A mano is used with a metate in the grinding of grains and wild grasses, and also dried meat in the making of pemmican. A metate was the bottom flat stone, while the mano was held in the persons hand,and was rubbed or ground against the bottom stone while grinding the grain or dried meat. I hope this helps. You can find these here in Mt. Skeeterd you should find them in your area.
NG, Looks to me like that shell was body adornment of some kind. How deep were you, I see some calcifiation on that flint. Thats usually 4-5 k bp or better in your area isn't it? Lone Star
I got these out at about 3-1/2 -4 feet,not sure how long it takes to Calcify,but the Mano has some as well.I was told by a local and knowledgeable collector that the shell looks like it could be a spoon & I have found a worn out spoon at the same site.What ever it is it's rare for me and I am thrilled to have it .Thanx for all the comments ya'll