earth science

Ocean bank

Ocean bank 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 Ocean bank rather than just read about it. In short: An ocean bank, sometimes referred to as a fishing bank or simply bank, is a part of the seabed that is shallow compared to its surrounding area, such as a shoal or the top of an underwater hill. Somewhat like continental slopes, ocean bank slopes can upwell as tidal and other flows intercept them, sometimes resulting in nutrient-rich currents.

Key takeaways

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

Reference excerpt

An ocean bank, sometimes referred to as a fishing bank or simply bank, is a part of the seabed that is shallow compared to its surrounding area, such as a shoal or the top of an underwater hill. Somewhat like continental slopes, ocean bank slopes can upwell as tidal and other flows intercept them, sometimes resulting in nutrient-rich currents. Because of this, some large banks, such as Dogger Bank and the Grand Banks of Newfoundland, are among the richest fishing grounds in the world. There are some banks that were reported in the 19th century by navigators, such as Wachusett Reef, whose existence is doubtful.

Types Ocean banks may be of volcanic nature. Banks may be carbonate or terrigenous. In tropical areas some banks are submerged atolls. As they are not associated with any landmass, banks have no outside source of sediments. Carbonate banks are typically platforms, rising from the ocean depths, whereas terrigenous banks are elevated sedimentary deposits. Seamounts, by contrast, are mountains rising from the deep sea and are steeper and higher in comparison to the surrounding seabed. Examples of these are Pioneer and Guide Seamounts, west of the Farallon Islands. The Pioneer Seamount has a depth of 1,000 meters, In other cases, parts of a bank may reach above the water surface, thereby forming islands.

Prominent banks The largest banks in the world are:

Grand Banks of Newfoundland (280,000 km2) - terrigenous bank Agulhas Bank (116,000 km2) Great Bahama Bank (95,798.12 km2, has islands, area without islands) Saya de Malha (35,000 km2, excluding the separate North bank, least depth 7 m) Seychelles Bank (31,000 km2, including islands of 266 km2) Georges Bank (28,800 km2) - terrigenous bank Lansdowne Bank (4,300 km2, west of New Caledonia, least depth 3.7 m) Dogger Bank (17,600 km2, least depth 13 m) Little Bahama Bank (14,260.64 km2, has islands, area without islands) Great Chagos Bank (12,642 km2, including islands of 4.5 km2) Reed Bank, Spratly Islands (8,866 km2, least depth 9 m) Caicos Bank, Caicos Islands (7,680 km2, including islands of 589.5 km2) Macclesfield Bank (6,448 km2, least depth 9.2 m) North Bank or Ritchie Bank (5,800 km2, north of Saya de Malha, least depth <10 m) Cay Sal Bank (5,226.73 km2, including islands of 14.87 km2) Rosalind Bank (4,500 km2, least depth 7.3 m) Bassas de Pedro (2,474.33 km2, least depth 16.4 m), part of the Amindivi Subgroup of Lakshadweep, India

See also Oceanic plateau Carbonate platform Placer (geography)

Notes

External links Definitions – Islands, Banks & Seamounts: Geologic Features Under the Sea

Illustrations

Worked examples

Example 1 — a first encounter with Ocean bank

Start with the simplest possible case. Write down what Ocean bank 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 Ocean bank 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 Ocean bank 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 Ocean bank

In research: Ocean bank 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 Ocean bank 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: Ocean bank is common in secondary-school and first-year university syllabi. It links to neighbouring topics Physical oceanography, Undersea banks, so understanding it makes those chapters shorter.
In everyday life: Look for Ocean bank 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 Ocean bank in 20 minutes

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

Frequently asked questions

What is Ocean bank in simple terms?

Why does Ocean bank 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 Ocean bank?

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 Ocean bank.