is it possible to get a high paying job after completing bsc geology?
In India High Paying Jobs means 1Lakh per month just after the Graduation.
Just after bsc geology you can't get a high paying job in your area of interest i.e in Geology field. Various other scopes opens only after completing your Msc or sometimes Phd.
Otherwise you can try UPSC CSE as it can provide a high paying government job and a respectable post of IAS or IPS.