# Lake Keilambete, SE Australia Holocene Sediment Data and Lake Level #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/22430 # Description: NOAA Landing Page # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013ms.txt # Description: NOAA location of the template # # Original_Source_URL: # Description: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Paleolimnology # # Dataset DOI: # # Parameter_Keywords: lake level, population abundance, geochemistry, reconstruction, physical property, oxygen isotopes #-------------------- # Contribution_Date # Date: 2017-07-10 #-------------------- # File_Last_Modified_Date # Date: 2017-07-10 #-------------------- # Title # Study_Name: Lake Keilambete, SE Australia Holocene Sediment Data and Lake Level #-------------------- # Investigators # Investigators: Wilkins, D.; Gouramanis, C.; De Deckker, P.; Fifeld, L. K.; Olley, J. #--------------------------------------- # Description_Notes_and_Keywords # Description: Multiproxy Holocene sediment data and lake level reconstructions from Lake Keilambete, southwestern Victoria, Australia # Provided Keywords: delta O-18, maar lake, Modern Analogue Technique, ostracod, precipitation/evaporation, Sr/Ca, western Victoria, southeastern Australia, climate-change, southern Australia, maar lakes, variability, sediments, history, core #--------------------------------------- # Publication # Authors: Daniel Wilkins, Chris Gouramanis, Patrick De Deckker, L. Keith Fifield, Jon Olley # Published_Date_or_Year: 2013-02-06 # Published_Title: Holocene lake-level fluctuations in Lakes Keilambete and Gnotuk, southwestern Victoria, Australia # Journal_Name: Holocene # Volume: 23 # Edition: # Issue: 6 # Pages: 784-795 # Report Number: # DOI: 10.1177/0959683612471983 # Online_Resource: http://journals.sagepub.com/doi/10.1177/0959683612471983 # Full_Citation: # Abstract: Reconstructed Holocene lake-level curves from two saline, hydrologically closed maar crater lakes in southwestern Victoria, Australia, show near synchronous lake-level changes throughout the Holocene. We show that lake levels, reconstructed from sediment particle size and ostracod valve chemistry (d18O and Sr/Ca) have undergone rapid (<100 yr), large (>10 m) fluctuations throughout the Holocene. Finer sampling resolution shows a more sensitive response to Holocene climate than was previously presented for Lake Keilambete. Both maar crater lakes show a short-lived maximum in Holocene lake levels around 7.2 ka. The period of lake filling leading to peak lake levels matches the phase of most effective precipitation (7.4-7.0 ka) reconstructed from a high-resolution speleothem record from northern Tasmania. Water levels declined in both lakes during the mid Holocene, with a more substantive decline after ~5 ka which coincides with the end of the Southern Hemisphere hypsithermal. Water levels continued to oscillate with a periodicity of around 300-700 years, before reaching a late-Holocene nadir around 1.8 ka (Keilambete) and 1.3 ka (Gnotuk). The trend and periodicity of oscillations in the maar water levels show commonalities to dD in the Dome C ice core, and suggest that temperature may be a significant component in influencing the Precipitation/Evaporation (P/E) ratio in southeastern Australia during the Holocene. #--------------------------------------- # Publication # Authors: Daniel Wilkins, Patrick De Deckker, L. Keith Fifield, Chris Gouramanis, Jon Olley # Published_Date_or_Year: 2012-06-01 # Published_Title: Comparative optical and radiocarbon dating of laminated Holocene sediments in two maar lakes: Lake Keilambete and Lake Gnotuk, south-western Victoria, Australia # Journal_Name: Quaternary Geochronology # Volume: 9 # Edition: # Issue: # Pages: 3-15 # Report Number: # DOI: 10.1016/j.quageo.2012.01.008 # Online_Resource: http://www.sciencedirect.com/science/article/pii/S1871101412000106 # Full_Citation: # Abstract: Sediment core chronologies of optical dates on single-grains/very small aliquots of sand-sized quartz are compared with Accelerator Mass Spectrometry (AMS) radiocarbon (14C) chronologies from ostracod carbonate, mixed carbonates, sedimentary organic matter and charcoal in order to establish the age of laminated Holocene sediments in maar crater lakes Keilambete and Gnotuk, Victoria, Australia. Samples for optical and AMS 14C dating were taken from the same Mackereth cores, allowing a direct comparison of the two techniques from two laminated sedimentary sequences. Additional AMS 14C samples were taken from water in Lake Keilambete and from groundwater discharging into Lake Keilambete from the crater wall, with equivalent reservoir ages of 150 ± 30 and 1940 ± 30 years respectively. AMS 14C dating of modern ostracod carbonate in Lake Keilambete demonstrates a reservoir age of 670 ± 175 years. Optical dating of 'single-grain/very small aliquots' of sand-sized-quartz indicate the presence of a radiocarbon reservoir in Lake Keilambete that is consistent with that measured on modern ostracods, and also demonstrate that there is no 14C reservoir in Lake Gnotuk during the Holocene. The chronology presented here supports the premise that previously published bulk conventional 14C dates from Lake Keilambete were affected by old carbon, meaning that past chronologies require revision. Limitations on the use of optical dating of single-grain/very small aliquots include the relative paucity of sand-sized quartz, which decreases the precision of the sample equivalent dose (De), and is further confounded by low environmental dose rates and resultant large uncertainties on the final age assessment. Nevertheless, evidence for partial bleaching confirms that single-grain quartz dating is the most appropriate luminescence technique, and may prove a useful alternative in situations where 14C dating is unsuitable or an alternative chronometer is required. