Brother,
I am little confused. The syllabus, to me, doesn't seem that hefty and difficult, as i have opted Geography and studied it well. But the opinion of the teachers at PU and of erudite like you is baffling me. I am not a geologist, to make it clear, but have studied geology as a subject in engineering, you may consider me 'a beginner'.

Can you please share the marks potential of the subject, if you or your friends have happened to attempt this subject?
How much time do you think this subject would take for a beginner to have substantial grip, for average marks?
Is this subject safe enough to obtain average scores of 40 to 60?

Your help in this regard will be highly appreciated.
Thanks and regards.