IPA: /ˌfoʊtəʊdʒiˈɒlədʒɪk/
KK: /fōtōjēəˈläjik/
Relating to the study of geological features using photographs, especially aerial images.
The photogeologic analysis revealed new insights into the landscape's formation.
Photogeologic → It is formed from "photo-" (from Greek "phōs", meaning light) and "geologic" (from Greek "geōlogia", meaning study of the earth). The word refers to the study of the earth using light, particularly through photographs.
Think of 'light' ('photo-') being used to study the 'earth' ('geologic') — that's why photogeologic relates to examining the earth through light or photographs.