and U.S. Army
Earth Science Applications, National Training Center, Fort Irwin

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Table 2. Summary of evidence for Quaternary movement on selected faults

FAULTS	EVIDENCE OF FAULTING	AGE OF LAST FAULTING
Coyote Lake and related faults [site A]	Bedrock faulted against Qia alluvium; rotated bedrock fragments along fault plane with abundant gouge	Post-Qia, pre-Qya2 [180,000, >1000 yr B.P.]
north Noble Dome fault [site C]	Open fractures in alluvium and colluvial veneers along fault planes developed in granitic and metamorphic rocks	Modern Creep event [spring, 1993]
Old Stable [site E] and Rifle Range [site F] faults	Scarps as much as 4 m high developed on Qoa and Qia surfaces; conjugate carbonate cemented fractures in Qoa subparallel to main fault	Old Stable: Post-Qya3?, pre-Qya2 [8,000?, >1000 yr B.P.] Rifle Range: Post-Qia, pre Qya2[180,000, >1000 yr B.P.]
Garlic Spring fault [site G] and splays [site H]	Tilted Qia and Qoa section; carbonate cemented fault plane cutting Qia sediments; probable Quaternary fossil spring mounds aligned along fault splay	Main fault: Pre-Qia; [>20,000 yr B.P.] Splay: Post-Qia, pre-Qya2 [180,000, >1000 yr B.P.]
south strand of Bicycle Lake fault zone [site I]	Breccia and gouge zones cutting Qoa; conjugate carbonate-cemented fractures in Qoa deposits	Post-Qoa, pre-Qia [250,000, >20,000 yr B.P.]
Coyote Canyon fault [site J]	West part: Steep (30°) scarps 20 cm to 5 m high developed on Qya2, Qya3, Qia, and Qoa surfaces; fault plane exposures showing long axes of alluvial clasts rotated parallel to fault plane; presence of conjugate carbonate-cemented fractures in adjacent alluvial units East part: Cuts Qia; overlapped by Qya3	West: Youngest scarps are post-Qya2, pre-Qya1 [1,000, >100 yr B.P.] East: Post-Qia, pre-Qya3 [180,000, >1000 yr B.P.]
north-striking fault west of Painted Rock [site K]	Scarps 10 m to 4 m high face east; Qia cut by fault; Qya grades to scarp	Post Qia; pre Qya [180,000, >1000 yr B.P.]

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