geology vs paleogeology

geology and paleogeology both are nouns.

Word	Noun	Adjective	Verb	Adverb
geology	Yes	No	No	No
paleogeology	Yes	No	No	No

As nouns, paleogeology is a hyponym of geology; that is, paleogeology is a word with a more specific, narrower meaning than geology:

geology: a science that deals with the history of the earth as recorded in rocks
paleogeology: the study of geologic features once at the surface of the earth but now buried beneath rocks

geology (noun)	paleogeology (noun)
a science that deals with the history of the earth as recorded in rocks	the study of geologic features once at the surface of the earth but now buried beneath rocks