Arizona Department of Mines and Mineral Resources
titaniferous magnetite is intermingled and stratified with tan to buff colored sand, gravel, and silt derived from earlier erosion. The heavy magnetite grains range in size from fine to coarse sand and are generally associated with il menite, sphene, apatite, zircon, monazite, and lighter minerals such as quartz, mica, and feldspar. Various localities within the alluvial plain contain ...