释义 |
geological time ThesaurusNoun | 1. | geological time - the time of the physical formation and development of the earth (especially prior to human history)geologic timetime - the continuum of experience in which events pass from the future through the present to the pasteon, aeon - the longest division of geological timegeological period, period - a unit of geological time during which a system of rocks formed; "ganoid fishes swarmed during the earlier geological periods"geological era, era - a major division of geological time; an era is usually divided into two or more periodsepoch - a unit of geological time that is a subdivision of a period and is itself divided into ages |
geological time
geological time the period beginning with the formation of the earth and ending in the present day. It is often tabulated beginning with the Cambrian period, since the majority of fossil forms date from then. Precambrian time began with the formation of the earth about 4,600 million years ago. Dating of rocks is usually carried out by the measurement of radioactive decay. The older the rock the less radioactive it is. Organic remains are dated by CARBON DATING. See Appendix A.geological time
Synonyms for geological timenoun the time of the physical formation and development of the earth (especially prior to human history)SynonymsRelated Words- time
- eon
- aeon
- geological period
- period
- geological era
- era
- epoch
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