By this term an argillaceous carbonate of lime is usually implied. Hence, marly clay: a clay containing carbonate of lime.

View pictures relating to mining at Wisconsin Historical Images.

Learn More

Dictionary of Wisconsin History

Explore more than 1,600 people, places and events in Wisconsin history.

[Source: "Glossary of Miners'&Mineral Terms" in St. John, John R. A True Description of the Lake Superior Country ... (New York, W. H. Graham, 1846).]