The following five timelines show the geologic time scale to scale. 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.

Jan 17, 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) and continues to the present day. Modern geologic time scales also include the Hadean Eon (4.6 billion to 4.0 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).

Effective communication in the geosciences requires consistent uses of stratigraphic nomenclature, especially divisions of geologic time. A geologic time scale is composed of standard stratigraphic divisions based on rock sequences and …

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Our geologic time scale was constructed to visually show the duration of each time unit. This was done by making a linear time line on the left side of the time columns. Thicker units such as the Proterozoic were longer in duration than thinner units such as the Cenozoic.

Dec 6, 2023 · Understanding the divisions of time in the Geologic Time Scale is crucial for comprehending the history of our planet and the evolution of life on Earth. The Geologic Time Scale is divided into several large units of time, including eons, eras, periods, and epochs.

Subscribe to browse and print this timeline & all our premium timelines, starting at $24 a year. This timeline shows the Geologic Time Scale with major events. This is a complete, fully interactive timeline chart with 175 geological periods and over 300 events from the formation of the Earth to present day.

Jan 29, 2024 · Learn below about the ages of important events in the fossil record and Earth's history during different geologic time intervals. Associated maps show the distributions of rocks from each time interval at or just below Earth's surface.

These materials are provided to assist in understanding time relationships and how life on Earth changed through time. The dates shown were compiled from several available sources. Table 1 shows some important events in Earth history, presented in the order in which they occurred. The data are also shown on the scale of a calendar year.