https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!966004~!0#focus ...
(2ft wide & exposed for 8ft) within V20 rock. Initially interpretted as a diek, it is cut by qtz-fld vein with 4" of both contacts w/ diorite -> f.g. rock deformed plasticalk at edges. Consistent with ...
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