geologic timescale
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geologic timescale — n. chronological scale of the history of Earth used to measure the relative or definite age of any section of geologic time … English contemporary dictionary
Lunar geologic timescale — The lunar geologic timescale (or selenologic timescale) divides the history of Earth s moon into five generally recognized geologic periods: the Copernican, Eratosthenian, Imbrian (upper and lower), Nectarian, and Pre Nectarian. The boundaries of … Wikipedia
Geologic time scale — This clock representation shows some of the major units of geological time and definitive events of Earth history. The Hadean eon represents the time before fossil record of life on Earth; its upper boundary is now regarded as 4.0 Ga.[1] Other… … Wikipedia
geologic — adjective of, or relating to geology or a geologic timescale … Wiktionary
Geologic record — The layer cake like appearance of concordant strata laid down over hundreds of thousands of years … Wikipedia
timescale — noun Date: 1890 an arrangement of events used as a measure of the relative or absolute duration or antiquity of a period of history or geologic or cosmic time … New Collegiate Dictionary
geologic time scale — see http://www.geosociety.org/science/timescale/timescl.htm … Geography glossary
timescale — n. period of time allowed for something to be completed; arrangement relative to the time in which an event takes place (in history or in geologic or cosmic time) … English contemporary dictionary
New Zealand geologic time scale — While also using the international Geologic time scale, many nations especially those with isolated and therefore non standard prehistories use their own system of dividing geologic time into epochs and faunal stages. In New Zealand, these epochs … Wikipedia
Nuclear timescale — In astrophysics, the nuclear timescale is an estimate of the lifetime of a star based solely on its rate of fuel consumption. Along with the thermal and dynamical time scales, it is used to estimate the length of time a particular star will… … Wikipedia
