blue mud

noun

, Geology, Oceanography.

1. a deep-sea sediment of fine silt and clay that derives its bluish color from organic material and iron sulfide.

Word History and Origins

Origin of blue mud¹

An Americanism dating back to 1830–40

Example Sentences

The north of Blue-Mud Bay has furnished also specimens of ancient sandstone; with columnar rocks, probably of clink-stone.

From Project Gutenberg

Stumps by the hundred, three to fifteen feet high, rooted in a stream of fine blue mud on cobbles, still have their bark on.

From Project Gutenberg

Here and there I find gems of thought, but one has to wade through a morass of blue mud to get at them.

From Project Gutenberg

We steered on till eight o'clock, and then anchored in 21 fathoms, blue mud.

From Project Gutenberg

We sounded with twenty-six fathoms, over a bottom of blue mud.

From Project Gutenberg