Hii..

I want to tell you that there is not much good placements for under graduation in Geology course at IISC Bangalore. IISC is one of the most reputed colleges in India and the college inspire and support the students for higher studies and for the research work instead of placements and joining companies. And under graduation in geology is not such a professional course after which you can expect jobs. 

My personal suggestion would be also to you that instead of thinking about the placements after your under graduation you should go for higher studies and research work.

Hope it helps.