Directorate of Mines & Geology
Government of Goa

Mineral Resources of Goa - BASALT

  • The entire state of Goa except a narrow patch in the North Eastern corner is covered by the rocks of Dharwar Super group of pre-cambrian age.
  • In general the basic intrusives like Dolerite & gabbro and acid intrusives like matagreywacke, metabasalt, granite, Granite gneiss etc. are included.
  • North Eastern corner of the State is covered by Deccan traps and represented by Basalt rock.
  • Wide outcrops of the rocks are in Pernem, Sattari, Salcete, Sanguem and Quepem Talukas.
  • These rocks are used in concrete works, as a road metal and Railway ballast after crushing to required size. Though they vary from Granite gneiss to Metagreywacke, they are grouped together and locally called as Basalt Metal.
  • The above rocks are quarried by using blasting operations and the boulders obtained are crushed to the required sizes.