What's the difference between lithology and petrology?
Lithology
Definition:
(n.) The science which treats of rocks, as regards their mineral constitution and classification, and their mode of occurrence in nature.
(n.) A treatise on stones found in the body.
Example Sentences:
(1) The general lithology of terrains may be distinguished by their radioelement ratios, relative abundances, and total gamma radioactivities.
(2) Lung cancer mortality rates for the period '69-'78, in population 35-74 years old, have been calculated for two areas with different lithological features and radioactivity levels.
Petrology
Definition:
(n.) The department of science which is concerned with the mineralogical and chemical composition of rocks, and with their classification: lithology.