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. The Cenozoic, …

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 geological history.

The standard international units of the geologic time scale are published by the International Commission on Stratigraphy on the International Chronostratigraphic Chart.

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. You can …

Geologic Time Scale: Divisions of Geologic Time approved by the U.S. Geological Survey Geologic Names Committee, 2010. The chart shows major chronostratigraphic and geochronologic units.

The left half shows a timeline of Earth’s geologic history which is split into Eons, Eras, Periods, and Epochs and how many millions of years ago (MYA) these occurred.

What is the Geologic Time Scale? Standard 8-2.4: Recognize the relationship among the units—era, epoch, and period—into which the geologic time scale is divided.

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 past charts available …

On the back of this sheet is a chart showing the geologic eras, systems, and series; the oldest is at the bottom. On the chart, each dot, number, or letter represents 1 million years.

At GSA you'll find the resources, confidence, and connections you need to reach fulfilling new heights in your geoscience career.