The IGWS bookstore has moved.
Item Number: CAL2023

The 2023 annual Indiana Geological and Water Survey calendar, Giants Underfoot, is now available for in-store purchase. 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. NOTE: Available for in-store purchase only at this time.

Indiana Geological and Water Survey, 2022, 2023 IGWS calendar--Giants underfoot.

Can't find what you're looking for? Feel free to contact us directly:

Indiana Geological and Water Survey
1001 E. 10th St.
Bloomington, IN 47405
812-855-7636 (phone)
812-855-2862 (fax)

IGS Return Policy

  • Original sales receipt required.
  • Returns accepted within 30 days of purchase date.
  • Refund will be issued by the same method of payment as purchased.
  • Products must be returned in the same new condition as purchased.
  • Refunds on custom orders and digital products are NOT allowed.
  • Customers are responsible for paying shipping costs to return products.

Updated 8/19/2020