Geologic time scale - Wikipedia
The time scale has been developed through the study of rock layers and the observation of their relationships and identifying features such as lithologies, paleomagnetic properties, and fossils.
Currently, the Anthropocene has an informal designation, with a proposed age span extending from the present to a beginning point between ca. 15,000 yr B.P. and as recent as 1960 CE. …
International Commission on Stratigraphy
This page contains the latest version of the International Chronostratigraphic Chart (v2024-12) which visually presents the time periods and hierarchy of stratigraphic names of Earth's …
Geologic Time Scale - Geology (U.S. National Park Service)
Oct 5, 2021 · Geologic time scale showing the geologic eons, eras, periods, epochs, and associated dates in millions of years ago (MYA).
Geological timechart - British Geological Survey
The BGS geological timechart provides colourful reference material for use in schools, colleges and at home, setting out the geological timescale and geochronological terms we use at BGS. …
Geologic time | Periods, Time Scale, & Facts | Britannica
Dec 1, 2025 · One of the most widely used standard charts showing the relationships between the various intervals of geologic time is the International Chronostratigraphic Chart, which is …
Chart showing updated divisions of geologic time, modified from U.S. Geological Survey Geologic Names Committee (2018).