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(Henri Grissino-Mayer)\n\na) Sample identifier (Dendro-Lab Key-code): ELMA3410\/CER118B, ELMA3468\/CER113A\nb) Sample certainly derives from a single tree (Y\/N): Y\nc) Site: El Malpais National Monument, New Mexico, USA \nd) Object type: Sub-fossil log\ne) Preservation: Dry\nf) Sample type (e.g. core or slice): cross section\ng) Species: Douglas-fir, Pseudotsuga menziesii (Mirb.) Franco\nh) No of rings: 529 (ELMA3410\/CER118B), 397 (ELMA3468\/CER113A)\ni) Pith (Y\/N): N\nj) Waney edge: N\nk) Bark (Y\/N): N\nl) Sapwood (Y\/N): N\nm) Methodology used for dating: Graphically = skeleton plot method; Statistical verification through COFECHA.\n\nn) We dated the series using COFECHA (Version 6.06P). Crossdating was a two-step verification process. First, I attempt to date each series against other series from the site, once an overlap in years is suggested by the skeleton plot and by COFECHA, the series is then added to the master ELMA data set. All crossdating metrics must indicate with a high degree of statistical certainty (p < 0.0001) that the sample is indeed crossdated in its exact temporal position. Secondly, once all series are included in the master data set for ELMA, a chronology was created for the site and compared to nearby tree-ring chronologies that were developed from archaeological sites throughout the American Southwest. This process is given in detail in my dissertation and in the subsequent peer-reviewed publication:\n\nH.D. Grissino-Mayer, 1995. Tree-Ring Reconstructions of Climate and Fire History at El Malpais National Monument, New Mexico. Ph.D. dissertation, The University of Arizona, Tucson. 407 pp.\n\nH.D. Grissino-Mayer, 1996. A 2129 Year Reconstruction of Precipitation for Northwestern New Mexico, USA. Pages 191\u2013204 in J.S. Dean, D.M. Meko, and T.W. Swetnam, eds., Tree Rings, Environment, and Humanity. Radiocarbon 1996, The University of Arizona Press: Tucson. \n\nDated individually (Y\/N): Y\nIntra-site\/phase cross-matching with (Lab-Keycodes, relative positions, Mean curve identifier):\nNONE\n\no) Raw ring width series attached\n\nPublicly deposited (Y\/N): Yes. Archived in the International Tree-Ring Data Bank as dataset NM572.rwl\n\np) Remainder of sample is stored in which archive?\nLaboratory of Tree-Ring Research, The University of Arizona, Tucson, Arizona, 85721.\n","code":"Correlations of  50-year dated segments, lagged  25 years\n Flags:  A = correlation under   .3281 but highest as dated;  B = correlation higher at other than dated position\n\nSeq Series  Time_span    350  375  400  425  450  475  500  525  550  575  600  625  650  675  700  725  750  775  800  825\n                         399  424  449  474  499  524  549  574  599  624  649  674  699  724  749  774  799  824  849  874\n --- -------- ---------  ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----\n108 CRE118B   667 1195                                                               .76  .76  .81  .85  .80  .85  .87  .77\n\n\nSeq Series  Time_span    850  875  900  925  950  975 1000 1025 1050 1075 1100 1125 1150 1175 1200 1225 1250 1275 1300 1325\n                         899  924  949  974  999 1024 1049 1074 1099 1124 1149 1174 1199 1224 1249 1274 1299 1324 1349 1374\n --- -------- ---------  ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----\n108 CRE118B   667 1195   .72  .82  .90  .89  .85  .79  .81  .85  .88  .87  .85  .91  .94\n\n\n                                                Corr   \/\/-------- Unfiltered --------\\\\  \/\/---- Filtered -----\\\\\n                           No.    No.    No.    with   Mean   Max     Std   Auto   Mean   Max     Std   Auto  AR\n Seq Series   Interval   Years  Segmt  Flags   Master  msmt   msmt    dev   corr   sens  value    dev   corr  ()\n --- -------- ---------  -----  -----  -----   ------ -----  -----  -----  -----  -----  -----  -----  -----  --\n108 CRE118B   667 1195    529     21      0    .840    .49   2.81   .353   .555   .484   2.71   .369  -.023   2\n\n\nCorrelations of  50-year dated segments, lagged  25 years\n Flags:  A = correlation under   .3281 but highest as dated;  B = correlation higher at other than dated position\n\n Seq Series  Time_span    350  375  400  425  450  475  500  525  550  575  600  625  650  675  700  725  750  775  800  825\n                          399  424  449  474  499  524  549  574  599  624  649  674  699  724  749  774  799  824  849  874\n --- -------- ---------  ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----\n101 CRE113A   818 1214                                                                                             .81  .84\n\n\n Seq Series  Time_span    850  875  900  925  950  975 1000 1025 1050 1075 1100 1125 1150 1175 1200 1225 1250 1275 1300 1325\n                          899  924  949  974  999 1024 1049 1074 1099 1124 1149 1174 1199 1224 1249 1274 1299 1324 1349 1374\n --- -------- ---------  ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----\n101 CRE113A   818 1214   .80  .85  .86  .85  .85  .82  .80  .81  .75  .73  .76  .83  .78  .7\n\n                                                Corr   \/\/-------- Unfiltered --------\\\\  \/\/---- Filtered -----\\\\\n                           No.    