Definition

A type of volcanic rock that is dark in color and contains high levels of magnesium and iron, typically found on the ocean floor and believed to come from the Earth's mantle.

Example

Tholeiite is commonly found in oceanic crust and is important for understanding the composition of the Earth's mantle.

Conversation

Have you ever heard of tholeiite?

No, I haven't. What is it?

It's a type of basaltic rock that's formed from magma rich in magnesium and iron.

That sounds interesting! I didn't know rocks could be so specific.

Synonyms & Antonyms

Root Explanation

Tholeiite is derived from the word 'tholeiitic', which comes from the Greek 'tholeos' (meaning to endure or to bear) and the suffix '-ite' (used to denote minerals or rocks). The term refers to a type of basaltic rock that is characterized by its ability to endure certain geological processes.

Memory Tip

Think of 'tholeos' meaning to 'endure' — tholeiite is a rock that can withstand geological changes.

Visually Confused Words