Under Detroit, There’s a Huge, Active Mine (Here's How It Works)

For more than 100 years, the Detroit salt mine has been pulling millions of tons of rock salt out of the ground. But considering Michigan is surrounded by fresh water... where did all that salt come from? ✨ Want to support my work? Well, hey, thank you so much. You can learn more about how to keep this thing going at https://www.alexisdahl.com/support. Special thanks to George for providing the drone footage for this project! You can find his work at https://www.ggallagher.com/. Find Me Elsewhere: • Find stickers, hats, and other merchandise related to these videos: http://www.alexisdahl.com/store • Want to get e-mails about my latest videos and other happenings? You can sign up here: http://www.alexisdahl.com/newsletter • Want to work together or learn more about my work? Contact me at http://www.alexisdahl.com/ • On Instagram, I upload nature photos, plus odds and ends:   / alexis.writes   Key sources I used to research this video: The info pamphlet I show toward the start http://detroitsalt.com/ https://pubs.geoscienceworld.org/gsa/... https://project.geo.msu.edu/geogmich/... https://www.loc.gov/item/2016816919/ https://digitalcollections.detroitpub... https://pubs.usgs.gov/periodicals/mcs... https://home.wgnhs.wisc.edu/wisconsin... https://project.geo.msu.edu/geogmich/... https://www.michigan.gov/-/media/Proj... https://www.osha.gov/hydrogen-sulfide/ https://www.mlive.com/news/detroit/20... https://www.nationalgeographic.com/sc... http://maps-detroit.com/detroit-salt-... https://onemine.org/documents/detroit... https://www.clickondetroit.com/featur... https://books.google.com/books?hl=en&... https://project.geo.msu.edu/geogmich/... https://deepblue.lib.umich.edu/bitstr... Image credit: https://commons.wikimedia.org/wiki/Fi...