1) Archaeological artefact type
Found on
https://www.crosswordclues.com/clue/hammerstone
In archaeology, a hammerstone is a hard cobble used to strike off lithic flakes from a lump of tool stone during the process of lithic reduction. The hammerstone is a rather universal stone tool which appeared early in most regions of the world including Europe, India and North America. This technology was of major importance to prehistoric cultur...
Found on
http://en.wikipedia.org/wiki/Hammerstone
A stone, usually a rounded hard river pebble that shows battering scars resulting from repeated use as a hammer or platform in the flaking process.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
No exact match found.
