Chronology file name : AR018.CRN Measurement file name : AR018.RWL Date checked : 01JUL96 Technician's name : MARIETTE SEKLECKI Supervisor's name : HENRI D. GRISSINO-MAYER Beginning year : 1650 Ending year : 1980 Principal investigators: D.W. STAHLE Site name : BLACK FORT MOUNTAIN Site location : ARKANSAS, USA Species information : QUAL WHITE OAK Latitude : 3443N Longitude : 9427W Elevation : 745 M Series intercorrelation: 0.558 Avg mean sensitivity : 0.221 Avg standard deviation : 0.288 Avg autocorrelation : 0.705 Number dated series : 34 Segment length tested : 50 Number problem segments: 21 Pct problem segments : 7.05 Are there obvious misdated series? NO Number possible misdated series : N/A Percent misdated series : 0.00 Do they affect chronology quality? N/A Recommend withhold from ITRDB? N/A Comments: #12 BFM14B 1700-1849, #31 BFM30A 1850-1949 HAVE LOW CORRELATIONS ALL FLAGS = LOW CORRELATIONS WITH MASTER EXCELLENT DATA SET PART 5: CORRELATION OF SERIES BY SEGMENTS: 23:31 Mon 01 JUL 1996 Page 5 ----------------------------------------------------------------------------------------------------------------------------------- Correlations of 50-year dated segments, lagged 25 years Flags: A = correlation under 0.3281 but highest as dated; B = correlation higher at other than dated position Seq Series Time_span 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 BFM04A 1775 1980 .42 .62 .79 .68 .59 .63 .73 .67 2 BFM04B 1776 1980 .51 .71 .63 .62 .70 .67 .67 .68 3 BFM05A 1775 1980 .50 .58 .56 .60 .67 .61 .49 .51 4 BFM05B 1734 1980 .37 .21B .45 .53 .57 .62 .68 .71 .72 .71 5 BFM09A 1741 1980 .51 .56 .60 .61 .65 .64 .61 .57 .69 .73 6 BFM09B 1753 1980 .51 .54 .64 .54 .63 .66 .59 .64 .67 7 BFM10A 1715 1980 .47 .67 .55 .45 .56 .61 .54 .44 .56 .58 .60 8 BFM10B 1745 1980 .29A .32A .59 .52 .31A .47 .50 .62 .72 .67 9 BFM11A 1740 1980 .41 .43 .46 .63 .74 .60 .53 .58 .63 .62 10 BFM11B 1741 1980 .35 .32A .56 .71 .77 .60 .57 .67 .75 .77 11 BFM14A 1650 1980 .61 .51 .08B .12B .47 .51 .56 .45 .37 .32A .36 .36 12 BFM14B 1694 1980 .42 .27B .08B-.16B .16B .27A .34 .36 .39 .52 .53 .54 13 BFM17A 1774 1980 .42 .42 .65 .70 .59 .44 .55 .73 .74 14 BFM17B 1797 1980 .62 .63 .75 .58 .56 .65 .69 .71 15 BFM18A 1744 1980 .45 .50 .60 .61 .48 .48 .65 .64 .41 .41 16 BFM18B 1739 1980 .31A .32A .52 .70 .62 .54 .54 .49 .48 .39 17 BFM19A 1832 1980 .69 .73 .51 .32A .33 .33 18 BFM19B 1813 1980 .43 .58 .55 .54 .55 .53 .53 19 BFM20A 1800 1980 .64 .65 .59 .50 .48 .52 .56 20 BFM20B 1800 1980 .39 .40 .68 .57 .55 .62 .60 21 BFM21A 1832 1980 .50 .53 .54 .59 .75 .75 22 BFM21B 1835 1980 .61 .62 .52 .58 .67 .66 23 BFM23B 1788 1980 .53 .54 .64 .58 .58 .49 .55 .55 24 BFM24A 1720 1980 .25A .38 .51 .72 .59 .55 .52 .49 .62 .72 .76 25 BFM24B 1764 1980 .67 .71 .75 .71 .59 .50 .57 .74 .80 26 BFM25A 1772 1980 .49 .49 .59 .71 .63 .60 .68 .72 .79 27 BFM25B 1740 1980 .33 .35 .54 .62 .65 .52 .51 .63 .56 .56 28 BFM03B 1741 1980 .34 .42 .69 .80 .72 .55 .52 .62 .61 .61 29 BFM07B 1800 1980 .80 .74 .64 .61 .75 .73 .75 30 BFM26A 1838 1980 .67 .76 .73 .47 .58 .57 31 BFM30A 1750 1980 .45 .52 .54 .58 .28A .15B .32A .43 .47 32 BFM31A 1807 1980 .58 .75 .46 .44 .57 .37 .21B 33 BFM33A 1767 1980 .57 .55 .70 .74 .58 .52 .61 .62 .66 34 BFM41A 1753 1980 .45 .35 .51 .67 .69 .56 .51 .72 .77 PART 7: DESCRIPTIVE STATISTICS: 23:31 Mon 