In Marquette, Michigan, there's a park with some bizarre, pillowy-looking black rocks. To understand where they came from, I found an expert, who took me on an adventure to (literally) stand on the Earth's surface as it was a billion years ago. The thanks section: 🎉 Special thanks to Dr. Bill Cannon from the US Geological Survey for all his help, and for being such a joy to work with! 🎉 Thanks to Vlogbrothers for sponsoring this video! Hank and John, thanks for starting me on such a lovely videomaking journey once upon a time. ✨ Want to support my work? Well, hey, thank you so much. You can learn more about how to keep this thing going at http://www.patreon.com/alexisdahl. ☕ Find this series valuable, but Patreon isn't for you? You can also help keep this thing going at http://www.buymeacoffee.com/alexisdahl. Find Me Elsewhere: • Find stickers, hats, and other merchandise related to these videos: http://www.alexisdahl.com/store • Want to get semi-monthly 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: http://www.instagram.com/alexis.writes Additional research sources and image credits: Image Credits: https://commons.wikimedia.org/wiki/File:Olivineinschluss_in_Lava,_S%C3%BCdwest-Lanzarote_II.jpg https://commons.wikimedia.org/wiki/File:Gemperidot.JPG https://commons.wikimedia.org/wiki/File:Serpentine_2.jpg https://www.nasa.gov/mission_pages/hubble/science/xdf.html Additional sources: https://www.travelmarquette.com/things-to-do/attractions/presque-isle-park/ https://scholarworks.wmich.edu/cgi/viewcontent.cgi?article=1714&context=masters_theses https://pubs.geoscienceworld.org/gsa/gsabulletin/article-abstract/86/3/371/201822/Chemistry-and-Mineralogy-of-Precambrian-Paleosols https://stsmith.faculty.anth.ucsb.edu/classes/anth3/courseware/Chronology/11_Paleomag_Archaeomag.html https://www2.tulane.edu/~sanelson/eens1110/pltect.htm https://www.britannica.com/science/Curie-point https://cires1.colorado.edu/people/jones.craig/Teaching/GEOL5690/PaleomagNotes.pdf #UpperPeninsula #geology