Definition

A long, narrow ridge made of gravel that is formed by a stream flowing under or through a glacier.

Example

The hikers followed the esker, enjoying the unique landscape created by ancient glaciers.

Conversation

I just read about something called an esker in my geology class.

Oh really? What exactly is an esker?

It's a ridge of gravel formed by streams under glaciers.

That sounds interesting! I never knew glaciers could create something like that.

Synonyms & Antonyms

Root Explanation

The word 'esker' originates from the Irish word 'eiscir', meaning a ridge or bank. It refers specifically to a long, narrow ridge formed by glacial deposits.

Memory Tip

Imagine a long, narrow ridge formed by glaciers — that's what an esker is, derived from the Irish word for a ridge.

Visually Confused Words