As nouns the difference between patrology and petrology
is that patrology is the study of the lives and works (especially the writings) of the church fathers while petrology is (geology) the study of the origin, composition and structure of rock.
patrology
English
Noun
The study of the lives and works (especially the writings) of the Church Fathers
Related terms
* patrologist
petrology
English
Noun
(
wikipedia petrology)
(
-)
(geology) the study of the origin, composition and structure of rock
Related terms
* petrography
* petrologist