geologic timescale

geologic timescale
A chronological scale of the earths history used to measure the relative or absolute age of any part of geologic time.

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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 …   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

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