“When we got close to the rocks in the quarry, we could see their banding was typical of Lewisian gneiss,” says Paul. Lewisian gneiss is metamorphic rock, which means it was formed by being heated up ...

Geologists point out that the soil in Bengaluru, Mysuru, and surrounding areas is silty and red, and the region is made up of metamorphic granite rock called Peninsular Gneiss. “The soil is not ...