Hey as per my idea preparing for UPSC exam is good choice and here I am giving you details of Geologists Examination Syllabus

Nationality
Candidate should be Indian

Age limit
Candidate should be between 21 years to 32 years

Age relaxation
5 years in case of SC/ST candidates
3 years for OBC candidates.

Qualification
Candidate should have master degree from recognised university

Syllabus
Geomorphology and Remote Sensing
Structural Geology
Geodynamics
Stratigraphy
Palaeontology
Mineralogy and Geochemistry & Isotope Geology
Igneous Petrology
Metamorphic Petrology & Processes
Sedimentology
Environmental Geology and Natural Hazards
Selection criteria
Written test
Interview