Data Series 297
U.S. GEOLOGICAL SURVEY
Data Series 297
Figure 10. Example of subsurface fracture characteristics in vertical core hole MH-2 in floor of emplacement drift U-12n.10 at 303.77 feet from portal opening, Nye County, Nevada. Core sample shows slickensides and black staining on fracture surfaces at 79 feet. Photograph taken by Jerry Magner, U.S. Geological Survey.