geology india extinction cretaceous plates tectonic zones deccan traps volcanic eruptions immense indicates remnant asteroid mesozoic dinosaurs geo contributed questioning
geography physiography geographical geological physiographic material formations ncert tnpsc
geological central tectonic citz cratons santosh modified surrounding
map geological cratons archaean belts proterozoic simplified craton basins sedimentary bastar cuddapah dharwar
southern granulite blocks geological santosh gsi shear zones suture
geological sgt shear gsi generalized santosh geology crustal sixth