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Australian Research Council # Grant: DP034493 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Commonwealth Scientific and Industrial Research Organisation (CSIRO) # Grant: Land and Water scholarship #--------------------------------------- # Site Information # Site_Name: Lake Keilambete # Location: Australia/New Zealand>Australia # Country: Australia # Northernmost_Latitude: -38.207 # Southernmost_Latitude: -38.207 # Easternmost_Longitude: 142.878 # Westernmost_Longitude: 142.878 # Elevation: 120 m #--------------------------------------- # Data_Collection # Collection_Name: Keil01MS # First_Year: 8663 # Last_Year: 52 # Time_Unit: cal. yr BP # Core_Length: 334cm # Notes: Density and Magnetic Susceptibility data from Lake Keilambete core Keil01 #--------------------------------------- # Chronology_Information # Chronology: # # Lab ID ANUA-36023 ANUA-34203 ANUA-34204 ANUA-36024 ANUA-34205 ANUA-35105 ANUA-34206 ANUA-35106 ANUA-35107 ANUA-36013 ANUA-35108 ANUA-34208 ANUA-35109 ANUA-34207 # Dated material ostracod foraminifera ostracod ostracod ostracod ostracod ostracod gyttja gyttja gyttja charcoal ostracod foraminifera ostracod # depth_bot (cm) 17 52.3 78 101 129 145 164 208 258 295 337 363 388 # depth_top (cm) modern 16 51.8 77 99 128 143 163 207 257 294 336 362 386 # age (bp) # age14C (bp) 750 1755 1815 2940 3730 4000 4200 5470 5300 6460 7310 8720 9370 # age_error (years) 170 170 175 190 175 170 180 180 270 210 185 185 175 # calibrated age (cal BP) # 2-sigma error of cal age (years) # cal_age_range_old (bp) 160 1100 1185 2380 3380 3725 3975 5705 5490 7510 7625 9100 9920 # cal_age_range_young (2_s) -4 765 895 1945 2960 3325 3550 5280 4890 7150 7300 8600 9470 # notes modern sample 1s age range includes 670±175 yr reservoir 1s age range includes 670±175 yr reservoir 1s age range includes 670±175 yr reservoir 1s age range includes 670±175 yr reservoir 1s age range includes 670±175 yr reservoir 1s age range includes 670±175 yr reservoir 1s age range includes 670±175 yr reservoir 1s age range includes 670±175 yr reservoir 1s age range includes 670±175 yr reservoir 1s age range 1s age range includes 670±175 yr reservoir 1s age range includes 670±175 yr reservoir 1s age range includes 670±175 yr reservoir # # OSL Dates # Core depth_top_cm depth_bot_cm Age (YBP) small error*a large error*b # KEIL02 2 4 240 0.06 0.07 # KEIL02 6 8 370 0.17 0.24 # KEIL02 24 26 800 0.14 0.19 # KEIL02 73 75 1880 0.37 0.38 # KEIL02 119 121 2610 0.31 0.33 # KEIL02 142 144 3380 0.43 0.52 # KEIL02 166 168 4190 0.46 0.51 # KEIL02 192 194 5320 0.5 0.58 # KEIL02 211 213 5480 0.51 0.59 # KEIL02 230 232 6280 0.57 0.66 # KEIL02 249 251 6290 0.56 0.66 # KEIL02 291 293 7850 0.75 0.94 # KEIL02 336 338 7750 0.63 0.75 # KEIL02 386 388 9690 1.56 2.12 # # *a small error incorporates random uncertainty and 2.5% uncertainty associated with equivalent dose measurement # *b large error incorporates all systematic and random uncertainties # #--------------------------------------- # Variables # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ## depth_cm depth, , , cm, , , , ,N, ## depth_eq Equivalent depth,,,cm,,,Equivalent depths between cores extracted from the same lake,laminae sequences used to correlate depths between cores,N, ## age_calBP age, , , calendar years before present, , , , ,N, ## dens Density,Sediment,,g/cm3,,paleolimnology,,gamma-ray attenuation; multi-sensor core logger,N, ## susc Magnetic Susceptibility,Sediment,,electromagnetic cgs units,,paleolimnology,,multi-sensor core logger,N, # #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: NA # depth_cm depth_eq age_calBP dens susc 1 4.8 52 NA 7.54 2 5.7 75 NA 11.14 3 6.6 97 NA 16.74 4 7.5 120 NA 24.34 5 8.4 142 NA 31.94 6 9.3 165 1.30 37.14 7 10.3 187 1.30 37.94 8 11.2 210 1.29 36.34 9 12.1 233 1.21 33.14 10 13.0 255 1.18 29.94 11 13.9 278 1.24 28.34 12 14.8 301 1.19 27.14 13 15.8 323 1.17 27.14 14 16.7 346 1.18 27.54 15 17.6 369 1.16 27.94 16 18.5 392 1.10 27.94 17 19.5 414 1.12 29.14 18 20.4 437 1.11 29.54 19 21.3 460 1.10 31.14 20 22.2 483 1.08 32.74 21 23.1 506 1.10 36.34 22 24.1 529 1.13 40.74 23 25.0 552 1.12 45.54 24 25.9 574 1.13 49.54 25 26.9 597 1.13 52.34 26 27.8 620 1.12 54.74 27 28.7 643 1.13 56.74 28 29.7 666 1.13 59.14 29 30.6 689 1.17 60.74 30 31.5 712 1.17 61.14 31 32.5 736 1.16 59.94 32 33.4 759 1.18 58.74 33 34.3 782 1.16 57.94 34 35.3 805 1.16 56.74 35 36.2 828 1.17 54.74 36 37.1 851 1.14 53.54 37 38.1 874 1.15 51.94 38 39.0 898 1.20 51.94 39 39.9 921 1.14 52.34 40 40.9 944 1.15 53.14 41 41.8 967 1.14 52.34 42 42.8 991 1.15 49.94 43 43.7 1014 1.15 46.34 44 44.7 1037 1.13 40.74 45 45.6 1061 1.17 35.54 46 46.6 1084 1.17 31.14 47 47.5 1107 1.13 27.54 48 48.4 1131 1.19 25.14 49 49.4 1154 1.19 23.14 50 50.3 1178 1.14 21.14 51 51.3 1201 1.11 19.54 52 52.2 1224 1.10 17.14 53 53.2 1248 1.12 14.34 54 54.1 1271 1.16 12.34 55 55.1 1295 1.08 10.74 56 56.1 1319 1.17 10.34 57 57.0 1342 1.20 10.34 58 58.0 1366 1.15 10.34 59 58.9 1389 1.08 10.74 60 59.9 1413 1.11 10.74 61 60.8 1437 1.15 11.54 62 61.8 1460 1.21 11.94 63 62.8 1484 1.25 13.54 64 63.7 1508 1.23 15.54 65 64.7 1531 1.29 17.54 66 65.6 1555 1.26 18.34 67 66.6 1579 NA 18.34 68 67.6 1603 1.13 17.54 69 68.5 1627 1.11 15.94 70 69.5 1650 1.12 13.54 71 70.5 1674 1.08 11.14 72 71.4 1698 1.02 8.74 73 72.4 1722 1.01 6.74 74 73.4 1746 1.03 5.54 75 74.3 1770 1.06 5.14 76 75.3 1794 1.09 4.74 77 76.3 1818 1.11 4.34 78 77.2 1842 1.08 4.34 79 78.2 1866 1.10 4.34 80 79.2 1890 1.09 4.34 81 80.2 1914 1.08 5.14 82 81.1 1938 1.08 5.14 83 82.1 1962 1.08 5.54 84 83.1 1986 1.07 5.94 85 84.1 2010 1.11 5.94 86 85.0 2035 1.12 6.74 87 86.0 2059 1.17 6.74 88 87.0 2083 1.11 7.14 89 88.0 2107 1.09 7.54 90 89.0 2131 1.10 8.34 91 89.9 2156 1.10 9.94 92 90.9 2180 1.12 11.14 93 91.9 2204 1.11 11.94 94 92.9 2228 1.08 11.54 95 93.9 2253 1.04 11.14 96 94.9 2277 1.04 11.14 97 95.9 2302 1.11 11.14 98 96.8 2326 1.09 11.54 99 97.8 2350 NA 12.34 100 98.8 2375 NA 12.74 101 99.8 2399 1.11 13.94 102 100.8 2424 1.10 15.14 103 101.8 2448 1.09 15.54 104 102.8 2473 