Ecological Archives E084-004-A2

Daniel G. Gavin, Linda B. Brubaker, and Kenneth P. Lertzman. 2003. Holocene fire history of a coastal temperate rain forest based on soil charcoal radiocarbon dates. Ecology 84:186–201.

Appendix B. Radiocarbon dates of soil charcoal obtained from the Clayoquot Valley, Vancouver Island, British Columbia, Canada.

Site code†

Site coordinates
UTM Zone 10

Forest type‡

Hillslope
or
Terrace

Horizon§

Soil core ID

Depth (cm)

Depth in horizon (cm)

Number of pieces dated

Sample code||

Lab number (CAMS #)

d13C

Radiocarbon date

Calibrated age (cal. years BP)††

95.4% cal age ranges (cal. years BP)‡‡

  Easting Northing                          
1 316615 5451494 CH H O C 3 3 1 LE06ChO 32224 -27.64 840 ± 60 730 910–670
1 316615 5451494 CH H B C 13 2 2 LE06ChB1 32225 -25.89 4280 ± 50 4840 5030–4650
1 316615 5451494 CH H B C 17 6 1 LE06ChB2 32226 -25.49 5460 ± 60 6280 6400–6010
2 316246 5451514 HF H B G 20 10 1 LE03G 32345 -26.87 7690 ± 50 8440 8590–8390
3 315977 5451691 CH H O H 35 35 1 LE02hmid 32223 -26.18 2980 ± 60 3150 3330–2970
3 315977 5451691 CH H O H 40 40 1 LE02hbottom 39386 -24.44 4920 ± 40 5620 5720–5590
4 316410 5451700 CH H B A 5 3 2 LE61A 43865 -24.9 7320 ± 50 8120 8280–7980
5 316672 5451703 CH H B A 13 2 3 LE07AhB 32227 -27.36 2360 ± 50 2350 2660–2180
6 317123 5451733 CH H A A 7 2 1 PR08AhA 39389   1200 ± 50 1140 1260–990
6 317123 5451733 CH H B A 12 2 1 PR08AhB1 32340   990 ± 50 930 1040–770
7 316353 5451808 CH H B A 5 2 1 LE60A 43864   2780 ± 40 2870 2950–2780
8 317603 5451928 HF H B B 12 2 2 PR07BhB 32230 -26.07 2690 ± 50 2780 2910–2740
9 315531 5452040 CH H B B 15 9 1 LW01BhB2 32228 -27.54 1370 ± 60 1290 1390–1180
9 315531 5452040 CH H B B 30 26 1 LW01BhB4 32341 -23.51 1150 ± 50 1060 1180–960
10 316481 5452043 CH H O A 3 3 1 MR1h3-4A 26978   2400 ± 60 2360 2710–2340
10 316481 5452043 CH H O A 4 4 1 MR1h4-5A 26979   2360 ± 70 2350 2710–2160
10 316481 5452043 CH H O A 13 13 1 MR1h13-14 26980   2390 ± 60 2360 2710–2330
10 316481 5452043 CH H O A 14 14 1 MR1h14-15 26981   2360 ± 80 2350 2710–2160
11 319211 5452044 HF T B C 15 1 1 TA82ChB1 53479   8780 ± 60 9850 10150–9560
12 315543 5452228 CH H B C 5 1 3 LW60ChB1 43868 -22.62 1140 ± 50 1030 1170–950
12 315543 5452228 CH H B C 9 5 10 LW60ChB2 43869 -26.88 1060 ± 50 960 1070–800
13 318912 5452260 CH T B C 11 4 2 TA81ChB2 53478   9210 ± 50 10340 10500–10240
16 317114 5452379 CS H B A 6 2 1 PR06AhB1 32343 -27.81 430 ± 60§§ 510 550–320
16 317114 5452379 CS H B A 11 7 1 PR06AhB2 39387   410 ± 40§§ 500 520–320
16 317114 5452379 CS H B A 17 13 1 PR06AhB3 39388   1060 ± 50 960 1070–800
16 317114 5452379 CS H B A 22 18 1 PR06AhB4 32344 -25.73 1590 ± 60 1520 1610–1340
17 315914 5452439 CH H A C 10 5 2 LW06C 32229 -22.59 1120 ± 60 1030 1170–940
