Definition

A type of rock that has layers and is formed from other rocks under heat and pressure, often similar to granite.

Example

The geologist collected a sample of gneiss to study its mineral composition.

Conversation

Have you ever seen a piece of gneiss before?

Yeah, I saw some at the geology museum last month.

It's such an interesting rock with those bands, isn't it?

Absolutely! The layers make it look really unique.

Synonyms & Antonyms

Root Explanation

Gneiss originates from the German word 'Gneis', which is derived from the Middle High German 'gneis' meaning 'spark' or 'to ignite'. The term refers to the banded appearance of the rock, resembling the sparkles of light.

Memory Tip

Imagine the sparkles of light ('gneis') that resemble the banded patterns in gneiss rock, helping you remember that gneiss is a type of rock with a sparkly appearance.

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