earth science

Sacajawea Patera

Sacajawea Patera 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 Sacajawea Patera rather than just read about it. In short: Sacajawea Patera is a large, elongate caldera located in Western Ishtar Terra on the smooth plateau of Lakshmi Planum, on the planet Venus. The image is centred at 64.5 degrees North latitude and 337 degrees East longitude.

Key takeaways

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

Reference excerpt

Sacajawea Patera is a large, elongate caldera located in Western Ishtar Terra on the smooth plateau of Lakshmi Planum, on the planet Venus. The image is centred at 64.5 degrees North latitude and 337 degrees East longitude. It is approximately 420 km (260 mi) wide at the base. Sacajawea is a depression approximately 1–2 kilometres (0.62–1.24 mi) deep and 120 by 215 kilometres (75 mi × 134 mi) in diameter; it is elongate in a southwest–northeast direction. The depression is bounded by a zone of circumferential curvilinear structures interpreted to be graben and fault scarps. These structures are spaced 0.5–4 kilometers (0.31–2.49 miles) apart, are 0.6–4.0 kilometers (0.37–2.49 miles) in width and up to 100 km (62 mi) in length. Extending up to approximately 140 km (87 mi) in length from the southeast of the patera is a system of linear structures thought to represent a flanking rift zone along which the lateral injection and eruption of magma may have occurred. A shield edifice 12 km (7.5 mi) in diameter with a prominent central pit lies along the trend of one of these features. The impact crater Zlata, approximately 6 km (3.7 mi) in diameter is located within the zone of graben to the northwest of the patera. Few flow features are observed in association with Sacajawea, possibly due to age and state of degradation of the flows. Mottled bright deposits 4–20 kilometers (2.5–12.4 miles) in width are located near the periphery and in the center of the patera floor within local topographic lows. Diffuse patches of dark material approximately 40 kilometers (25 mi) in width are observed southwest of the patera, superposed on portions of the surrounding graben. The formation of Sacajawea is thought to be related to the drainage and collapse of a large magma chamber. Gravitational relaxation may have caused the resultant caldera to sag, producing the numerous faults and graben that circumscribe the patera. Regions of complex, highly deformed tessera-like terrain are located north and east of the patera and are seen in the upper portion of the image.

References "Venus—A Large Elongated Caldera 'Sacajawea Patera". NASA/JPL. Retrieved 24 November 2010.

Illustrations

Worked examples

Example 1 — a first encounter with Sacajawea Patera

Start with the simplest possible case. Write down what Sacajawea Patera 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 Sacajawea Patera 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 Sacajawea Patera 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 Sacajawea Patera

In research: Sacajawea Patera 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 Sacajawea Patera 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: Sacajawea Patera is common in secondary-school and first-year university syllabi. It links to neighbouring topics Extraterrestrial volcanic calderas, Venus stubs, Volcanoes of Venus, so understanding it makes those chapters shorter.
In everyday life: Look for Sacajawea Patera 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 Sacajawea Patera in 20 minutes

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

Frequently asked questions

What is Sacajawea Patera in simple terms?

Why does Sacajawea Patera 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 Sacajawea Patera?

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 Sacajawea Patera.