I do not know where this fossil was found, the owner passed last year. I saw this in his 'rock pile'. He is from Oregon and frequently fished the coast and had a cabin in Summer Lake, Oregon and frequently hunted in this area of the high desert. It looked like a tooth to me. It has 18 ridges, it is 177.8mm long by 60mm wide and thickness is approximately 50 mm at the thickest part. I am just curious if anyone might know what it it. I thought it might be a tooth of some kind.
Thank you kindly.