Effigy Mounds National Monument
geographical name
site containing prehistoric mounds on the Mississippi River northwest of Dubuque in northwestern Iowa
Cite this Entry
“Effigy Mounds National Monument.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Effigy%20Mounds%20National%20Monument. Accessed 27 Nov. 2025.
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