Publication Sample-type Sample-ID Group-ID Sample Lat(DD) Long(DD) Elev(masl) Thickn(cm) Density(g/cm3) Shield 10Be-conc(at/g) 10Be-unc(at/g) 10Be-std 26Al-conc(at/g) 26Al-unc(at/g) 26Al-std Sampl-year Publ-10-age(yr) Publ-10-unc(yr) Publ-26-age(yr) Publ-26-unc(yr) 10Be-age(yr) 10-ext-unc(yr) 10-int-unc(yr) 26Al-age(yr) 26-ext-unc(yr) 26-int-unc(yr) Extra-publ Walcott et al. (2021) boulder Walc2021-1 Walc2021-A 18JB005 56.8482 -135.5314 47 3 2.65 1 66000 2120 07KNSTD 0 0 0 2018 15300 500 - - 14798 1032 477 - - - - Walcott et al. (2021) boulder Walc2021-2 Walc2021-A 18JB006 56.8471 -135.5315 43 3 2.65 1 64000 2350 07KNSTD 0 0 0 2018 14900 600 - - 14410 1037 531 - - - - Walcott et al. (2021) boulder Walc2021-3 Walc2021-A 18JB007 56.8527 -135.5363 46 3 2.65 1 66000 2230 07KNSTD 0 0 0 2018 15400 500 - - 14812 1044 502 - - - - Walcott et al. (2021) boulder Walc2021-4 Walc2021-A 18JB008 56.8528 -135.5362 46 3 2.65 1 59000 1990 07KNSTD 0 0 0 2018 13700 500 - - 13241 933 448 - - - - Walcott et al. (2021) boulder Walc2021-5 Walc2021-B 19SEAK-07 55.2469 -133.3414 376 2 2.65 0.9958 91900 3970 07KNSTD 0 0 0 2019 15600 700 - - 15247 1151 661 - - - - Walcott et al. (2021) boulder Walc2021-6 Walc2021-B 19SEAK-08 55.2470 -133.3419 392 2 2.65 0.9984 90300 6800 07KNSTD 0 0 0 2019 15000 1100 - - 14734 1439 1114 - - - - Walcott et al. (2021) boulder Walc2021-7 Walc2021-B 19SEAK-09 55.2477 -133.3406 394 2 2.65 1 105000 7440 07KNSTD 0 0 0 2019 17400 1200 - - 17034 1606 1212 - - - - Walcott et al. (2021) bedrock Walc2021-8 Walc2021-B 19SEAK-10 55.2477 -133.3406 419 3 2.65 1 121000 7550 07KNSTD 0 0 0 2019 19700 1200 - - 19310 1701 1211 - - - - Walcott et al. (2021) boulder Walc2021-9 Walc2021-C 19SEAK-17 56.3677 -134.9015 140 2 2.65 0.9923 80200 3840 07KNSTD 0 0 0 2019 16900 800 - - 16481 1291 792 - - - - Walcott et al. (2021) bedrock Walc2021-10 Walc2021-C 19SEAK-18 56.3723 -134.9084 129 2 2.65 1 102000 4270 07KNSTD 0 0 0 2019 21700 900 - - 20952 1568 882 - - - - Walcott et al. (2021) bedrock Walc2021-11 Walc2021-C 19SEAK-19 56.3718 -134.9094 126 2 2.65 1 131000 5050 07KNSTD 0 0 0 2019 28000 1100 - - 26911 1968 1044 - - - - Walcott et al. (2021) boulder Walc2021-12 Walc2021-C 19SEAK-20 56.3712 -134.9082 135 2 2.65 1 68000 3470 07KNSTD 0 0 0 2019 14400 700 - - 13964 1121 715 - - - - Walcott et al. (2021) boulder Walc2021-13 Walc2021-D 19SEAK-21 56.3636 -134.9068 48 2 2.65 1 62300 2840 07KNSTD 0 0 0 2019 14400 700 - - 13907 1069 636 - - - - Walcott et al. (2021) bedrock Walc2021-14 Walc2021-D 19SEAK-22 56.3636 -134.9072 58 2 2.65 0.9749 61300 2360 07KNSTD 0 0 0 2019 14400 600 - - 13902 1013 537 - - - - Walcott et al. (2021) boulder Walc2021-15 Walc2021-D 19SEAK-23 56.3638 -134.9092 68 2 2.65 0.9911 66000 2510 07KNSTD 0 0 0 2019 15100 600 - - 14577 