I don't really dig in fields per say I go into logging clearcuts and find sites above creeks. I'll walk them out, and usually a single clearcut that produces will have several sites, usually it seems there was a main site and some lesser sites and then what I call lookout sites where you only find a small amount usually on the ridges. These main sites will usually let you know if its worth digging by the amount of flint on the surface after a few rains after the dozers finish up. If there are large amounts or some even lesser amounts I'll dig in and see how much debitage comes up. If its enough to keep me interested I'll keep digging...say a flake every 3 minutes or less anything less than about that average I get bored pretty soon and give up unless I had made some good finds then that will keep me persistent on a site thats not putting out much flint. I've gotten into spots probably debitage pits where there is more flint pouring out than there is dirt. You should call it quits when you dont find flint more than a pc every 5-10 minutes i mean that wold wear someone out and probably the chances of finding stuff before your arm wore out would pretty low.
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