Slide Number: BH250-91
Number of slides: 10
Rock Name: Granite from railroad track quary in Grantie Falls, Minnesota
Major minerals: Quartz, Orthoclase, Albite, Biotite, Hornblende
Minor minerals: Biotites (1, 2) show lots of pleochroic halo, Chlorite, Oxides
Photomircrographs:
