Wrucke, C.T., 1989, The Middle Proterozoic Apache Group, Troy Quartzite, and associated diabase of Arizona, in Jenney, J.P., and Reynolds, S.J., eds., Geologic evolution of Arizona: Arizona Geological Society Digest 17, p. 239-258.
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Stratigraphy, Sedimentary, Sedimentary Petrology, Correlation, Geochemical Survey, Paleoenvironment, Paleogeography, Diabase, Volcanic, Uranium, Asbestos, Iron, Mineralization, Metamorphic Petrology, [Sierra Ancha diabase][Apache diabase][Mescal diabase] - Middle Proterozoic, [Pioneer Fm][Pioneer Quartzite][Pioneer Shale][Pioneer argillite] - Apache Group - Middle Proterozoic, Scanlan Conglomerate Mbr, [Dripping Spring Quartzite][Dripping Spring Fm], Barnes Conglomerate Mbr, [Mescal Limestone][Mescal Fm], Troy Quartzite - Middle Proterozoic, (Chediski white sandstone mbr)Chediski Sandstone Mbr, Unkar Group - Grand Canyon Supergroup, [Rama diabase][Rama sills](Rama Fm)(Grand Canyon sills)[Unkar sills],