We do live in the Iowa Great Lakes (Okoboji) region famous or not so famous for the Spirit Lake Massacre. We mostly found these artifacts when we were still plowing and field cultivating . Not so much in recent years with no-till farming practices. However I am thinking we need to revisit the hills overlooking the river bottom. Certainly evidence that there was much activity on our land; cool! A neighbor sold one of his collections to the Smithsonian Museums so yes there is a treasure chest below the surface.
Is that why you're called the grim reaper? Because you're so negative?