blue lias

noun

1. a type of rock composed of alternating layers of bluish shale or clay and grey argillaceous limestone See also Lias

Example Sentences

In the course of last year; a fossil crocodile was dug up at Allemagne, a village about a mile distant, imbedded in blue lias.

From Project Gutenberg

With this in mind, the contractors proposed to substitute an English Blue Lias lime as a grouting material.

From Project Gutenberg

The base of the cliffs consists entirely of a very soft and plastic blue lias mud.

From Project Gutenberg