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File:The divisions of the geologic time scale are organized stratigraphically, with the oldest divisions at the bottom and the (1fe00ccc-04ce-4cc9-9cdf-8b105d979f02).jpg

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Summary

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English: Geologic Time Scale
Photographer
English: National Park Service; graphic using dates from the International Commission on Stratigraphy (http://www.stratigraphy.org/; index.php/ics-chart-timescale; accessed 7 May 2015).
Title
English: Geologic Time Scale
Description
English:

The time scale identifies eons, eras, periods, and epochs of geologic time ranging from the formation of the earth (4.6 billion years ago) to the current Holocene Epoch (beginning 11,700 years ago) of the Quaternary Period (beginning 2.6 million years ago) in the Cenozoic Era (beginning 66 million years ago).

The divisions of the geologic time scale are organized stratigraphically, with the oldest divisions at the bottom and the youngest at the top. GRI map abbreviations for each time division are in parentheses. Boundary ages are millions of years ago (MYA). Units mapped in the preserve are quite young and range from the Miocene through the Pleistocene and Holocene (all labelled in green).
Depicted place
English: Big Thicket National Preserve, Texas
Accession number
1fe00ccc-04ce-4cc9-9cdf-8b105d979f02
Source
English: NPGallery
Permission
(Reusing this file)
Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.
NPS Unit Code
InfoField
BITH

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