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  2. Geologic time scale - Wikipedia

    en.wikipedia.org/wiki/Geologic_time_scale

    The geologic time scale is a way of representing deep time based on events that have occurred throughout Earth's history, a time span of about 4.54 ± 0.05 Ga (4.54 billion years). [3] It chronologically organises strata, and subsequently time, by observing fundamental changes in stratigraphy that correspond to major geological or ...

  3. List of time periods - Wikipedia

    en.wikipedia.org/wiki/List_of_time_periods

    On the geologic time scale, the Holocene epoch starts at the end of the last glacial period of the current ice age ... (1989–2019) Reiwa period (2019–present)

  4. Valanginian - Wikipedia

    en.wikipedia.org/wiki/Valanginian

    Time scale(s) used: ... December 2019 [2] In the geologic timescale, the Valanginian is an age or stage of the Early or Lower Cretaceous.

  5. Meghalayan - Wikipedia

    en.wikipedia.org/wiki/Meghalayan

    In respect of the Mawmluh Cave site being the "GSSP of the youngest unit of the geologic time scale associated with dramatic climate changes with implications on human civilisation" the International Union of Geological Sciences (IUGS) included the GSSP of the Meghalayan Stage in the Mawmluh Cave in its assemblage of 100 "geological heritage ...

  6. Geological history of Earth - Wikipedia

    en.wikipedia.org/wiki/Geological_history_of_Earth

    Geologic time shown in a diagram called a geological clock, showing the relative lengths of the eons of Earth's history and noting major events The geological history of the Earth follows the major geological events in Earth's past based on the geological time scale , a system of chronological measurement based on the study of the planet's rock ...

  7. List of Global Boundary Stratotype Sections and Points

    en.wikipedia.org/wiki/List_of_Global_Boundary...

    This is a list of Global Boundary Stratotype Sections and Points.Since 1977, Global Boundary Stratotype Sections and Points (abbreviated GSSPs) are internationally agreed upon reference points on stratigraphic sections of rock which define the lower boundaries of stages on the geologic time scale.

  8. Geologic timeline - Wikipedia

    en.wikipedia.org/wiki/Geologic_timeline

    The geologic time scale of Earth history. The historical development of the science of geology, ... This page was last edited on 28 December 2019, at 14:18 (UTC).

  9. Template:Timeline geological timescale - Wikipedia

    en.wikipedia.org/wiki/Template:Timeline...

    The first shows the entire time from the formation of the Earth to the present, but this gives little space for the most recent eon. The second timeline shows an expanded view of the most recent eon. In a similar way, the most recent era is expanded in the third timeline, the most recent period is expanded in the fourth timeline, and the most ...

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