Origin of clay stone
First recorded in 1770–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for clay stone
The bulk of the island appears to be composed of a compound rock, formed of clay-stone and potstone intermixed.
The fire was soon kindled, and the clay-stone calumet filled with “kini-kinik.”The Scalp Hunters