Compilation of isotopic ages within the Needles 1o by 2o quadrangle, California and Arizona

Geochronology, Aubrey turkey track porphyry - Miocene, basalt basaltic andesite and andesite of The Mesa (Buckskin Mountains), Black Mtns. tuff (MO), Buckskin Mtns. phyllite - Triassic(?) or Jurassic(?), Buckskin Mtns. rhyolite, Cienega District granite - Mesozoic(?) or Proterozoic(?), (Cross Roads andesite)andesite of Osborne Wash - Miocene,