Hello aspirant,

I am glad to learn about your interest.
As per your question i do learn about your confused state of mind.

Well geography and geology are very different subjects.

Geography is all about the world, atmosphere, zones and so on.
Whereas, geology is the study of fossils, rocks etc.

I would suggest you to choose something you take interest in.

However, if both equally interest you then i would advise you to opt for geology.

All the best.