Fossils
Notable Fossils Discovered in Ohio.
​Johnstown Mastodon
Online Articles:
Havenner, Nathan. “The Discovery of the Johnstown Mastodon.” Ohio Magazine, July / Aug. 2023, https://www.ohiomagazine.com/ohio-life/article/the-discovery-of-the-johnstown-mastodon.
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Johnstown Historical Society. “The Johnstown Mastodon.” Johnstown Historical Society, https://www.johnstownohiohistoricalsociety.com/johnstown-mastodon.html.
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City of Johnstown. “Mastodon Preserve.” City of Johnstown, Ohio, https://johnstownohio.org/mastodon-preserve.
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​Megalonyx Fossil
Online Articles:
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Orton Geological Museum. “The Megalonyx Project: Science Education Through Restudy of a Landmark Scientific Discovery.” Orton Geological Museum – The Ohio State University, https://ortonmuseum.osu.edu/collections-research/megalonyx-project.
Babcock, Loren E. “Dr Loren Babcock | Untangling the History of Jefferson’s Giant Ground Sloth.” Scientia. Global, 24 Apr. 2025, https://www.scientia.global/dr-loren-babcock-untangling-the-history-of-jeffersons-giant-ground-sloth/.
“A Gentle Giant: Thomas Jefferson’s Ground Sloth.” Open Access Government, 19 Sept. 2025, https://www.openaccessgovernment.org/article/a-gentle-giant-thomas-jeffersons-ground-sloth/198484/.
Babcock, Loren E. “Nomenclatural History of Megalonyx Jefferson, 1799 (Mammalia, Xenarthra, Pilosa, Megalonychidae).” ZooKeys, vol. 1195, 2024, pp. 297-308, https://zookeys.pensoft.net/article/117999/. zookeys.pensoft.net.
Ohio History Connection. “It’s the Youngest Old Sloth Known!” OhioHistory.org, 21 Jan. 2015, https://www.ohiohistory.org/its-the-youngest-old-sloth-known/.
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​Dunkleosteus Fossil
Online Articles:
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Raponi, Richard. "Dunkleosteus." Cleveland Historical, https://clevelandhistorical.org/items/show/728.
"‘Chunky dunk?’ Cleveland’s prehistoric sea monster may have been shorter, stouter, than once believed." The Daily, Case Western Reserve University, 9 Mar. 2023, https://thedaily.case.edu/chunky-dunk-clevelands-prehistoric-sea-monster-may-have-been-shorter-stouter-than-once-believed/.
"Dunkleosteus Terrelli: Terror of the Devonian Period." Ohio Department of Natural Resources, ohiodnr.gov/discover-and-learn/safety-conservation/about-ODNR/geologic-survey/educational-resources/dunkleosteus-fossil.
Video:
The Dunkleosteus Debate Is a Fish Story 360 Million Years in the Making. YouTube, uploaded by WKYC Channel 3, 2.8 years ago, https://www.youtube.com/watch?v=U01bpmBDoaI.
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Historical Marker:
"12-47 Jay Terrell and his “Terrible Fish”." Remarkable Ohio, https://remarkableohio.org/marker/12-47-jay-terrell-and-his-terrible-fish/.
The Burning Tree Mastodon
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Online Articles:
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Dyer, David, and Emily George. “How to Find a Mastodon – The Story of the Williams Mastodon.” Ohio History Connection, 22 Apr. 2022, https://www.ohiohistory.org/how-to-find-a-mastodon-the-story-of-the-williams-mastodon/.
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“World’s Most-Complete Mastodon Debuts in Science Center.” Hanover College News, Hanover College, 2021, https://www.hanover.edu/about/news/2021/mastodon-installed-science-center/.
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Videos:
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Burning Tree Mastodon. YouTube, uploaded by Remarkable Ohio (feat. Brad Lepper), 19 Mar. 2025, https://www.youtube.com/watch?v=GAlwhIkL9jE.
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Burning Tree Mastodon. YouTube, uploaded by Columbus Neighborhoods, (? date published), https://www.youtube.com/watch?v=LQQWA-JIjak.
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