The 2023 annual Indiana Geological and Water Survey calendar, Giants Underfoot, is now available. The American mastodon (Mammut americanum) was one of the most abundant Ice Age mammals in what is now the Midwest. Mastodon fossils have been found in every county in Indiana. Only in 2022, though, did the mastodon become Indiana's state fossil–approximately 10,000 years after mastodons went extinct. The 21- by 33-inch calendar is printed in full color on heavy poster paper and is shipped rolled in a sturdy cardboard tube. On special discount for $0.99 through January 31!
Indiana Geological and Water Survey, 2022, 2023 IGWS calendar--Giants underfoot.
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Indiana Geological and Water Survey
1001 E. 10th St.
Bloomington, IN 47405
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