trappean การใช้

• Karnataka consists of four main types of geological formations  the " Archean complex " made up of Dharwad schists and granitic gneisses, the " Proterozoic " non-fossiliferous sedimentary formations of the Kaladgi and Bhima series, the " Deccan trappean and intertrappean deposits " and the tertiary and recent laterites and alluvial deposits.