MINEBK00005

• County: Custer
• Volume: 10
• Document: Inspectr
• Suffix: A

GEOLOGY. ~• 3
it
'"'r.ere is u good ~eolo~ics1 survey o° ti_C district.
Structure cnd chcrecter o~ country roc.: is porpY.y-
ritio, ~r~nite end ar:desite.