Definitions

from The Century Dictionary.

  • noun Calcareous shale; a variety of marl splitting into thin plates.

Etymologies

Sorry, no etymologies found.

Examples

  • Carboniferous period were deposited the vast coal-measures that yield us our chief combustive material; in the Permian (or the Dyas), in fine, the new red sandstone, the Zechstein (magnesian limestone), and the Kupferschiefer (marl-slate) were formed.

    The Evolution of Man — Volume 2

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