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.

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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.

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

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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.

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

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