Image: The Trackway Protichnites
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Description: Protichnites; a trackway; Middle-Late Cambrian; Elk Mound Group; Marathon County, Wisconsin; collected by Joshua Gass; photograph originally published in Kenneth Gass, 2015. Solving the Mystery of the First Animals on Land: The Fossils of Blackberry Hill. Siri Scientific Press, Manchester, UK.
Title: The Trackway Protichnites
Credit: Own work
Author: Kennethcgass
Usage Terms: Creative Commons Attribution-Share Alike 4.0
License: CC BY-SA 4.0
License Link: https://creativecommons.org/licenses/by-sa/4.0
Attribution Required?: Yes
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