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Active Tectonics of the Devils Mountain Fault and Related Structures, Northern Puget Lowland and Eastern Strait of Juan de Fuca Region, Pacific Northwest

By Samuel Y. Johnson, Shawn V. Dadisman, David C. Mosher, Richard J. Blakely, and Jonathan R. Childs
Table 2. Radiocarbon data for samples from northern Whidbey and Camano Islands.
[Laboratory data are from Beta Analytic Inc.]
Sample Number Radiocarbon laboratory number Field locality
(fig 27) 		Radiocarbon age
(14C yr B.P.) 		13C/12C (0/00) Calibrated age (calendar year,
95.4% confidence) 		Material dated Comment
SJ-98-17 120288 c >48,480 -25.6 NA Peat Whidbey Formation north of Devils Mountain fault
JS-98-14 120287 h 1,750±50 -25.8 A.D.210-420 Wood in peat At Rocky Point between Strawberry Point and Utsalady Poin faults.
SJ-99-2 134854 m >44,000 -27.9 NA Peat Whidbey Formation in Strawberry Point fault zone at Strawberry Point.
SJ-99-1A 132512 r 21,100±150 -24.9 NA Organic laminae Nonglacial Olympia beds at Utsalady Point
SJ-99-1B 141690 r 15,190 ± 220 -23.6 17,435-18,985 B.P. Organic laminae Nonglacial Olympia beds at Utsalady Point.
SJ-00-1 144555 c >40,130 -28.2 NA Peat Whidbey Formation north of Devils Mountain fault.
SJ-00-7 144556 a >43,510 -26.9 NA Wood in peat Whidbey Formation south of Devils Mountain fault.
SJ-00-11 144557 i >44,320 -25.6 NA Peat Whidbey Formation south of Strawberry Point fault zone at Strawberry Point.
SJ-00-12 144558 j 29,270 ± 340 -27.6 NA Peat Olympia beds south of Strawberry Point fault zone at Strawberry Point.
SJ-00-13 144559 k 25,770 ± 310 -28.4 NA Peat Olympia beds south of Strawberry Point fault zone at Strawberry Point.
SJ-00-14 144554 n 44,740 ± 910 -28.9 NA Detrital wood Whidbey Formation i Strawberry Point fault zone at Strawberry Point; young age suggests probable contamination.
SJ-00-48 147710 i 37,190 ± 550 -25.8 NA Detrital wood Basal Olympia beds south of Strawberry Point fault zone at Strawberry Point.