UPPER RED BEDS OF THE BLACK HILLS 



367 



MAPOFTHEUPPERREDBEDSOFTHEBLACKHILLS 



SCALE BY N.H.DARTON AND &.B. RICHARDSON 



SECTION THROUGH HARNEV PEAK 



PoSTSpEARFISH5e01MENT£. SPEARriSHREOBEOS PRt-SF>EARFlSHSEOlMfNT5. CRYSTALLINE R OCKS. 



