I agree with this as far as the impressions for the thumb and finger,but then that also means this is true,no?-Cannonman17 said:the dimple in the rock is not from a persons thumb nor was it made to fit a thumb. stones with this type of wear pattern got them from being used as a platform for 1) breaking hard shells of nuts on them, 2) using them as a platform for flintknapping purposes or in some cases 3) as a platform for starting a fire- You can take a piece of hard stone like this and use it has a hammer stone for years and years pounding away with it and the outside edges where it impacts are will wear down but your thumb won't wear a spot into it. Likewise, specially with this hard of a stone it wouldn't be time effective to put a spot for your thumb- in terms of a hammerstone it's just not that beneficial.
So the answer to this could be yes in both cases? There is such a thing as a multi-purpose groundstone,yes? Just trying to learn something here.diggummup said:Is a hammer stone and a nutting stone the same thing? Or are they used in conjuction with one another?