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GEOLOGY  -  Note that the maps are "as is" with no attempt at this time to color units -- the sequence is:

(Youngest) Ellison [above the blue line]                                      

Homestake [between brown line and blue line]            

Poorman  [between mauve and brown line]                   

(Oldest) Yates Member of Poorman Fm  [mauve color]       

files are labeled as the distance below the surface (Yates Shaft collar)

100 200 300 400 500 600 700 800 900 1000
1100 1250 1400 1550 1700 1850 2150 2300 2450 2600
2750 2900 3050 3200 3350 3500 3650 3800 3950 4100
4250 4400 4550 4700 4850 5000 5150 5300 5450 5600
5750 5900 6200 6350 6500 6650 6800 6800(NL_FM) 6950 7100
7250 7400 7550 7700 7850 8000 2000