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Brecciated limestone. Death Valley, CA.
Brecciated limestone in Titus Canyon (not in a fault zone). Death Valley National Park, California. (SrF-65)
Download Imagepseudotachylite injection into gneiss
pseudotachylite injection into gneiss, Arizona.
(SrF-61)
Brecciated pegmatite
Brecciated pegmatite. Black matrix contains iron oxide. (SrF-62)
Download ImageCalcite fibers on fault surface (vertical).
Growth direction indicates the block in the photo moved to the right and slightly upward. (SrF-59).
Download ImageFault gouge
Color-banded fault gouge along Badwater Turtleback fault, Death Valley, California. Main fault surface is in upper right (SrF-58)
Download Imagecalcite-filled pull-apart (vertical)
Fibrous calcite in rhombic “pull-apart” structure between the two small strike-slip faults in siltstone. (SrF-60)
Download ImageUnloading joints in granitic rock (vertical).
Sheeting joints in granodiorite cause exfoliation, southern BC, Canada. (SrF-53)
Download ImageFault gouge along fault surface.
Low-angle fault in limestone. Movement was top-right (SrF-57)
Download Imageslickenlines on fault surface, Colorado
near-vertical slickenlines indicate dip-slip movement. Rocky Mountain National Park, Colorado (SrF-55).
Download ImageHiker in open joint, Utah (vertical)
Hiker walking through open joint in sandstone. Note conchoidal fracture on joint surface. (SrF-54)
Download ImageArray of small left-lateral faults in siltstone
near Lillooet, British Columbia, Canada (SrF-40)
Download ImageFracture tips in sandstone.
Fibrous calcite filling tips of extension fractures in sandstone.Fibers are perpendicular to fracture walls, indicating that fractures formed as Mode 1, opening fractures. (SrF-47)
Download ImageFibrous quartz veins in sandstone.
Fibers are perpendicular to fracture walls, indicating that fractures formed as Mode 1, opening fractures (SrF-46)
Download ImageVertical joints in sandstone, SE Utah.
Aerial view of vertical joints in sandstone, Arches National Park, Utah. Note how weathering and erosion concentrated along the joints. (SrF-44)
Download ImageVertical joints in sandstone, SE Utah.
Sandstone is Jurassic Navajo Sandstone, Arches National Park, Utah. (SrF-45)
Download Image
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