Crustal growth in southern Arizona: U-Pb geochronologic and Sm-Nd isotopic evidence for addition of the Paleoproterozoic Cochise block to the Mazatzal Province

The article describes the formation of the North American crust as documented by Arizona's Cochise block, focusing on the rapid addition of evolved, juvenile metavolcanic arc rocks and the derivation of metasedimentary quartz-rich rocks. Documentation includes volcanic activity and delineation of suture zones and subduction complexes.