# 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/keilambete2013lam.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: Keil02Lam # First_Year: 9480 # Last_Year: -53 # Time_Unit: cal. yr BP # Core_Length: 389cm # Notes: Laminae frequency data from Lake Keilambete core Keil02 #--------------------------------------- # 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_top_cm depth, , , cm, , , Top Depth of Sample, ,N, ## depth_bot_cm depth, , , cm, , , Bottom Depth of Sample, ,N, ## depth_cm depth, , , cm, , , Midpoint Depth of Sample, ,N, ## age_calBP age, , , calendar years before present, , , , ,N, ## lam/cm number of laminae within a one centimeter interval,Sediment,,NA,,paleolimnology,,,N, # #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: NA depth_top_cm depth_bot_cm depth_cm age_calBP lam/cm 0 1 0.5 -53.65 2 1 2 1.5 -28.95 2 2 3 2.5 -4.25 1 3 4 3.5 20.45 3 4 5 4.5 45.15 4 5 6 5.5 69.85 3 6 7 6.5 94.55 4 7 8 7.5 119.25 7 8 9 8.5 143.95 6 9 10 9.5 168.65 4 10 11 10.5 193.35 3 11 12 11.5 218.05 3 12 13 12.5 242.75 4 13 14 13.5 267.45 5 14 15 14.5 292.15 4 15 16 15.5 316.85 5 16 17 16.5 341.55 6 17 18 17.5 366.25 6 18 19 18.5 390.95 3 19 20 19.5 415.65 4 20 21 20.5 440.35 4 21 22 21.5 465.05 6 22 23 22.5 489.75 7 23 24 23.5 514.45 8 24 25 24.5 539.15 8 25 26 25.5 563.85 14 26 27 26.5 588.55 15 27 28 27.5 613.25 10 28 29 28.5 637.95 10 29 30 29.5 662.65 13 30 31 30.5 687.35 15 31 32 31.5 712.05 14 32 33 32.5 736.75 13 33 34 33.5 761.45 18 34 35 34.5 786.15 15 35 36 35.5 810.85 13 36 37 36.5 835.55 14 37 38 37.5 860.25 18 38 39 38.5 884.95 22 39 40 39.5 909.65 18 40 41 40.5 934.35 25 41 42 41.5 959.05 40 42 43 42.5 983.75 30 43 44 43.5 1008.45 31 44 45 44.5 1033.15 30 45 46 45.5 1057.85 26 46 47 46.5 1082.55 28 47 48 47.5 1107.25 31 48 49 48.5 1131.95 24 49 50 49.5 1156.65 21 50 51 50.5 1181.35 20 51 52 51.5 1206.05 15 52 53 52.5 1230.75 12 53 54 53.5 1255.45 8 54 55 54.5 1280.15 9 55 56 55.5 1304.85 6 56 57 56.5 1329.55 6 57 58 57.5 1354.25 16 58 59 58.5 1378.95 11 59 60 59.5 1403.65 7 60 61 60.5 1428.35 5 61 62 61.5 1453.05 2 62 63 62.5 1477.75 5 63 64 63.5 1502.45 9 64 65 64.5 1527.15 4 65 66 65.5 1551.85 6 66 67 66.5 1576.55 11 67 68 67.5 1601.25 11 68 69 68.5 1625.95 12 69 70 69.5 1650.65 11 70 71 70.5 1675.35 8 71 72 71.5 1700.05 4 72 73 72.5 1724.75 4 73 74 73.5 1749.45 6 74 75 74.5 1774.15 6 75 76 75.5 1798.85 8 76 77 76.5 1823.55 5 77 78 77.5 1848.25 8 78 79 78.5 1872.95 7 79 80 79.5 1897.65 8 80 81 80.5 1922.35 4 81 82 81.5 1947.05 7 82 83 82.5 1971.75 8 83 84 83.5 1996.45 9 84 85 84.5 2021.15 7 85 86 85.5 2045.85 7 86 87 86.5 2070.55 4 87 88 87.5 2095.25 9 88 89 88.5 2119.95 4 89 