earth science

Metavolcanic rock

Metavolcanic rock 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 Metavolcanic rock rather than just read about it. In short: Metavolcanic rocks are volcanic rocks that have experienced metamorphism. In other words, the rock was originally produced by a volcano, either as lava or tephra.

Key takeaways

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

Reference excerpt

Metavolcanic rocks are volcanic rocks that have experienced metamorphism. In other words, the rock was originally produced by a volcano, either as lava or tephra. The rock was then subjected to high pressure, high temperature or both, for example by burial under younger rocks, causing the original volcanic rock to recrystallize. Metavolcanic rocks are sometimes described informally as metavolcanics. When it is possible to determine the original volcanic rock type from the properties of the metavolcanic rock (particularly if the degree of metamorphism is slight), the rock is more precisely named by appylying the prefix meta- to the original rock type. For example, a weakly metamorphosed basalt would be described as a metabasalt, or a weakly metamorphosed tuff as a metatuff. Metavolcanic rock is commonly found in greenstone belts.

See also Metasedimentary rock – Metamorphic rock from a sedimentary precursor Metavolcanic Mountain – Mountain in Marie Byrd Land, Antarctica

References

Illustrations

Worked examples

Example 1 — a first encounter with Metavolcanic rock

Start with the simplest possible case. Write down what Metavolcanic rock 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 Metavolcanic rock 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 Metavolcanic rock 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 Metavolcanic rock

In research: Metavolcanic rock 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 Metavolcanic rock 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: Metavolcanic rock is common in secondary-school and first-year university syllabi. It links to neighbouring topics Metamorphic petrology, Metamorphic rocks, Rock stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Metavolcanic rock 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 Metavolcanic rock in 20 minutes

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

Frequently asked questions

What is Metavolcanic rock in simple terms?

Metavolcanic rocks are volcanic rocks that have experienced metamorphism. In other words, the rock was originally produced by a volcano, either as lava or tephra.

Why does Metavolcanic rock 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 Metavolcanic rock?

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 Metavolcanic rock.