U.S. GEOLOGICAL SURVEY. 



MONOGRAPH XXV. PL. XXXVII. 



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^^ ^ ^-'^^^^-^^-^- ^T'^v. i.l^ ^r^,^ 



M.\l' SIHWINC. Till-: DISTlUBmON .\ND DEPTHS OF M«'ESL\N WKLI^S IX THI'; RI'X) lilM-)! \AU.i:i-. 



Scale, abouL -V2 miles to an ii\ch. 



Arl^'Siaii Wells wlioUy in the Drifl r'.''-l Aitesiau Wells and oUier BoriiiSs i-enchiiig' to the Bed Rorks ja°_j^ 



OfpfJus aif noted in teet below Uie ^mvfitce. For Ihcir i^ationship to tJic st^ level, see PJate X. 



