File:Graptolite colony in Polk Creek shale. Collected in 1961. Likely Late Ordovician (~445 Ma) as the Ordovician-Silurian boundary (44843e28-5406-4203-a9ff-9537279c47d7).jpg

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English: HOSP_4499_GraptoliteColony_UnknownDate
Photographer
English: National Park Service Picture – Courtesy of Hot Springs National Park Archives
Title
English: HOSP_4499_GraptoliteColony_UnknownDate
Description
English: Graptolite colony in Polk Creek shale. Collected in 1961. Likely Late Ordovician (~445 Ma) as the Ordovician-Silurian boundary is marked by a mass extinction event that eliminated most graptolite species.
Depicted place
English: Hot Springs National Park, Garland County, Arkansas
Date Taken on 9 December 2013
Accession number
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
HOSP
Album(s)
InfoField
English: Paleontology

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current10:03, 22 May 2021Thumbnail for version as of 10:03, 22 May 20211,000 × 665 (327 KB)BMacZeroBot (talk | contribs)Batch upload (Commons:Batch uploading/NPGallery)

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