90 89.5 2144.65 8 90 91 90.5 2169.35 7 91 92 91.5 2194.05 13 92 93 92.5 2218.75 2 93 94 93.5 2243.45 5 94 95 94.5 2268.15 2 95 96 95.5 2292.85 6 96 97 96.5 2317.55 9 97 98 97.5 2342.25 5 98 99 98.5 2366.95 8 99 100 99.5 2391.65 14 100 101 100.5 2416.35 10 101 102 101.5 2441.05 10 102 103 102.5 2465.75 13 103 104 103.5 2490.45 21 104 105 104.5 2515.15 21 105 106 105.5 2539.85 19 106 107 106.5 2564.55 9 107 108 107.5 2589.25 4 108 109 108.5 2613.95 6 109 110 109.5 2638.65 5 110 111 110.5 2663.35 6 111 112 111.5 2688.05 6 112 113 112.5 2712.75 9 113 114 113.5 2737.45 6 114 115 114.5 2762.15 6 115 116 115.5 2786.85 12 116 117 116.5 2811.55 7 117 118 117.5 2836.25 3 118 119 118.5 2860.95 10 119 120 119.5 2885.65 5 120 121 120.5 2910.35 7 121 122 121.5 2935.05 8 122 123 122.5 2959.75 8 123 124 123.5 2984.45 13 124 125 124.5 3009.15 12 125 126 125.5 3033.85 21 126 127 126.5 3058.55 20 127 128 127.5 3083.25 12 128 129 128.5 3107.95 17 129 130 129.5 3132.65 12 130 131 130.5 3157.35 5 131 132 131.5 3182.05 11 132 133 132.5 3206.75 20 133 134 133.5 3231.45 13 134 135 134.5 3256.15 26 135 136 135.5 3280.85 28 136 137 136.5 3305.55 31 137 138 137.5 3330.25 29 138 139 138.5 3354.95 27 139 140 139.5 3379.65 21 140 141 140.5 3404.35 23 141 142 141.5 3429.05 12 142 143 142.5 3453.75 9 143 144 143.5 3478.45 8 144 145 144.5 3503.15 11 145 146 145.5 3527.85 9 146 147 146.5 3552.55 21 147 148 147.5 3577.25 16 148 149 148.5 3601.95 15 149 150 149.5 3626.65 14 150 151 150.5 3651.35 13 151 152 151.5 3676.05 19 152 153 152.5 3700.75 27 153 154 153.5 3725.45 15 154 155 154.5 3750.15 22 155 156 155.5 3774.85 17 156 157 156.5 3799.55 19 157 158 157.5 3824.25 16 158 159 158.5 3848.95 24 159 160 159.5 3873.65 20 160 161 160.5 3898.35 24 161 162 161.5 3923.05 17 162 163 162.5 3947.75 24 163 164 163.5 3972.45 20 164 165 164.5 3997.15 20 165 166 165.5 4021.85 17 166 167 166.5 4046.55 19 167 168 167.5 4071.25 19 168 169 168.5 4095.95 24 169 170 169.5 4120.65 12 170 171 170.5 4145.35 3 171 172 171.5 4170.05 2 172 173 172.5 4194.75 1 173 174 173.5 4219.45 2 174 175 174.5 4244.15 2 175 176 175.5 4268.85 0 176 177 176.5 4293.55 0 177 178 177.5 4318.25 0 178 179 178.5 4342.95 0 179 180 179.5 4367.65 1 180 181 180.5 4392.35 7 181 182 181.5 4417.05 19 182 183 182.5 4441.75 17 183 184 183.5 4466.45 15 184 185 184.5 4491.15 20 185 186 185.5 4515.85 21 186 187 186.5 4540.55 6 187 188 187.5 4565.25 3 188 189 188.5 4589.95 0 189 190 189.5 4614.65 1 190 191 190.5 4639.35 3 191 192 191.5 4664.05 19 192 193 192.5 4688.75 22 193 194 193.5 4713.45 39 194 195 194.5 4738.15 14 195 196 195.5 4762.85 17 196 197 196.5 4787.55 3 197 198 197.5 4812.25 2 198 199 198.5 