earth science

Quartz latite

Quartz latite 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 Quartz latite rather than just read about it. In short: A quartz latite is a volcanic rock or fine grained extrusive rock composed mostly of alkali feldspar and plagioclase with some quartz. It forms from the rapid cooling of magma of intermediate composition but moderately enriched in alkali metal oxides.

Key takeaways

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

Reference excerpt

A quartz latite is a volcanic rock or fine grained extrusive rock composed mostly of alkali feldspar and plagioclase with some quartz. It forms from the rapid cooling of magma of intermediate composition but moderately enriched in alkali metal oxides. Quartz latite is intermediate between latite and rhyolite in its mineralogy.

Description

Quartz latite is the fine-grained equivalent of a quartz monzonite, containing approximately equal amounts of plagioclase and alkali feldspar and between 5% and 20% quartz and with plagioclase making up 35% to 65% of its total feldspar content. Quartz latite is not a recognized rock type in the TAS classification used to chemically classify glassy or very fine-grained volcanic rock.

Occurrence Quartz latite is found in the 130-135 Mya Etendeka Formation of Namibia, where it forms extensive sheets in association with tholeiitic basalt. These are interpreted as densely welded ash flow tuffs. Some of the quartz latite flows were enormous, with estimated volumes of 2,320 cubic kilometers (560 cu mi) and 6,340 cubic kilometers (1,520 cu mi) for two of the flows. Paleoproterozoic quartz latite is abundant in the Roxby Downs area of Australia, and may have been a source rock for younger granitoids. Quartz latite is found at the Bingham mine in Utah in association with its plutonic counterpart, quartz monzonite.

References

Illustrations

Worked examples

Example 1 — a first encounter with Quartz latite

Start with the simplest possible case. Write down what Quartz latite 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 Quartz latite 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 Quartz latite 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 Quartz latite

In research: Quartz latite 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 Quartz latite 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: Quartz latite is common in secondary-school and first-year university syllabi. It links to neighbouring topics Petrology stubs, Subvolcanic rocks, Volcanic rocks, so understanding it makes those chapters shorter.
In everyday life: Look for Quartz latite 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 Quartz latite in 20 minutes

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

Frequently asked questions

What is Quartz latite in simple terms?

Why does Quartz latite 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 Quartz latite?

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 Quartz latite.