1059 556 - - - - Walcott et al. (2021) boulder Walc2021-16 Walc2021-E 19SEAK-24 56.3228 -134.8920 150 1.5 2.65 1 78300 2630 07KNSTD 0 0 0 2019 16300 500 - - 15760 1110 531 - - - - Walcott et al. (2021) bedrock Walc2021-17 Walc2021-E 19SEAK-25 56.3231 -134.8916 163 1.5 2.65 1 76800 2670 07KNSTD 0 0 0 2019 15700 600 - - 15274 1084 533 - - - - Walcott et al. (2021) bedrock Walc2021-18 Walc2021-F 19SEAK-26 56.3554 -134.8856 145 2 2.65 0.9879 85600 3470 07KNSTD 0 0 0 2019 18200 700 - - 17574 1301 716 - - - - Walcott et al. (2021) bedrock Walc2021-19 Walc2021-F 19SEAK-27 56.3555 -134.8855 142 1.5 2.65 0.9963 95900 3670 07KNSTD 0 0 0 2019 20200 800 - - 19469 1418 749 - - - - Walcott et al. (2021) boulder Walc2021-20 Walc2021-G 20SEAK-7 57.3112 -135.8126 558 1.5 2.65 0.9976 105000 5590 07KNSTD 0 0 0 2020 14900 800 - - 14363 1173 767 - - - - Walcott et al. (2021) bedrock Walc2021-21 Walc2021-G 20SEAK-10 57.3112 -135.8111 559 1.5 2.65 0.96912 92300 6500 07KNSTD 0 0 0 2020 13400 1000 - - 12976 1218 917 - - - - Walcott et al. (2021) boulder Walc2021-22 Walc2021-G 20SEAK-12 57.3110 -135.8110 569 1 2.65 0.9927 106000 4770 07KNSTD 0 0 0 2020 14900 700 - - 14363 1099 649 - - - - Walcott et al. (2021) boulder Walc2021-23 Walc2021-G 20SEAK-13 57.3109 -135.8109 568.3 1 2.65 0.9941 104000 5650 07KNSTD 0 0 0 2020 14600 800 - - 14084 1161 768 - - - - Walcott et al. (2021) bedrock Walc2021-24 Walc2021-H 20SEAK-14 57.4621 -135.6354 476 0.5 2.65 1 101000 4800 07KNSTD 0 0 0 2020 15300 700 - - 14730 1150 703 - - - - Walcott et al. (2021) boulder Walc2021-25 Walc2021-H 20SEAK-15 57.4621 -135.6354 476 1 2.65 1 83800 4500 07KNSTD 0 0 0 2020 12700 700 - - 12218 1001 658 - - - - Walcott et al. (2021) boulder Walc2021-26 Walc2021-H 20SEAK-16 57.4618 -135.6351 473 1.5 2.65 1 59200 3780 07KNSTD 0 0 0 2020 9000 600 - - 8612 766 551 - - - - Walcott et al. (2021) boulder Walc2021-27 Walc2021-I 20SEAK-18 57.5743 -135.2721 817 3 2.65 1 109000 7990 07KNSTD 0 0 0 2020 12400 900 - - 11835 1136 870 - - - - Walcott et al. (2021) bedrock Walc2021-28 Walc2021-I 20SEAK-19 57.5743 -135.2720 816 1.5 2.65 1 125000 5810 07KNSTD 0 0 0 2020 14100 700 - - 13514 1046 630 - - - - Walcott et al. (2021) bedrock Walc2021-29 Walc2021-J 20SEAK-22 57.6425 -135.3483 779 2 2.65 1 152000 6590 07KNSTD 0 0 0 2020 17700 800 - - 17022 1287 741 - - - - Reference: Walcott CK, Briner JP, Baichtal JF, Lesnek AJ, Licciardi JM, 2021. A cosmogenic nuclide chronology of Cordilleran ice sheet configuration during the last glacial maximum in the northern Alexander Archipelago, Alaska. Geochronology Discussions. Data comments: Latitude for sample 19SEAK-17 changed from 55.3677 to 56.3677. Sampling year based on sample names. Group ID based on publication (Table 1). expage.github.io - data from expage-202306