18 318578 5452498 CH T B C 15 10 1 TA03C 53477   9410 ± 50 10610 11040–10430
18 318578 5452498 CH T B B 23 20 1 TA03BhB2 39510   9670 ± 70 11140 11200–10750
20 316159 5452534 HF T O A 15 15 1 CR1h15-16 27019   1080 ± 50 970 1170–920
20 316159 5452534 HF T O A 17 17 1 CR1h17-18 27020   1060 ± 50 960 1070–800
20 316159 5452534 HF T O A 19 19 1 CR1h19-20 27021   910 ± 70 820 930–700
20 316159 5452534 HF T O A 24 24 1 CR1h24-26 27022   1020 ± 50 930 1050–790
20 316159 5452534 HF T B A 27 1 1 CR1h27-28 27023   3600 ± 70 3890 4090–3700
21 316568 5452604 HF H O A 4 4 1 UE01A 43885 -22.26 1970 ± 50 1910 2050–1820
22 317080 5452672 HF H B D 5 1 1 UE03D 53480   2950 ± 60 3130 3320–2950
22 317080 5452672 HF H B C 5 1 1 UE03C 32346 -25.43 5730 ± 60 6500 6710–6400
23 316048 5452723 CH H B B 13 4 8 LW50B 43867 -25.55 1410 ± 50 1300 1410–1240
24 317729 5452746 CH H B C 11 2 1 URE17ChB1 32244 -27.39 2220 ± 60 2200 2350–2070
24 317729 5452746 CH H B C 17 8 3 URE17ChB2 32245 -24.42 8190 ± 60 9180 9400–9010
25 317317 5452764 CH H O A 12 12 1 LU1 25013   1630 ± 70 1530 1700–1360
25 317317 5452764 CH H O A 10 10 1 LU1A 25014   4150 ± 60 4690 4830–4530
25 317317 5452764 CH H O B 10 10 1 LU2B 25015   1290 ± 70 1240 1320–1060
25 317317 5452764 CH H O B 15 15 1 LU2C 25016   1420 ± 50 1310 1410–1270
26 317753 5452830 CH T B 6 5 2 2 URE56BhB 43893 -24.8 2920 ± 50 3080 3240–2890
26 317753 5452830 CH T B 6 5 2 1 URE56AhB 53497   5310 ± 50 6070 6270–5940
28 318279 5452843 CH H B 5 13 8 2 URE55ChB3 53488   860 ± 60|||| 750 910–680
28 318279 5452843 CH H B 5 21 10 2 URE55BhB3 43892 -24.5 9030 ± 50 10210 10360–9920
29 317091 5453081 SS T B 3 8 3 1 URW53AhB 43924 -26.99 1210 ± 50 1160 1260–990
30 318168 5453230 CH T B B 20 13 2 TA02BhB2 32347 -22.6 4060 ± 50 4560 4810–4420
30 318168 5453230 CH T B B 33 25 8 TA02BhB3 32236 -26.09 4150 ± 50 4690 4830–4530
31 318320 5453274 CH T B B 7 5 6 URE57BhB3 43894   2590 ± 50 2750 2790–2480
32 316995 5453312 CH T B B 8 6 1 URW82B 53498   6170 ± 40 7090 7210–6940
33 317200 5453405 SS T B B 9 5 1 URW02BhB 54628   500 ± 50 520 640–470
33 317200 5453405 SS T B C 10 6 4 URW02C 32246 -25.83 3070 ± 50 3290 3390–3080
34 316584 5453419 CH H O A 4 4 1 URW80A 53496   1300 ± 50 1260 1300–1090
35 317479 5453455 SS T B B 5 3 2 URW63BhB2 43926   1120 ± 50 1030 1170–940
35 317479 5453455 SS T B B 7 5 1 URW63BhB3 43927   1340 ± 50 1280 1340–1170
36 318398 5453509 CH H O B 2 2 1 URE54BhO1 43890 -24.28 2790 ± 50 2910 3000–2770
36 318398 5453509 CH H B B 9 1 1 URE54BhB1 43891 -25.76 4550 ± 50 5300 5450–5000
37 317211 5453600 CH H A D 5 5 1 URW62D 43925   980 ± 50 925 970–770
38 318269 5453624 CH H A A 3 3 3 URE52A 53487   2710 ± 50 2780 910–670
38 318269 5453624 CH H A B 3 3 1 URE52B 43889   4330 ± 50 4870 5040–4830
