Hello Aspirant

Yes, you are eligible to pursue Master's of science in geology after doing bachelor's of science in environmental science.

As the basic eligibility is to be graduated in the any field of science.

The students must have studied any subject related to science, so as you are a Bsc graduate, then you are eligible for pursuing Msc in geology.

You need to appear in the entrance exams too for getting admission as most of the Universities have their own entrance test also Eligibility criteria, so for that keep updated with the official website of the college you want to take admission.

To know more detailed information about coures related to geology and their eligibility, you can visit the following link:-

https://www.careers360.com/courses/geology-course

I hope this information would be helpful for you.

All the best for your bright future ahead.