Page "Seal of Wisconsin" Paragraph 15

The state seal emphasizes mining and shipping.

At the time of Wisconsin's founding in 1848 the mining of lead and iron was a major industry that ended by the early 20th century.

According to the Wisconsin Geological and Natural History Survey " Significant remaining tonnages of lower grade ore have been identified by magnetic surveys and limited core drilling in District in Iron and Ashland Counties.

" The state was also a particularly important navigational link from the Great Lakes to the Mississippi River via Wisconsin rivers.

This was gradually phased out with the advent of railways in the mid-to late-19th century.