US lawMontanaStatutesTitle 1Chapter 1Part 51-1-509Mont. Code Ann. § 1-1-5091-1-509 State fossilYear: 2026Length: 15 wordsOfficial source 1-1-509 . State fossil. The duck-billed dinosaur Maiasaura peeblesorum is the official Montana state fossil.PreviousMont. Code Ann. § 1-1-508NextMont. Code Ann. § 1-1-510