Manganese Mesa 



pT 



Artillery PH. 





B ooo' 



■3ea /eve/ 



One Mile 



Rawhide fit hor/>o 



Artillery fits. 



fhrujt 



looo' 



ARTILLERY MT5. MANGANESE REGION 



Chico 5hunie Hills Copper Canyon 



dT/?/ /CO Mo unto in 

 Tb 



Tdc 



jooo' 



Tsa 



J<?o /eve/ 



Tvb 



New 



Corn el /a 

 Mine 



Tern 



Tov 



AJO MINING DISTRICT 



r jooo 



-5<?c /eve/ 



j iV/'/eJ 



Fig. 27.9. Cross sections of the Artillery Mountains, after Lasky and Webber, 1944, and the 

 Little Ajo Mountains, after Gilluly, 1937a. 



Formations in the Artillery Mts.; pT, Paleozoic Is., sh., and qutz., and Precambrian granite, 

 gneiss, and schist; Tec, lower Eocene (?) congl., ss., and sh.; Tmv, Miocene (?) volcanic rocks; 

 Tpf, lower Pliocene (?) alluvial fan and playa deposits containing manganiferous beds; Tb, lower 

 Pliocene (?) basalt; Tpc, upper Pliocene (?) basalt; Qb, Early Pleistocene (?) basalt. 



Formations in the Ajo mining district; p€g, Cardigan gneiss; Msc, Chico Shunie quartz mon- 

 zonite; Kcv, Concentrator volcanics; Ted, Cornelia quartz monzonite, Tlf, early Tertiary Loco- 

 motive fanglomerate; Tav, middle (?) Tertiary Ajo volcanics; Tsa, middle (?) Tertiary Sneed 

 andesite; Tdc, middle (?) Tertiary Daniels conglomerate; Tel, Pliocene (?) Childs latite; Tvb, 

 Pliocene andesite breccia; Tb, Pliocene andesite flows; Tbi, intrusive basalt. 



