earth science

Pito Seamount

Pito Seamount 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 Pito Seamount rather than just read about it. In short: Pito Seamount is a seamount in the Pacific Ocean. It rises to a depth of 2,250 metres (7,380 ft) and features hydrothermal activity in the form of black smokers, which were discovered in 1993.

Key takeaways

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

Reference excerpt

Pito Seamount is a seamount in the Pacific Ocean. It rises to a depth of 2,250 metres (7,380 ft) and features hydrothermal activity in the form of black smokers, which were discovered in 1993.

Geography and geology

Regional Pito seamount lies north-northwest of Easter Island. In 1993, during the "Pito" expedition the submarine Nautile discovered active black smokers at its foot or at the summit. The region northwest of Easter Island is characterized by the Easter Microplate, a plate set within the East Pacific Rise. Two rift zones delimit eastward and westward, while the Pito and the Orongo fracture zones form its northern and southern border, respectively. Pito seamount lies on the fracture zone of the same name and may indicate incipient seafloor spreading.

Local Pito seamount has an 18 kilometres (11 mi) wide base, rises to a depth of 2,250 metres (7,380 ft) and features a 50 metres (160 ft) deep and almost 1 kilometre (0.62 mi) wide axial valley. Several smaller cones dot Pito's surface, and the seafloor depression, Pito Deep, lies northwest of the seamount. Fresh basaltic pillow lavas with geochemical characteristics typical of mid-ocean ridge basalts occur on Pito, as do sheet and lobate lava flows. The lavas often have a glassy surface. The first black smokers have been found at depths of 2,243 metres (7,359 ft) at the foot of Pito seamount. A number of black smoker fields are found on Pito and are named Abe, Jason, Magnificent Village, Medea, Scotty's Castle and Sentry; the field originally discovered in 1993 is Magnificent Village and is also the largest. About fifty vents, some active and others inactive, have been observed in the summit area. Temperatures range 338–370 °C (640–698 °F). Extensive faulting in the region may aid in the establishment of a hydrothermal circulation. Hydrothermal deposits contain chalcopyrite, marcasite, melnikovite, pyrite, sphalerite as well as general iron and zinc sulfides. Anhydrite and amorphous silica were also found at low frequency. Traces of bacterial activity, such as small pores and oxidation products, have been found in the hydrothermal deposits.

Biology Actinides, alvinellids, sea anemones, crabs, gastropods, mussels and shrimps have been encountered at the hydrothermal vents of Pito seamount. The biological community is not very diverse either due to a waning of hydrothermal activity or biogeographical barriers and lacks vestimentiferans. On inactive vents, brittle stars are found. Overall, the biota of Pito Seamount resembles that of other segments of the East Pacific Rise.

References

Sources

External links Woods, Daniel; Cheadle, Michael J.; John, Barbara E.; German, Christopher R.; Van Dover, Cindy L. (2022). "Making Use of Relicts: Brisingid Seastars Aggregate on Hydrothermally Inactive Sulfide Chimneys Near Black Smokers". Frontiers in Marine Science. 9. doi:10.3389/fmars.2022.774628. hdl:1912/29025. ISSN 2296-7745.

Worked examples

Example 1 — a first encounter with Pito Seamount

Start with the simplest possible case. Write down what Pito Seamount 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 Pito Seamount 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 Pito Seamount 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 Pito Seamount

In research: Pito Seamount 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 Pito Seamount 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: Pito Seamount is common in secondary-school and first-year university syllabi. It links to neighbouring topics Hydrothermal vents, Seamounts of the Pacific Ocean, so understanding it makes those chapters shorter.
In everyday life: Look for Pito Seamount 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 Pito Seamount in 20 minutes

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

Frequently asked questions

What is Pito Seamount in simple terms?

Pito Seamount is a seamount in the Pacific Ocean. It rises to a depth of 2,250 metres (7,380 ft) and features hydrothermal activity in the form of black smokers, which were discovered in 1993.

Why does Pito Seamount 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 Pito Seamount?

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 Pito Seamount.