Hello Alok,
Geology department of St. Xavier college, Mumbai is good. It has all the facilities like good faculty, required field work which is mandatory in geology. Apart from that it is one of the best college in terms of academics and infrastructure.
While studying there you can come to know more about it.
And the answer to the other part of your question it is possible that you might get admission. It totally depends upon the admission criteria and cut off of that particular year. For more detailed information you can visit the official site of st. Xavier college.

I hope this information helps you.
All the best !!

Dear aspirant,
Geology department in St Xavier's university Mumbai is good. The department provides you more practical knowledge than theoretical. This university is one of the finest university to spend your ug in our country. Yes ,you can get your admission with the eligibilites you have.
Thank you

The geology department at St Xavier college is good to study. You have eligible for that with 90% PCB ,also you have to give an entrance exam which was held on 2 June ,2019 this year.
Best of luck