Learn more. Originally, the sequential nature of defining periods was a relative one, originating from the superposition of corresponding stratigraphic sequences and the evidence derived from paleontological studies.

geology definition: 1. the study of the rocks and similar substances that make up the earth's surface: 2. the…. Define geological period. Period (geology) synonyms, Period (geology) pronunciation, Period (geology) translation, English dictionary definition of Period (geology). Period, in geology, the basic unit of the geologic time scale; during these spans of time specific systems of rocks were formed. Cherchez period et beaucoup d’autres mots dans le dictionnaire de définitions en anglais de Reverso.

Geologic time definition is - the long period of time occupied by the earth's geologic history. geological period synonyms, geological period pronunciation, geological period translation, English dictionary definition of geological period.