This is a replica of one of the earliest point styles in South America. Its distribution goes from Belize to the southern tip of Argentina. It is best known from the Southern Cone. The type dates from around 12,800 years ago. This piece was made from obsidian from NW Argentina as part of a research project in Argentina. One of the channel flakes is included. It was produced by indirect percussion. This is the only piece of this obsidian I have. This replica is 70 mm long, 45 mm wide, 8 mm thick and weighs 23.3 grams.
Fishtail point with channel flake R1218
Check out: https://www.academia.edu/508043/Comments_on_South_American_Fishtail_Points_Design_Reduction_Sequences_and_Function