39 318902 5453780 CH H A C 8 6 1 URE16C 53485   3050 ± 70 3300 3430–3000
39 318902 5453780 CH H A A 6 6 1 URE16A 32243 -26.08 3470 ± 50 3710 3860–3630
40 318454 5453831 CH H A E 7 1 3 URE51EhAE1 43888   450 ± 40 510 540–340
41 318739 5453923 CH H B D 4 5 1 URE15D 53484   3190 ± 50 3430 3550–3270
42 318062 5453958 SS T B A 6 4 1 URW60A 53495   960 ± 70 920 1050–730
43 317723 5454001 SS T B A 8 6 4 URW03A 32247 -27.3 3420 ± 40 3660 3830–3570
44 318837 5454056 HF T B C 8 2 1 URE14ChB1 32240 -27.45 6900 ± 60 7690 7910–7610
44 318837 5454056 HF T B C 13 7 1 URE14ChB2 32241 -26.54 3880 ± 60 4330 4440–4100
44 318837 5454056 HF T B C 16 10 2 URE14ChB3 32242 -29.72 3860 ± 60 4250 4420–4090
45 317590 5454117 CH H O A 4 4 1 URW52A 43923 -25.01 850 ± 50 740 910–670
47 318709 5454267 SS T B C 8 2 8 URE50ChB2 43887 -24.45 9560 ± 50 10960 11110–10690
47 318709 5454267 SS T B B 14 3 1 URE50BhB2 53486   10030 ± 50 11440 11920–11260
52 318186 5454518 CS H O A 3 3 1 URW65A 43928 -26.04 440 ± 40 510 540–330
53 318682 5454624 HF T B C 5 3 10 URE61ChB2 43895 -25.3 8690 ± 60 9630 9890–9540
53 318682 5454624 HF T B C 9 7 1 URE61ChB4 43896   3250 ± 50 3470 3630–3370
53 318682 5454624 HF T B C 11 9 7 URE61ChB5 43897   8460 ± 60 9490 9550–9300
54 318785 5454734 HF T B A 12 6 2 URE65A 43915 -24.01 6570 ± 50 7450 7570–7380
54 318785 5454734 HF T B C 10 5 1 URE65C 53490   7180 ± 50 7970 8150–7870
55 318368 5454774 HF T B B 13 3 2 URW06BhB 53494   4750 ± 50 5540 5590–5320
55 318368 5454774 HF T B C 12 2 1 URW06C 39390   4900 ± 50 5610 5740–5490
57 318598 5454878 HF T B C 7 7 1 URE62C 43898 -24.75 2400 ± 50 2360 2710–2340
57 318598 5454878 HF T B A 7 7 1 URE62A 53489   10240 ± 50 11790 12350–11690
59 318488 5454970 CH T B A 10 4 1 URW66AhB2 43929 -24.75 4680 ± 50 5380 5580–5310
61 318401 5455033 CH H O A 3 3 2 URW67A 43930 -23.32 640 ± 50 580 660–550
63 318540 5455295 SS T B B 13 5 1 URW01BhB1 53492   8190 ± 50 9180 9400–9020
63 318540 5455295 SS T B B 27 19 1 URW01BhB3 53493   8150 ± 50 9060 9270–9010
64 318687 5455317 HF T B B 18 15 1 URE07BhB2 32237 -24.66 9180 ± 50 10320 10480–10230
64 318687 5455317 HF T B B 27 22 4 URE07BhB3 32238 -26.97 8710 ± 50 9640 9890–9550
65 318359 5455498 HF H A B 9 2 4 URW07BhA1 32249 -26.19 390 ± 40 470 510–320
65 318359 5455498 HF H A B 17 10 6 URW07BhA3 32250 -24.01 3110 ± 60 3350 3470–3160
66 318728 5455554 HF T O A 2 2 1 URE67AhO 43917   600 ± 90 600 700–480
66 318728 5455554 HF T B A 8 5 1 URE67AhB3 43918   8340 ± 50 9400 9480–9140
66 318728 5455554 HF T B A 12 9 6 URE67AhB5 43919 -23.06 8280 ± 50 9370 9460–9090
67 318999 5455608 CH H O A 2 2 1 URE68A 43920 -24.34 400 ± 50 480 520–320
68 318389 5455707 HF T B B 13 2 2 URE66BhB 43916   8120 ± 90 9030 9400–8720
68 318389 5455707 HF T B C 6 2 1 URE66ChB 54629   9440 ± 70 10640 11080–10430
