Respected Sir,

Good to know you want to pursue geologist . I'm also pursing Geology. 

To become a geologist, you need to first get a BSc Geology . There are a number of colleges that provide this course. Some good ones are Xavier's Mumbai and Fergusson Pune.If your want to do it wrt to engineering, there are two colleges that provide geoscience engineering. 

You can do your masters at IIt or foreign. 

Hope I was able to help you.