This table is arranged with the most recent geologic periods at the top, and the oldest at the bottom. The height of each table entry does not correspond to the duration of each subdivision …

Dec 1, 2025 · Geologic time, the extensive interval of time occupied by the geologic history of Earth. Formal geologic time begins with the Archean Eon (4.0 billion to 2.5 billion years ago) …

Oct 5, 2021 · Geologic time scale showing the geologic eons, eras, periods, epochs, and associated dates in millions of years ago (MYA).

Jan 11, 2025 · Learn about the geologic time scale or GTS. Discover what it is, how it is divided, and the characteristics of each time period.

May 13, 2025 · The geologic time scale is a system used by scientists to describe Earth's history in terms of major geological or paleontological events (such as the formation of a new rock …

Jul 27, 2025 · Earth’s eight geological eras tell the story of chaos and order, destruction and creation, extinction and rebirth. They are not just divisions of time, but testaments to the …

This page details the geological time scale, which categorizes Earth's 4.6 billion-year history into Eons, Eras, Periods, and Epochs. The International Commission on Stratigraphy maintains …

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. …

Few discussions in geology can occur without reference to geologic time. Geologic time is usually discussed in two forms: Relative time - named subdivisions of the Earth's geology in a specific …

Effective communication in the geosciences requires consistent uses of stratigraphic nomenclature, especially divisions of geologic time. A geologic time scale is composed of …