a science that deals with the origin, structure, composition, and history of the earth, esp as recorded in rocks
the geological features of an area
geologic /jee·əʹlojik/ adj
geological /jee·əʹlojikl/ adj
geologically /jee·əʹlojikli/ adv
geologist noun
[Latin geologia, from Greek gē earth + -logia -logy]