01 JUL 1996 Page 7 ----------------------------------------------------------------------------------------------------------------------------------- Corr //-------- Unfiltered --------\\ //---- Filtered -----\\ No. No. No. with Mean Max Std Auto Mean Max Std Auto AR Seq Series Interval Years Segmt Flags Master msmt msmt dev corr sens value dev corr () --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- 1 BFM04A 1775 1980 206 8 0 0.619 0.70 2.41 0.420 0.696 0.308 2.09 0.369 -0.014 1 2 BFM04B 1776 1980 205 8 0 0.623 0.83 2.10 0.327 0.602 0.265 2.05 0.317 -0.016 1 3 BFM05A 1775 1980 206 8 0 0.553 0.63 1.43 0.232 0.706 0.210 2.20 0.342 -0.016 1 4 BFM05B 1734 1980 247 10 1 0.570 0.61 2.08 0.321 0.812 0.255 2.05 0.352 -0.009 1 5 BFM09A 1741 1980 240 10 0 0.621 0.92 2.12 0.292 0.635 0.212 2.16 0.313 -0.001 1 6 BFM09B 1753 1980 228 9 0 0.588 0.86 1.73 0.268 0.639 0.202 2.02 0.351 -0.031 1 7 BFM10A 1715 1980 266 11 0 0.538 0.96 3.84 0.523 0.857 0.194 2.06 0.323 0.017 1 8 BFM10B 1745 1980 236 10 3 0.502 0.91 2.87 0.366 0.779 0.203 2.03 0.363 0.009 2 9 BFM11A 1740 1980 241 10 0 0.573 0.76 1.61 0.241 0.678 0.199 2.11 0.346 -0.014 1 10 BFM11B 1741 1980 240 10 1 0.612 0.68 1.49 0.199 0.597 0.193 2.06 0.334 0.012 1 11 BFM14A 1650 1980 331 12 3 0.432 0.37 0.85 0.143 0.729 0.251 1.94 0.302 -0.017 2 12 BFM14B 1694 1980 287 12 5 0.338 0.41 0.98 0.165 0.757 0.234 2.06 0.345 -0.040 1 13 BFM17A 1774 1980 207 9 0 0.577 0.50 0.90 0.110 0.524 0.163 2.35 0.437 -0.024 1 14 BFM17B 1797 1980 184 8 0 0.637 0.75 1.42 0.218 0.536 0.206 2.07 0.346 -0.021 1 15 BFM18A 1744 1980 237 10 0 0.523 0.53 1.43 0.206 0.795 0.177 2.01 0.409 -0.009 1 16 BFM18B 1739 1980 242 10 2 0.502 0.44 1.14 0.162 0.722 0.208 2.23 0.386 -0.006 1 17 BFM19A 1832 1980 149 6 1 0.489 0.61 1.00 0.131 0.696 0.133 1.95 0.307 0.008 1 18 BFM19B 1813 1980 168 7 0 0.524 0.70 1.33 0.171 0.624 0.154 2.03 0.241 0.013 1 19 BFM20A 1800 1980 181 7 0 0.581 0.66 1.35 0.206 0.604 0.215 2.02 0.378 0.003 1 20 BFM20B 1800 1980 181 7 0 0.537 0.61 1.94 0.243 0.660 0.228 2.42 0.465 -0.003 1 21 BFM21A 1832 1980 149 6 0 0.606 1.24 4.97 0.789 0.815 0.228 2.16 0.367 0.010 1 22 BFM21B 1835 1980 146 6 0 0.616 1.12 3.80 0.616 0.850 0.205 1.90 0.310 -0.022 1 23 BFM23B 1788 1980 193 8 0 0.550 0.77 2.26 0.313 0.691 0.245 2.20 0.369 -0.015 1 24 BFM24A 1720 1980 261 11 1 0.571 0.60 1.97 0.272 0.643 0.267 1.91 0.286 -0.029 1 25 BFM24B 1764 1980 217 9 0 0.659 0.66 3.78 0.347 0.703 0.238 2.04 0.293 0.001 1 26 BFM25A 1772 1980 209 9 0 0.637 0.61 2.60 0.284 0.712 0.229 2.27 0.368 -0.036 1 27 BFM25B 1740 1980 241 10 0 0.530 0.52 3.07 0.320 0.666 0.245 2.14 0.332 -0.032 1 28 BFM03B 1741 1980 240 10 0 0.592 0.64 2.54 0.356 0.790 0.245 2.02 0.313 -0.009 1 29 BFM07B 1800 1980 181 7 0 0.733 0.73 1.39 0.273 0.669 0.244 2.08 0.327 -0.034 1 30 BFM26A 1838 1980 143 6 0 0.643 0.97 3.65 0.526 0.785 0.230 2.20 0.389 -0.028 1 31 BFM30A 1750 1980 231 9 3 0.427 0.63 1.79 0.244 0.694 0.221 2.05 0.267 -0.040 1 32 BFM31A 1807 1980 174 7 1 0.449 0.68 1.88 0.356 0.853 0.185 1.95 0.272 -0.012 1 33 BFM33A 1767 1980 214 9 0 0.624 0.89 1.81 0.310 0.715 0.201 1.95 0.287 0.008 1 34 BFM41A 1753 1980 228 9 0 0.568 0.47 1.01 0.194 0.720 0.249 2.03 0.323 -0.046 4 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 7309 298 21 0.558 0.69 4.97 0.288 0.705 0.221 2.42 0.338 -0.013