earth science

Shackleton fracture zone

Shackleton fracture zone 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 Shackleton fracture zone rather than just read about it. In short: The Shackleton fracture zone (SFZ) is an undersea fracture zone, oceanic ridge and fault located in the Drake Passage, at the separation between the Scotia plate from the Antarctic plate. It extends between 59° and 60°40' south latitude and between 56°30' and 61° west longitude and runs in a northwest to southeast direction from the South American continental shelf to the South Shetland Islands.

Key takeaways

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

Reference excerpt

The Shackleton fracture zone (SFZ) is an undersea fracture zone, oceanic ridge and fault located in the Drake Passage, at the separation between the Scotia plate from the Antarctic plate. It extends between 59° and 60°40' south latitude and between 56°30' and 61° west longitude and runs in a northwest to southeast direction from the South American continental shelf to the South Shetland Islands. Chile claims the area as part of its Outer Continental Shelf boundary. The name, recognized by the Advisory Committee on Underwater Features (ACUF) since June 1987, is named after the Anglo-Irish polar explorer Ernest Shackleton (1874–1922).

Natural delimitation between the Pacific and South Atlantic oceans

Scientists in Chile and other countries postulated that the boundary between the southeastern Pacific Ocean and the southwestern Atlantic Ocean was not the Cape Horn meridian, but rather the Shackleton fracture zone mid-oceanic ridge and a submarine orographic chain which links the Tierra del Fuego Archipelago with the Antarctic continent. It also considers the conventional border of the Southern Ocean at the 60°S parallel. The researchers Juan Ignacio Ipinza Mayor and Cedomir Marangunic Damianovic put forward the scientific theory that the separation of the Pacific and Atlantic Ocean oceans "could be confirmed from the so-called Shackleton Fracture Zone (...) the boundary is then located east of the so-called Cape Horn Meridian". In 2019, the scientific journal Geology is News published "The SFZ separates tectonic plates and oceans, to the east the Scotia plate and to the west the Antarctic plate (which includes the former Phoenix plate), and to the west the Pacific Ocean and to the east the Atlantic Ocean." In 2004 The Geological Society of America in the scientific paper entitled Shackleton Fracture Zone: No barrier to early circumpolar ocean circulation posits that: "the Shackleton Fracture Zone could have blocked the gateway until the early Miocene. Geophysical and geochemical evidence presented here suggests that the Shackleton Fracture Zone is an oceanic transverse ridge".

See also Ernest Shackleton Luis Pardo Borders of the oceans Natural delimitation between the Pacific and South Atlantic oceans by the Scotia Arc

References

External links "Marine Gazetteer Placedetails: Shackleton Fracture Zone". This article incorporates public domain material from "Shackleton fracture zone". Geographic Names Information System. United States Geological Survey.

Illustrations

Worked examples

Example 1 — a first encounter with Shackleton fracture zone

Start with the simplest possible case. Write down what Shackleton fracture zone 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 Shackleton fracture zone 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 Shackleton fracture zone 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 Shackleton fracture zone

In research: Shackleton fracture zone 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 Shackleton fracture zone 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: Shackleton fracture zone is common in secondary-school and first-year university syllabi. It links to neighbouring topics Argentine Antarctica, British Antarctic Territory, Chilean Antarctic Territory, so understanding it makes those chapters shorter.
In everyday life: Look for Shackleton fracture zone 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 Shackleton fracture zone in 20 minutes

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

Frequently asked questions

What is Shackleton fracture zone in simple terms?

Why does Shackleton fracture zone 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 Shackleton fracture zone?

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 Shackleton fracture zone.