More than half of the iron we mine today comes from banded iron formations. But where did banded iron formations come from? Special thanks to Dr. Bill Cannon from the USGS for helping me understand this topic!

✨ 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.alexisdahl.com/support.'>http://www.alexisdahl.com/support.

Find Me Elsewhere:
• Find stickers, hats, and other merchandise related to these videos: http://www.alexisdahl.com/store'>http://www.alexisdahl.com/store
• Want to get semimonthly emails about my latest videos and other happenings? You can sign up here: http://www.alexisdahl.com/newsletter'>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