Vivianite, a rare blue phosphate mineral, seen in eroding bluffs along the Porcupine River in Arctic National Wildlife Refuge. Vivianite develops in iron-rich sedimentary deposits containing organic material like bones and decaying wood.
You are exiting the U.S. Fish and Wildlife Service website
You are being directed to
We do not guarantee that the websites we link to comply with Section 508 (Accessibility Requirements) of the Rehabilitation Act. Links also do not constitute endorsement, recommendation, or favoring by the U.S. Fish and Wildlife Service.