Yonkee points are part of the Middle Archaic dating between 3,200 and 2,500 yers old.  They are found mostly in NE Wyoming and SE Montana, centered on the Powder River Basin.  The type site is Powers-Yonkee.  These are well made points and were effectively used in bison hunting.  This piece is made of porcelinite from the Miles City, Montana area and was commonly used to make Yonkee points.  It is 70 mm long, 26.5 mm wide, 5 mm thick and weighs 12 grams.

Yonkee Point R1219