Missouri became a state in 1821 and since then, various symbols have been selected to identify our unique geology and history. 

State Dinosaur
Hypsibema missouriensis bones found in Missouri reside in the Smithsonian Institution
State Fossil
The Crinoid is Missouri’s most common fossil
State Mineral
Galena is the primary ore of lead
State Rock
Found only in Missouri, the colorful Mozarkite is a special variety of chert