geological phenomenon
- n a natural phenomenon involving the structure or composition of the earth
geography
- n study of the earth's surface; includes people's responses to topography and climate and soil and vegetation
geologic process
- n (geology) a natural process whereby geological features are modified
geologic time
- n the time of the physical formation and development of the earth (especially prior to human history)
geological dating
- n use of chemical analysis to estimate the age of geological specimens
geological era
- n a major division of geological time; an era is usually divided into two or more periods
geological fault
- n (geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other
geological formation
- n (geology) the geological features of the earth
geological horizon
- n a layer of rock with a particular composition (especially of fossils); for dating the stratum
geological period
- n a unit of geological time during which a system of rocks formed
geological process
- n (geology) a natural process whereby geological features are modified
geological time
- n the time of the physical formation and development of the earth (especially prior to human history)