earth science

Tehuantepec Ridge

Tehuantepec Ridge 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 Tehuantepec Ridge rather than just read about it. In short: The Tehuantepec Ridge (Tehuantepec Fracture Zone, Tehuntepec Ridge) is a linear undersea ridge located off the west coast of Mexico in the Pacific Ocean. It is the remnant of an old fracture zone, and not a tectonic spreading center ridge (see mid-ocean ridge).

Key takeaways

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

Reference excerpt

The Tehuantepec Ridge (Tehuantepec Fracture Zone, Tehuntepec Ridge) is a linear undersea ridge located off the west coast of Mexico in the Pacific Ocean. It is the remnant of an old fracture zone, and not a tectonic spreading center ridge (see mid-ocean ridge). It extends from the eastern end of the Clipperton fracture zone northeastward toward Mexico into Chiapas and El Chichón until it is subducted into the Middle America Trench. It lies within the tectonic Cocos plate, separating the lower and older seafloor of the Guatemala Basin which lies southeast of the ridge from higher and younger seafloor which lies to its north-west. Current research indicates that the ridge was formed as a fracture zone and transform fault along the East Pacific Rise. As a result of a change in the motion of the Pacific plate about 13 million years ago, there was also a change in the orientation of the East Pacific Rise, which in turn reoriented the fracture zone, creating the current alignment that is today's Clipperton Fracture Zone. The Tehuantepec Ridge preserves the previous orientation. To its north the O’Gorman Fracture Zone has a similar orientation. Some researchers have hypothesized that the subducted portion of the Tehuantepec Ridge under Mexico is responsible for the existence of El Chichón volcano as well as the other volcanoes of what is called the Chiapanecan Volcanic Arc. Studies of the 1982 eruption of El Chichón indicated its erupted output was unusual compared to other volcanoes in the Trans-Mexican Volcanic Belt which lies well to the northwest. The anomaly is thought to result from the distinctive composition of the rocks which comprise the Tehuantepec Ridge.

References

Further reading Manea, Marina, et al., Tectonic evolution of the Tehuantepec Ridge, Earth and Planetary Science Letters 238 (2005) 64– 77 (1.9mb)

Worked examples

Example 1 — a first encounter with Tehuantepec Ridge

Start with the simplest possible case. Write down what Tehuantepec Ridge 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 Tehuantepec Ridge 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 Tehuantepec Ridge 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 Tehuantepec Ridge

In research: Tehuantepec Ridge 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 Tehuantepec Ridge 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: Tehuantepec Ridge is common in secondary-school and first-year university syllabi. It links to neighbouring topics Geography of Mexico, Geology of Mexico, Mexico geography stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Tehuantepec Ridge 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 Tehuantepec Ridge in 20 minutes

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

Frequently asked questions

What is Tehuantepec Ridge in simple terms?

Why does Tehuantepec Ridge 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 Tehuantepec Ridge?

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 Tehuantepec Ridge.