1.11 15.94 105 103.8 2497 1.10 14.74 106 104.8 2522 1.11 16.34 107 105.8 2546 1.11 15.54 108 106.8 2571 1.08 14.74 109 107.8 2595 1.07 13.14 110 108.7 2620 1.10 12.74 111 109.7 2645 1.09 12.34 112 110.7 2669 1.11 11.94 113 111.7 2694 1.13 11.94 114 112.7 2719 1.18 13.14 115 113.7 2744 1.18 15.14 116 114.7 2768 1.15 16.74 117 115.8 2793 1.15 17.94 118 116.8 2818 1.17 18.74 119 117.8 2843 1.15 17.94 120 118.8 2867 1.12 15.54 121 119.8 2892 1.10 12.34 122 120.8 2917 1.09 10.74 123 121.8 2942 1.08 9.54 124 122.8 2967 1.07 9.14 125 123.8 2992 1.11 9.14 126 124.8 3017 1.10 9.54 127 125.8 3042 1.10 9.94 128 126.8 3067 1.08 9.94 129 127.8 3092 1.07 10.34 130 128.9 3117 1.09 10.34 131 129.9 3142 1.08 10.34 132 130.9 3167 1.10 10.34 133 131.9 3192 1.12 10.74 134 132.9 3217 1.12 11.14 135 133.9 3242 1.08 11.54 136 135.0 3267 1.09 12.34 137 136.0 3292 1.08 12.74 138 137.0 3318 1.10 13.54 139 138.0 3343 1.11 14.74 140 139.0 3368 1.11 15.14 141 140.1 3393 1.11 15.94 142 141.1 3419 1.12 15.54 143 142.1 3444 1.13 15.14 144 143.1 3469 1.12 13.54 145 144.1 3494 1.14 11.14 146 145.2 3520 1.10 9.54 147 146.2 3545 1.10 7.94 148 147.2 3571 1.11 7.14 149 148.3 3596 1.01 7.54 150 149.3 3621 1.09 8.74 151 150.3 3647 1.07 10.34 152 151.3 3672 1.09 11.54 153 152.4 3698 1.06 13.54 154 153.4 3723 1.04 15.14 155 154.4 3749 1.05 16.74 156 155.5 3774 1.05 17.14 157 156.5 3800 1.06 17.14 158 157.5 3825 0.98 16.34 159 158.6 3851 0.94 15.54 160 159.6 3877 1.02 15.54 161 160.7 3902 1.10 16.34 162 161.7 3928 1.10 17.94 163 162.7 3954 1.10 19.94 164 163.8 3979 1.06 21.54 165 164.8 4005 1.01 23.54 166 165.9 4031 1.00 24.74 167 166.9 4056 0.99 25.54 168 167.9 4082 1.09 25.94 169 169.0 4108 1.06 25.94 170 170.0 4134 1.06 25.94 171 171.1 4160 1.05 26.74 172 172.1 4185 1.03 27.54 173 173.2 4211 1.06 28.74 174 174.2 4237 1.08 31.14 175 175.3 4263 1.10 33.94 176 176.3 4289 1.11 35.94 177 177.4 4315 1.07 36.74 178 178.4 4341 1.09 37.14 179 179.5 4367 1.09 36.74 180 180.5 4393 1.09 36.74 181 181.6 4419 1.10 36.34 182 182.6 4445 1.10 36.34 183 183.7 4471 1.11 35.94 184 184.7 4497 1.07 34.74 185 185.8 4523 1.08 33.54 186 186.9 4549 1.13 32.34 187 187.9 4576 1.12 30.34 188 189.0 4602 1.10 27.94 189 190.0 4628 1.07 25.14 190 191.1 4654 1.07 23.14 191 192.2 4680 1.09 21.54 192 193.2 4707 1.14 21.14 193 194.3 4733 1.13 21.14 194 195.4 4759 1.12 22.34 195 196.4 4786 1.13 23.94 196 197.5 4812 1.15 26.34 197 198.6 4838 1.17 28.34 198 199.6 4865 1.16 30.34 199 200.7 4891 1.16 31.54 200 201.8 4917 NA 32.74 201 202.8 4944 1.13 34.74 202 203.9 4970 1.15 37.54 203 205.0 4997 1.13 40.34 204 206.0 5023 1.14 43.54 205 207.1 5050 1.15 45.54 206 208.2 5076 1.16 46.34 207 209.3 5103 NA 45.54 208 210.3 5129 1.11 42.74 209 211.4 5156 1.07 39.14 210 212.5 5182 1.10 37.14 211 213.6 5209 1.12 35.94 212 214.6 5236 1.11 35.94 213 215.7 5262 1.11 36.34 214 216.8 5289 1.12 35.54 215 217.9 5316 1.09 33.54 216 219.0 5343 1.07 31.54 217 220.1 5369 1.09 30.34 218 221.1 5396 1.13 30.34 219 222.2 5423 1.14 30.34 220 