Hi there,

Some of the best colleges in DU offer BSc in geology such as:

Hans Raj College

Karori mal college

Hansraj college

H indu college

Venkateswara college

I.p college

Maitri college

College of science

Bhaskar Acharya college

other than that you can opt for PU (Punjab University), CUK(Central University of Karnataka), Pondicherry University, IIT Kharagpur, Indian Institute of ecology and environment.

Hope this helps. Best of luck :)