The "Gkpf" pyroclastic flow deposots surrounding Tangkubanparahu volcano are non welded pyroclastic flows (ignimbrite) that cover an area of 200 km2. A simple calculation of the material lost during the formation of the Sunda caldera is 66 km3. The age of carbonized lost preserved in the deposit was 38,300 years. Major activity of Sunda vulcano began with a Plinian phase, followed by pyroclasti…