earth science

Seymour Island

Seymour Island 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 Seymour Island rather than just read about it. In short: Seymour Island or Marambio Island, is an island in the chain of 16 major islands around the tip of the Graham Land on the Antarctic Peninsula. Graham Land is the closest part of Antarctica to South America.

Key takeaways

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

Reference excerpt

Seymour Island or Marambio Island, is an island in the chain of 16 major islands around the tip of the Graham Land on the Antarctic Peninsula. Graham Land is the closest part of Antarctica to South America. It lies within the section of the island chain that resides off the east side of the peninsula's northernmost tip. Within that section, it is separated from Snow Hill Island by Picnic Passage, and sits just east of the larger key, James Ross Island, and its smaller, neighboring island, Vega Island. Seymour Island is sometimes called Marambio Island or Seymour-Marambio Island, taking its resident Argentine base as its namesake (see section, Base Antárctica Marambio, below).

Sailing directions The US Defense Mapping Agency's Sailing Directions for Antarctica (1976) describes Seymour Island as follows:

Seymour Island lies northeastward of Snow Hill Island, from which it is separated by a strait about 1 mile wide. Strong currents and tide rips exist in this channel which shoals to less than 1.8mi (1 nm) in the center of the channel at low tide. The bottom deepens steeply on the northwestern side of the channel. The Island is 8 miles long and about 4 miles wide opposite Bodman Point (Cape Bodman) on the northwestern coast; the ends on the island are about 2 miles wide. It is entirely snow-free and of remarkable appearance. The northern portion of the island is a high, level, extensive plateau which reaches an elevation of 591 feet. Below this smooth plateau are terraces containing valleys and small irregular knolls of hard rock.A transverse valley, the bottom of which is not much above sea level, cuts through the island from east to west. This valley opens into Papua Beach (Penguin Bay) on the eastern shore, and into an unnamed bay on the opposite shore east of Bodman Point. From Papua Beach to the northeastern extremity of the island runs a strip of deeply diffracted land. The southwestern portion of the island offers an appearance in marked contrast with the smooth surface of the northern portion. The southern half of the island has a peculiar ribbed appearance, being low and deeply dissected with many low hills between the erosive lines. Low perpendicular rock cliffs border the shore line but there are many landing places where the gorges slope gradually to the sea.A depot of provisions was placed by Nordenskjold in 1903 at a cairn in the valley behind Penguin Bay.

Historic site A wooden plaque and rock cairn stand at Penguins Bay, on the southern coast of Seymour Island. The plaque was placed on 10 November 1903 by the crew of the Argentinian Corvette Uruguay on a mission to rescue the members of the Swedish expedition led by Otto Nordenskiöld. The cairn was erected in January 1990 by Argentina at the site of the plaque in commemoration of the same event. The site has been designated a Historic Site or Monument (HSM 60), following a proposal by Argentina to the Antarctic Treaty Consultative Meeting. The inscription on the plaque, placed where the two parties met, reads:

"10.XI.1903 Uruguay (Argentine Navy) in its journey to give assistance to the Swedish Antarctic expedition".

Base Antárctica Marambio

Located in the island is the Marambio Base which is the main Argentine base in Antarctica operating an airfield (ICAO SAWB) for wheeled landing the whole year. In winter the base has an average of 55 crew members, but in summer the population of the base can grow to 180.

Climate The average temperatures on Seymour Island, as measured at Base Antárctica Marambio, are 1 °C (33.8 °F) during the summer and −21 °C (−5.8 °F) during the winter. In the wintertime, however, strong winds can lower the wind chill temperature feeling to as low as −60 °C (−76 °F) on exposed skin. On 9 February 2020, a temperature of 20.75 °C (69.3 °F) was recorded on the island. However, on 1 July 2021, the World Meteorological Organization invalidated the reading because based on the analysis of the data, the air temperature was recorded in non-standard conditions, leading to bias and errors in the temperature sensor and readings.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Seymour Island

Start with the simplest possible case. Write down what Seymour Island 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 Seymour Island 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 Seymour Island 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 Seymour Island

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

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

Frequently asked questions

What is Seymour Island in simple terms?

Why does Seymour Island 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 Seymour Island?

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 Seymour Island.