No.    No.    with   Mean   Max     Std   Auto   Mean   Max     Std   Auto  AR\n Seq Series   Interval   Years  Segmt  Flags   Master  msmt   msmt    dev   corr   sens  value    dev   corr  ()\n --- -------- ---------  -----  -----  -----   ------ -----  -----  -----  -----  -----  -----  -----  -----  --\n101 CRE113A   818 1214    397     16      0    .795    .73   2.15   .321   .399   .386   2.68   .420   .001   2\n\n","data":[],"refs":[]},{"series":"Study_3426","series_type":"NOAA_NCEI_Study","parameter_list":"","header_list":"","selected":true,"noaa_ncei_study":3426,"data":[],"refs":["doi:10.25921\/ct0t-bq88"]}],"refs":["doi:10.1038\/s41467-018-06036-0"]}}],"bibliography":[{"ref":"buntgen2018rrg","firstauthor":"B\u00fcntgen","year":2018,"reftype":"article","author":"B\u00fcntgen, Ulf and Wacker, Lukas and Galv\u00e1n, J. Diego and Arnold, Stephanie and Arseneault, Dominique and Baillie, Michael and Beer, J\u00fcrg and Bernabei, Mauro and Bleicher, Niels and Boswijk, Gretel and Br\u00e4uning, Achim and Carrer, Marco and Ljungqvist, Fredrik Charpentier and Cherubini, Paolo and Christl, Marcus and Christie, Duncan A. and Clark, Peter W. and Cook, Edward R. and D\u2019Arrigo, Rosanne and Davi, Nicole and Eggertsson, \u00d3lafur and Esper, Jan and Fowler, Anthony M. and Gedalof, Ze\u2019ev and Gennaretti, Fabio and Grie\u00dfinger, Jussi and Grissino-Mayer, Henri and Grudd, H\u00e5kan and Gunnarson, Bj\u00f6rn E. and Hantemirov, Rashit and Herzig, Franz and Hessl, Amy and Heussner, Karl-Uwe and Jull, A. J. Timothy and Kukarskih, Vladimir and Kirdyanov, Alexander and Kol\u00e1\u0159, Tom\u00e1\u0161 and Krusic, Paul J. and Kyncl, Tom\u00e1\u0161 and Lara, Antonio and LeQuesne, Carlos and Linderholm, Hans W. and Loader, Neil J. and Luckman, Brian and Miyake, Fusa and Myglan, Vladimir S. and Nicolussi, Kurt and Oppenheimer, Clive and Palmer, Jonathan and Panyushkina, Irina and Pederson, Neil and Rybn\u00ed\u010dek, Michal and Schweingruber, Fritz H. and Seim, Andrea and Sigl, Michael and Churakova, Olga and Speer, James H. and Synal, Hans-Arno and Tegel, Willy and Treydte, Kerstin and Villalba, Ricardo and Wiles, Greg and Wilson, Rob and Winship, Lawrence J. and Wunder, Jan and Yang, Bao and Young, Giles H. F.","title":"Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE","journal":"Nature Communications","volume":"9","number":"1","pagefrom":0,"pageto":0,"series":"","publisher":"Springer Science and Business Media LLC","address":"","booktitle":"","chapter":null,"edition":null,"organization":"","school":"","institution":"","url":"https:\/\/dx.doi.org\/10.1038\/s41467-018-06036-0","doi":"10.1038\/s41467-018-06036-0","isbn":"","citation":"B\u00fcntgen et al., 2018","reference":"B\u00fcntgen, U., Wacker, L., Galv\u00e1n, J.D., Arnold, S., Arseneault, D., Baillie, M., Beer, J., Bernabei, M., Bleicher, N., Boswijk, G., Br\u00e4uning, A., Carrer, M., Ljungqvist, F.C., Cherubini, P., Christl, M., Christie, D.A., Clark, P.W., Cook, E.R., D\u2019Arrigo, R., Davi, N., Eggertsson, \u00d3., Esper, J., Fowler, A.M., Gedalof, Z., Gennaretti, F., Grie\u00dfinger, J., Grissino-Mayer, H., Grudd, H., Gunnarson, B.E., Hantemirov, R., Herzig, F., Hessl, A., Heussner, K., Jull, A.J.T., Kukarskih, V., Kirdyanov, A., Kol\u00e1\u0159, T., Krusic, P.J., Kyncl, T., Lara, A., LeQuesne, C., Linderholm, H.W., Loader, N.J., Luckman, B., Miyake, F., Myglan, V.S., Nicolussi, K., Oppenheimer, C., Palmer, J., Panyushkina, I., Pederson, N., Rybn\u00ed\u010dek, M., Schweingruber, F.H., Seim, A., Sigl, M., Churakova, O., Speer, J.H., Synal, H., Tegel, W., Treydte, K., Villalba, R., Wiles, G., Wilson, R., Winship, L.J., Wunder, J., Yang, B. and Young, G.H.F. (2018) Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE. Nature Communications, 9(1). doi:10.1038\/s41467-018-06036-0"},{"ref":"grissino-mayer2002gmn","firstauthor":"Grissino-Mayer","year":2002,"reftype":"misc","author":"Grissino-Mayer, H.D.","title":"Grissino-Mayer - El Malpais National Monument - PSME - ITRDB NM572","journal":"","volume":"","number":"","pagefrom":0,"pageto":0,"series":"","publisher":"","address":"","booktitle":"","chapter":null,"edition":null,"organization":"","school":"","institution":"","url":"https:\/\/doi.org\/10.25921\/ct0t-bq88","doi":"10.25921\/ct0t-bq88","isbn":"","citation":"Grissino-Mayer 2002","reference":"Grissino-Mayer, H.D. (2002) Grissino-Mayer - El Malpais National Monument - PSME - ITRDB NM572. doi:10.25921\/ct0t-bq88"}],"compilation":{"by":"IntCal group","url":"https:\/\/intchron.org\/archive\/IntCal\/IntCal20\/index.json","updated":null,"retrieved":"2025-08-02T13:41:31+01:00"},"schema":"https:\/\/intchron.org\/schema"}