About 500 million years ago, a shallow sea covered the area, laying down layers of sand and minerals that make up much of the sandstone bluffs now seen along the river.

citation

Wikipedia contributors. (2023, November 7). St. Croix River (Wisconsin–Minnesota). In Wikipedia, The Free Encyclopedia. Retrieved February 6, 2024, from https://en.wikipedia.org/w/index.php?title=St._Croix_River_(Wisconsin%E2%80%93Minnesota)&oldid=1183996131

Marie Antoinette (en.wikiquote.org) Marie Antoinette (November 2 1755 – October 16 1793) was Queen of France and Archduchess of Austria. She was the daughter of the Holy Roman Emperor Francis I and his wife Maria Theresa of Austria, the wife of Louis XVI, and the mother of Louis XVII. She was guillotined during the French Revolution. She was born Archduchess Maria Antonia Josepha Johanna of the Habsburg dynasty.

St. Croix River (Wisconsin–Minnesota) (Wikipedia) The St. Croix River (/ˈkrɔɪ/ KROY; French for ‘Holy Cross’), also known in Dakota as Hoġan Wanḳe Kin, is a tributary of the Mississippi River, about 169 mi (272 km) long, in the U.S. states of Wisconsin and Minnesota. The lower 125 mi (201 km) of the river form the border between Wisconsin and Minnesota. The river is a National Scenic Riverway under the protection of the National Park Service. A hydroelectric plant at the Saint Croix Falls Dam supplies power to the Minneapolis–Saint Paul metropolitan area.