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

Dr. Whiteside described the discovery of clues in rocks of England’s Blue Lias Formation, which emerged in the wake of the volcanism.

From New York Times

Lyme Regis is situated along a series of steep cliffs made up of stratified clay and limestone deposits, called blue lias for its blue-gray hue.

From Salon

“We’re not going to run out of fossils,” Mr. Pamplin said, indicating the Blue Lias.

From New York Times

Mr. Pamplin patiently explained to us that while fossilized Ichthyosaur skeletons were known to emerge from the subterranean Blue Lias strand exposed by the crumbling cliffs, we were more likely to find the bullet-shaped inner shells of squid-like creatures called belemnites, or beautiful fan-shaped ammonites.

From New York Times

The exposed cliffs reveal earthen layers of mudstone and limestone, known as Blue Lias.

From New York Times