The International Atomic Energy Agency assigns the uranium deposits according to their geological settings to 15 main categories of deposit types, arranged according to their approximate economic significance [IAEA2004]: 1. Unconformity-related deposits 2. Sandstone deposits 3. Quartz-pebble conglomerate deposits 4. Vein deposits 5. Breccia complex deposits 6. Intrusive deposits 7. Phosphorite deposits 8. Collapse breccia pipe deposits 9. Volcanic deposits 10. Surficial deposits 11. Metasomatite deposits 12. Metamorphic deposits 13. Lignite 14. Black shale deposits 15. Other types of deposits Uranium and vanadium occurrences in the Henry Basin generally are restricted to fluvial sandstone beds of the Salt Wash member of the Morrison Formation in a north trending zone east and south of the Henry Mountains known as the Henry Mountains mineral belt. The Del Monte and Tony M mines as well as the large Bullfrog ore bodies are all located within this belt.