92 RECONNAISSANCE OP PART OF WESTERN ARIZONA. 
A-14. Olivine diabase from the eastern edge of Black Mesa, at meadow spring j n Gold 
Roads Pass; dike cutting the rhyolite. 
A-22. Olivine basalt from Mud Spring- at eastern edge of Black Mesa. 
A-23. Olivine basalt from north end of Cerbat Mountains. 
A-24. Olivine basalt from a sheet resting upon granite east of Cerbat Mountains. 
A-25. Olivine basalt from a sheet resting above A-24. 
A-45. Basalt from a sheet 800 feet thick covering the Temple Bar conglomerate in 
Williams Canyon. 
A-40. Olivine basalt near Planet, in Williams Canyon. 
