Geological Time Scale
Geologic Time Scale
Million Years Before Present
recorded human history, rise and fall of civilization...
There are several different ways that Earth scientists consider time. Geologic time is generally thought of as the period of time that begins with the initial formative processes of Eart...
Geologic time describes the immense span of time—billions of years-revealed in the complex rock surface of the Earth. Geochronology is the science of finding out how old rocks and ...