Summit of Harney Peak, Black Hills, South Dakota
Go to slide:
1: Plutonic Rocks
2: Granite
3: Anorthosite
4: Pegmatite containing tourmaline
5: Thin section of porphyritic rock
6: Needles, Black Hills, South Dakota
7: Needles, Black Hills, South Dakota
8: Climber on granite at Joshua Tree National Park
9: Stone Mountain, North Carolina
10: Cliffs at Bon Echo Lake, Ontario
11: Yosemite Valley, California
12: Exfoliation crack in granite
13: Granite on peak in Sierras
14: Rock climbers at Arch Rock, Yosemite National Park
15: Climbers on El Capitan, Yosemite National Park
16: Granites in Joshua Tree National Park
17: Summit of Harney Peak, Black Hills, South Dakota
18: Zoned feldspar in thin section
19: Hornblende in thin section
