Hi pal,
Here the list of colleges in south which offers education in b. Sc geology.

1.jain university, banglore.

2. presidency collage, chennai .

3. Goa university ,north goa.

4. Ramkrishna Mission Vivekananda College,chennai.

5.guru nanak college, chennai.

6.The new College, chennai.

7. Justice Basheer Ahmed Sayeed college for women,chennai.

8.VELS university ,Chennai.

9.PMU ,thanjavur.

10. Bishop herber college,  Tiruchirapalli.

Hope this will help you.
Good luck.