File:YELL 165705 Agnostid trilobite (30513612801).jpg

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YELL-165705: A small, Agnostid trilobite (YELL-165705) head is shown here. How did these little arthropods survive 500 million years ago? From their lack of eyes and poorly suited swimming body, scientists infer that they were most likely pelagic and floated around the open ocean. This particular Agnostid trilobite is over 500 million years old and was collected from the Wolsey Shale from Mount Holmes in Yellowstone National Park. Scientists use clues from the trilobites' physical features and the type of rock they were fossilized in, to infer the paleo-environment of the area, which at this time would have been described as a moderate to deep-water environment.

Collecting any natural resources, including rocks and fossils, is illegal in Yellowstone. Photo by Megan Norr; March 2016; Catalog #20798d;

Original #USNM_165705
Date
Source YELL_165705 Agnostid trilobite
Author Yellowstone National Park

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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.


This image was originally posted to Flickr by YellowstoneNPS at https://flickr.com/photos/80223459@N05/30513612801. It was reviewed on 16 March 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark.

16 March 2020

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Date/TimeThumbnailDimensionsUserComment
current01:06, 15 March 2020Thumbnail for version as of 01:06, 15 March 20202,995 × 2,000 (3.08 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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