- Sep 5, 2022
I found this near a wash in La Plata, New Mexico.
So your theory is someone at some time made round stone balls on their lathe(?) and then left them scattered all over the Colorado Plateau as well as several thousand different localities worldwide?the stone have sings around the circumference, like lathe markings...
if those signs are there because of different hardness of little strata and consequently differential erosion the stone can't be perfectly round...
pebbles are not round by nature because minerals and rocks are not equally hard in every direction so they are eroded with different speed