Hello,

It's not necessary for mathematics in geology honours. Geology is study of solid earth, rock composed, processing etc. So the main subject always mathematics, physics and chemistry but some PCB like physics chemistry and biology students also join geology honours. But the main problem without mathematics you can't allow some examinations like IIT jam, ISM etc. But you can eligible for GATE examination. So yes mathematics is not necessary but if present then opportunity become more. In India so many colleges are offered for this course I'll provide you a link below you can check it for more details about the college

https://university.careers360.com/colleges/list-of-bsc-in-geology-degree-colleges-in-india

All the best.