Additional signs of modification on the stone include a pitted area at the point of fracture and percussion scars on the edges of the smaller fragment (Ray 2000:69). Three use-wear specialists have been consulted. Tom Dillehay of the Monte Verde site states that micro-use-wear analysis shows that the stone is manmade. Marvin Kay, a lithics expert from the University of Arkansas, and Stanley Ahler, a micro-use-wear investigator, both believe the modifications to be the result of natural actions (Ray 2000:70; Chandler 2001b).