earth science

President Jackson Seamounts

President Jackson Seamounts 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 President Jackson Seamounts rather than just read about it. In short: The President Jackson Seamounts are a series of seamounts (underwater volcanoes) located on the Pacific Plate, off of California. It consists of 8 seamounts, 4 independent and 4 morpohologically fused, just west of the northern Gorda Ridge.

Key takeaways

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

Reference excerpt

The President Jackson Seamounts are a series of seamounts (underwater volcanoes) located on the Pacific Plate, off of California. It consists of 8 seamounts, 4 independent and 4 morpohologically fused, just west of the northern Gorda Ridge. They are generally very small, and arranged linearly. The assembly consists of 8 seamounts arranged in a chain. The easternmost of the seamounts is located about 53 km (33 mi) east of the axial ridge that spawned the volcanoes, Gorda Ridge. The chain was mapped initially with SeaBeam equipment in 1985, however its incomplete coverage limited its usefulness. A GLORIA sidescan survey conducted in 1986 further established the rough size and locations of the seamounts. A further sampling cruise by the United States Geological Survey (USGS) recovered pillow lava and hyaloclastite from 4 of the 8 volcanoes. The samples seemed to be of more primitive origin then those erupted elsewhere on the ridge. In 1998, the Monterey Bay Aquarium Research Institute conducted two dives on a cone cluster located southeast of the main structure. The chain consists of eight volcanoes. Of these, four are self-dependent, whereas the other four form twin fused, morphologically complex, flat-topped structures. The volcanoes form a linear chain, and are relatively small, measuring less than 10 km (6 mi) in diameter, and are nearly circular in shape. They average 47 km3 (11 cu mi)±14 km3 (3 cu mi) in volume, but range from 24 km3 (6 cu mi) to 68 km3 (16 cu mi). In addition to the eight main seamounts, there is a scattered disk of minor volcanic cones and flows about 13 km (8 mi) southeast of the chain. The summits of the seamounts, with the exception of the second one from the northwest, are all flat. Several have nested or cross-layered calderas and pit craters (29 in total), many of which push into the flank of the volcanoes. In several cases, newer volcanic structures have all but erased older ones. In addition to all this the seamounts are pocketed by multiple small cones, and are littered by debris ranging far and wide from the range. There is evidence of erosional activity throughout, with erosional valleys and landslide debris visible.

Worked examples

Example 1 — a first encounter with President Jackson Seamounts

Start with the simplest possible case. Write down what President Jackson Seamounts 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 President Jackson Seamounts 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 President Jackson Seamounts 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 President Jackson Seamounts

In research: President Jackson Seamounts 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 President Jackson Seamounts 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: President Jackson Seamounts is common in secondary-school and first-year university syllabi. It links to neighbouring topics Ridge volcanoes, Seamount chains, Seamounts of the Pacific Ocean, so understanding it makes those chapters shorter.
In everyday life: Look for President Jackson Seamounts 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “President Jackson Seamounts” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study President Jackson Seamounts in 20 minutes

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

Frequently asked questions

What is President Jackson Seamounts in simple terms?

Why does President Jackson Seamounts 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 President Jackson Seamounts?

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 President Jackson Seamounts.