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Numerous studies on rocks of the Navajo volcanic field (NVF) have been conducted in the last fifty years, but there are still questions about the origin and evolution of NVF magmas. Electron microprobe and laser ablation ICP-MS analyses on apatite crystals from NVF rocks reveal distinct chemical differences and trends that further support the notion that these rocks were created from several different magma sources. Bulk-rock geochemical trends reveal...