1) Native American tool
Found on
https://www.crosswordclues.com/clue/cupstone
Variously known as cupstones, `anvil stones,` `pitted cobbles` and `nutting stones,` among other names, these roughly discoidal or amorphous groundstone artifacts are among the most common lithic remains of Native American culture, especially in the Midwest, in Early Archaic contexts. Cup and ring marks are common in Europe where they are as...
Found on
http://en.wikipedia.org/wiki/Cupstone
in prehistoric European religion, an altar stone, megalithic tomb, or isolated stone slab incised with small cuplike markings. They are found mainly ...
Found on
http://www.britannica.com/eb/a-z/c/169
No exact match found.
