Hello Aspirant

Yes, you can Study geology and also you can pursue Bsc geography after your class 12 from humanities stream but you must have studied geography in class 12th.

Also following are the careers you can pursue after your class 12th with humanities stream:-

Humanities and Social Sciences

Sociology

Psychology

Mass Communication, Film and Journalism

Business and Law

Hotel Management and Tourism

Fashion Designing

To know more detailed information about career options after class 12th with humanities stream, you can visit the following link:-

https://school.careers360.com/articles/courses-after-12th-arts

I hope this information would be helpful for you.

All the best for your bright future ahead.