69 318051 5455754 CH H B C 12 8 1 URW08ChB3 39509   9120 ± 70 10240 10490–10180
69 318051 5455754 CH H B C 16 12 1 URW08ChB4 39391   9210 ± 50 10340 10500–10240
73 318160 5456270 CH H O C 3 3 3 RT60ChO 43883 -25.8 520 ± 50 530 650–500
73 318160 5456270 CH H B B 9 5 12 RT60BhB2 43884 -26.32 750 ± 50 670 780–560
74 318176 5456490 HF H O A 10 10 4 RT50A 43872   270 ± 50 305 470–10
75 318315 5456634 CH H B A 15 2 1 RT05AhB 53475   8320 ± 50 9350 9470–9130
76 318098 5456642 CH H O A 7 7 1 RT51hO3 43875 -23.93 350 ± 40§§ 350 490–310
76 318098 5456642 CH H O A 9 9 1 RT51hO4 43876 -23.94 420 ± 50§§ 500 530–320
76 318098 5456642 CH H A A 11 1 1 RT51hA1 43873 -24.4 350 ± 40§§ 350 490–310
76 318098 5456642 CH H A A 17 7 1 RT51hA4 43874 -27.13 5860 ± 50 6700 6790–6510
77 318268 5456976 HF H B C 14 6 1 RT53ChB2 43877 -22.95 480 ± 50 520 630–340
78 318878 5457186 HF H B A 17 9 1 RT12AhB2 39394   10330 ± 50 12220 12770–11770
79 318360 5457197 HF T B A 10 5 2 RT55AhB3 43879   8890 ± 190 10060 10420–9530
80 318429 5457658 HF T O A 2 2 3 RT57AhO1 43880   8300 ± 50 9360 9470–9130
80 318429 5457658 HF T B A 10 3 3 RT57AhB2 43881   9130 ± 60 10240 10470–10190
80 318429 5457658 HF T B A 14 7 12 RT57AhB4 43882 -25.48 8640 ± 50 9550 9770–9530
81 318842 5457661 HF T O C 5 5 1 RT54C 43878   460 ± 70 510 630–320
82 318351 5457983 CH T O A 8 2 1 RT81A 53476   430 ± 50 510 540–320
83 318522 5458099 CH T B B 13 5 1 RT07BhB1 39392   9560 ± 60 10960 11150–10690
83 318522 5458099 CH T B C 33 25 1 RT07ChB4 39393   5910 ± 40 6700 6850–6650
reject     HF T B C 5 2 1 URE81ChB 53491   280 ± 50|||| 310 480–10

† Site codes refer to Fig. 4.

‡ CH = cedar-hemlock, HF = hemlock-fir, SS = Sitka spruce, CS = cedar-salal.

§ O = organic horizon, A = mixed horizon, B = mineral horizon.

||Code attached to sample submitted for radiocarbon date.

Assumed to be -25 where not measured.

†† Median cal age intercept only, rounded to nearest decade (Stuiver and Reimer 1993; Stuiver et al. 1998).

‡‡ Minimum and maximum of ranges only, rounded to nearest decade.

§§ More accurate tree-ring date available; date not used (n = 5).

|||| Date rejected because radiocarbon age was based on low total carbon (<0.2 mg) and the date was anamolous for the forest context (young date in very old forest), and thus likely contaminated by younger carbon (n = 2).

Literature Cited

Stuiver, M., and P. J. Reimer. 1993. Extended 14C database and revised CALIB radiocarbon calibration program. Radiocarbon 35:215–230.

Stuiver, M., P. J. Reimer, E. Bard, J. W. Beck, G. S. Burr, K. A. Hughen, B. Kromer, G. McCormac, J. Van der Plicht, and M. Spurk. 1998. INTCAL98 radiocarbon age calibration, 24,000-0 cal BP. Radiocarbon 40:1041–1083.

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