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Wisconsin's State Fossil, Mineral and Rock


State Fossil: Trilobite (Calymene celebra)

Flourishing in the warm, shallow salt waters of the prehistoric seas that periodically covered Wisconsin territory hundreds of millions of years ago, this extinct marine arthropod crawled its way into the state record in 1985 as the state fossil. The trilobite had multiple sets of paired, jointed legs.

State Mineral: Galena (PbS)

The proposal to make galena (lead sulfide) the state mineral was introduced by the Kenosha Gem and Mineral Society to promote geologic awareness. Galena was chosen for its abundance, uniqueness, economic value, historical significance, and native nature. This designation was officially bestowed upon the mineral in 1971.

State Rock: Red Granite

The Wisconsin state rock is red granite, an igneous rock composed of quartz (white-light gray mineral) and feldspar (pinkish mineral). It is mined in several sections of the state and was selected as the state rock in 1971 for its economic importance.

State Soil: Antigo Silt Loam (Typic glossoboralf)

Created during the last great glaciers, the level, silty soil was chosen to represent the more than 500 major soil types found in Wisconsin.

For more WI state symbols, visit Link to UW-Madison homepage