For information on viewing *.CUT and *.SEM files, refer to 

Mossotti, V.G., Eldeeb, A.R., and Oscarson, Robert, 1998, 
     MORPH-I (Ver. 1.0), a software package for the 
     analysis of scanning electron micrograph (binary 
     formatted) images for the assessment of the fractal 
     dimension of enclosed pore surfaces: U.S. Geological 
     Survey Open-File Report 98-248, 74 p. 
     [URL http://geopubs.wr.usgs.gov/open-file/of98-248]