This piece most closely resembles points known as McKean Stemmed of the Middle Archaic period around 4200 years ago. Although not a common form, several points of this style are reported from Leigh Cave in northern Wyoming. It is made of basalt from Antonito, NM. It is 57 mm long, 28 mm wide, 5 mm thick and weighs 10.2 grams.
Stemmed McKean Point replica R1223