I’m in South Central Kansas. I was just complaining how I’ve only found metal items, though the Indians were here. I was wondering if I would ever find anything from the stone era, and found this. �� This and the flint flakes were all 1 foot deep. Most of the mid 1800s stuff is 4-8” deep. I’m guessing the age and density must put the rock items at 1’ and below. Looking at buying ground penetrating radar!
I'm not sure if it was this forum or another defunct one, but a collector who used to post found a couple of those on a late Prehistoric site. (Dan Fox if I remember correctly, wrote a book on plains artifacts.)
I think that plump L style is found mostly in Nebraska and Kansas.