Definition

A type of fossilized structure made of layers formed by microorganisms, especially cyanobacteria, that trap and bind sediment over a long period.

Example

Stromatolites are some of the oldest evidence of life on Earth, dating back billions of years.

Conversation

Have you ever heard of a stromatolite?

Yeah, isn't it some kind of ancient rock formation?

Exactly! They were formed by microorganisms millions of years ago.

That's fascinating! I love how they tell us about Earth's history.

Synonyms & Antonyms

Root Explanation

Stromatolite → It is formed from "stromato-" (from Greek "stromatos", meaning layer or bed) and "-lite" (from Greek "lithos", meaning stone). The word refers to layered structures formed by the activity of microorganisms, particularly cyanobacteria, creating stone-like formations.

Memory Tip

Think of 'layers' ('stromato-') that are 'stone-like' ('-lite') — this helps you remember that stromatolites are layered stone structures created by living organisms.

Visually Confused Words