International Commission on Stratigraphy
International Chronostratigraphic Chart This page contains the latest version of the International Chronostratigraphic Chart (v2024-12) which visually presents the time periods and hierarchy …
The geologic community broadly recognizes the Anthropocene as a proposed new time interval of Earth history, partly coincident with the Holocene. Currently, the Anthropocene has an informal …
Geologic time scale - Wikipedia
The geologic time scale, proportionally represented as a log-spiral with some major events in Earth's history. A megaannus (Ma) represents one million (10 6) years. The geologic time …
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.
Geological Time Chart
This geologic time chart shows whats going on in a geologic time scale table in a way that is easy to read, understand and learn about the history of the earth.
Geologic Time Scale | U.S. Geological Survey - USGS.gov
The Geologic Time Scale above is a helpful reference to use along with the information provided below. The left half shows a timeline of Earth’s geologic history which is split into Eons, Eras, …
Geologic Time Scale - Major Divisions of Geologic Time Chart
Geologic Time Scale: Divisions of Geologic Time approved by the U.S. Geological Survey Geologic Names Committee, 2010. The chart shows major chronostratigraphic and …
Geologic time | Periods, Time Scale, & Facts | Britannica
Dec 1, 2025 · The geologic time scale is the “calendar” for events in Earth history. It subdivides all time into named units of abstract time called—in descending order of duration— eons, eras, …
Geologic Time Scale - Geology (U.S. National Park Service)
Oct 5, 2021 · Geologic Time Scale Humans subdivide time into useable units such as our calendar year, months, weeks, and days; geologists also subdivide time. They have created a …
Geologic TimeScale Foundation - Stratigraphic Information
Jun 29, 2024 · Ages of this chart are according to "Geologic Time Scale 2020" by Felix M. Gradstein, James G. Ogg, Mark D. Schmitz, and Gabi M. Ogg, (2020, Elsevier). Archive of …
Geologic Time Scale - Science Notes and Projects
Jan 11, 2025 · The Geologic Time Scale or Geological Time Scale (GTS) is a chronological framework that organizes Earth’s history into various units based on geological and …
The “Divisions of Geologic Time” time scale shows the formally named chronostratigraphic (position) and geochronologic (time) units (that is, the eonothems or eons; erathems or eras; …