Definition

A type of rock formed from glacial debris that has been compacted and cemented together.

Example

The geologist studied the tillite to understand the effects of ancient glaciers on the landscape.

Conversation

Have you ever heard of tillite?

I think I read something about it in a geology class.

Yeah, it's basically rock made from compacted glacial till.

That sounds interesting! I never realized how much history could be in rocks.

Synonyms & Antonyms

Root Explanation

Tillite is derived from 'till' (from Old English 'tyll', meaning to prepare or to cultivate) and the suffix '-ite' (meaning related to or derived from). The word 'tillite' refers to a type of rock formed from glacial till, indicating its origin from the material that has been prepared or deposited by glaciers.

Memory Tip

Think of 'till' as preparing or cultivating the land, and '-ite' indicating a type of rock. This helps you remember that 'tillite' is a rock formed from glacial deposits.

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