ledgestone

noun1

1. •
   A type of building or decorative stone veneer consisting of thin, flat, rectangular pieces of natural or manufactured stone, typically stacked in horizontal courses (often dry-stacked or mesh-mounted) to create a rugged, layered appearance with pronounced horizontal lines and textured shadows.

   • Cellar walls to be of ledgestone, 16 inches thick, laid dry and started on good ledgestone, laid in trenches one foot below cellar bottom. — 1879