Testudinate

On Turtle Island, the key to Native American Stone Work is the Turtle.

The photo is a little blurry, but here's a detail of a stacked stone feature that illustrates the addition of turtle legs and a head to a rather testudinate or shell like stone in a Stone Prayer...

Kodtonquag (Nipmeuw) or Káhtôquwuk  (Narragansett), allegorically, a 'stone prayer.'

káhtôquwuk  NI a pile, a heap, that which is heaped high, by placing one above another

 káhtôquwukansh (plural)  “heaps” “Stone Prayers”

 káhtôquwukanuk   “in the pile” 

https://www.moheganlanguage.org/?s=k%C3%A1ht%C3%B4quwuk