism of Canada Volcanism of Western Canada

References

External links

"The Black Tusk". Bivouac.com. "Black Tusk, The". BC Geographical Names. Government of British Columbia – B.C. Geographical Names Office (BCGNO). "Black Tusk". Catalogue of Canadian volcanoes. Archived from the original on 2011-07-16. Garibaldi Provincial Park (Black Tusk/Garibaldi Lake Area) "Garibaldi Lake". Global Volcanism Program. Smithsonian Institution. Natural Resources Canada (Garibaldi: Where Fire Met Ice)

Illustrations

Worked examples

Example 1 — a first encounter with The Black Tusk

Start with the simplest possible case. Write down what The Black Tusk 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 The Black Tusk 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 The Black Tusk 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 The Black Tusk

In research: The Black Tusk 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 The Black Tusk 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: The Black Tusk is common in secondary-school and first-year university syllabi. It links to neighbouring topics Extinct volcanoes of British Columbia, Garibaldi Lake volcanic field, Garibaldi Ranges, so understanding it makes those chapters shorter.
In everyday life: Look for The Black Tusk 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 The Black Tusk in 20 minutes

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

Frequently asked questions

What is The Black Tusk in simple terms?

Why does The Black Tusk 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 The Black Tusk?

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 The Black Tusk.