223.3 5450 1.12 30.34 221 224.4 5476 NA 30.74 222 225.5 5503 NA 31.54 223 226.6 5530 1.13 33.14 224 227.7 5557 NA 34.74 225 228.7 5584 1.10 35.54 226 229.8 5611 1.10 35.94 227 230.9 5638 1.10 35.94 228 232.0 5665 1.11 36.34 229 233.1 5692 1.11 36.74 230 234.2 5719 1.11 37.94 231 235.3 5746 1.13 39.94 232 236.4 5773 1.15 42.74 233 237.5 5800 1.16 45.94 234 238.6 5827 1.18 49.14 235 239.7 5854 1.16 50.34 236 240.8 5881 1.13 49.54 237 241.9 5908 1.11 48.34 238 243.0 5935 1.11 47.94 239 244.1 5963 1.14 48.74 240 245.2 5990 1.15 50.34 241 246.3 6017 1.13 52.74 242 247.4 6044 1.14 53.14 243 248.5 6071 1.13 52.74 244 249.6 6099 1.12 51.14 245 250.7 6126 1.13 48.74 246 251.8 6153 1.13 46.34 247 252.9 6181 NA 44.74 248 254.0 6208 1.13 43.14 249 255.1 6235 1.11 42.74 250 256.2 6263 1.12 42.34 251 257.3 6290 1.11 41.94 252 258.4 6318 1.12 41.14 253 259.6 6345 1.10 39.94 254 260.7 6373 1.10 37.94 255 261.8 6400 1.11 35.94 256 262.9 6428 1.14 34.74 257 264.0 6455 1.13 33.54 258 265.1 6483 1.12 33.14 259 266.2 6510 1.11 33.54 260 267.4 6538 1.12 34.34 261 268.5 6565 1.11 35.94 262 269.6 6593 1.12 37.94 263 270.7 6621 1.11 40.74 264 271.8 6648 1.12 43.94 265 273.0 6676 1.10 46.34 266 274.1 6704 1.08 47.94 267 275.2 6731 1.08 49.14 268 276.3 6759 1.11 51.54 269 277.4 6787 1.10 52.74 270 278.6 6815 1.08 53.14 271 279.7 6843 1.11 51.54 272 280.8 6870 1.10 49.94 273 282.0 6898 1.07 47.54 274 283.1 6926 1.09 45.54 275 284.2 6954 1.08 44.74 276 285.3 6982 1.07 43.94 277 286.5 7010 1.07 44.34 278 287.6 7038 1.10 45.14 279 288.7 7066 1.09 46.34 280 289.9 7094 1.12 47.54 281 291.0 7122 1.03 47.94 282 292.1 7150 1.09 47.14 283 293.3 7178 1.11 46.74 284 294.4 7206 1.09 45.14 285 295.5 7234 1.02 43.54 286 296.7 7262 NA 41.94 287 297.8 7290 1.06 39.94 288 299.0 7318 1.03 38.34 289 300.1 7346 1.09 37.14 290 301.2 7375 1.01 35.54 291 302.4 7403 1.05 34.34 292 303.5 7431 1.07 33.94 293 304.7 7459 1.07 33.94 294 305.8 7488 1.10 33.94 295 307.0 7516 1.11 33.94 296 308.1 7544 1.12 33.94 297 309.3 7572 1.08 33.14 298 310.4 7601 1.08 31.94 299 311.5 7629 1.11 31.54 300 312.7 7658 1.11 31.54 301 313.8 7686 1.13 31.14 302 315.0 7714 1.12 33.14 303 316.1 7743 1.12 33.54 304 317.3 7771 NA 33.54 305 318.5 7800 NA 34.34 306 319.6 7828 1.14 37.54 307 320.8 7857 1.16 43.94 308 321.9 7885 1.22 52.34 309 323.1 7914 NA 62.74 310 324.2 7942 1.09 69.94 311 325.4 7971 1.10 71.54 312 326.5 8000 1.10 67.54 313 327.7 8028 1.07 59.14 314 328.9 8057 1.03 48.34 315 330.0 8086 1.06 36.74 316 331.2 8114 1.07 26.34 317 332.4 8143 NA 19.54 318 333.5 8172 1.09 15.14 319 334.7 8201 1.17 12.34 320 335.8 8229 1.17 11.14 321 337.0 8258 1.13 10.74 322 338.2 8287 0.97 11.54 323 339.3 8316 1.15 12.34 324 340.5 8345 1.05 12.74 325 341.7 8373 1.13 12.34 326 342.8 8402 1.15 11.54 327 344.0 8431 1.15 11.54 328 345.2 8460 1.13 12.34 329 346.4 8489 1.17 13.54 330 347.5 8518 1.20 15.94 331 348.7 8547 1.16 20.34 332 349.9 8576 1.06 25.94 333 351.1 8605 1.07 32.34 334 352.2 8634 1.08 37.14 335 353.4 8663 1.04 37.14