4836.95 1 199 200 199.5 4861.65 2 200 201 200.5 4886.35 18 201 202 201.5 4911.05 17 202 203 202.5 4935.75 18 203 204 203.5 4960.45 25 204 205 204.5 4985.15 21 205 206 205.5 5009.85 18 206 207 206.5 5034.55 17 207 208 207.5 5059.25 9 208 209 208.5 5083.95 16 209 210 209.5 5108.65 2 210 211 210.5 5133.35 2 211 212 211.5 5158.05 6 212 213 212.5 5182.75 10 213 214 213.5 5207.45 2 214 215 214.5 5232.15 3 215 216 215.5 5256.85 5 216 217 216.5 5281.55 1 217 218 217.5 5306.25 3 218 219 218.5 5330.95 3 219 220 219.5 5355.65 3 220 221 220.5 5380.35 2 221 222 221.5 5405.05 2 222 223 222.5 5429.75 3 223 224 223.5 5454.45 2 224 225 224.5 5479.15 0 225 226 225.5 5503.85 0 226 227 226.5 5528.55 0 227 228 227.5 5553.25 3 228 229 228.5 5577.95 2 229 230 229.5 5602.65 2 230 231 230.5 5627.35 2 231 232 231.5 5652.05 1 232 233 232.5 5676.75 2 233 234 233.5 5701.45 2 234 235 234.5 5726.15 2 235 236 235.5 5750.85 0 236 237 236.5 5775.55 2 237 238 237.5 5800.25 2 238 239 238.5 5824.95 2 239 240 239.5 5849.65 0 240 241 240.5 5874.35 0 241 242 241.5 5899.05 0 242 243 242.5 5923.75 0 243 244 243.5 5948.45 0 244 245 244.5 5973.15 0 245 246 245.5 5997.85 1 246 247 246.5 6022.55 1 247 248 247.5 6047.25 2 248 249 248.5 6071.95 2 249 250 249.5 6096.65 2 250 251 250.5 6121.35 3 251 252 251.5 6146.05 0 252 253 252.5 6170.75 2 253 254 253.5 6195.45 2 254 255 254.5 6220.15 2 255 256 255.5 6244.85 1 256 257 256.5 6269.55 2 257 258 257.5 6294.25 1 258 259 258.5 6318.95 2 259 260 259.5 6343.65 2 260 261 260.5 6368.35 2 261 262 261.5 6393.05 2 262 263 262.5 6417.75 2 263 264 263.5 6442.45 2 264 265 264.5 6467.15 2 265 266 265.5 6491.85 2 266 267 266.5 6516.55 1 267 268 267.5 6541.25 3 268 269 268.5 6565.95 2 269 270 269.5 6590.65 2 270 271 270.5 6615.35 2 271 272 271.5 6640.05 2 272 273 272.5 6664.75 1 273 274 273.5 6689.45 2 274 275 274.5 6714.15 2 275 276 275.5 6738.85 2 276 277 276.5 6763.55 2 277 278 277.5 6788.25 1 278 279 278.5 6812.95 2 279 280 279.5 6837.65 1 280 281 280.5 6862.35 3 281 282 281.5 6887.05 2 282 283 282.5 6911.75 1 283 284 283.5 6936.45 0 284 285 284.5 6961.15 1 285 286 285.5 6985.85 1 286 287 286.5 7010.55 0 287 288 287.5 7035.25 0 288 289 288.5 7059.95 0 289 290 289.5 7084.65 1 290 291 290.5 7109.35 0 291 292 291.5 7134.05 0 292 293 292.5 7158.75 2 293 294 293.5 7183.45 6 294 295 294.5 7208.15 5 295 296 295.5 7232.85 10 296 297 296.5 7257.55 21 297 298 297.5 7282.25 17 298 299 298.5 7306.95 19 299 300 299.5 7331.65 15 300 301 300.5 7356.35 14 301 302 301.5 7381.05 18 302 303 302.5 7405.75 17 303 304 303.5 7430.45 11 304 305 304.5 7455.15 7 305 306 305.5 7479.85 7 306 307 306.5 7504.55 10 307 308 307.5 7529.25 9 308 309 308.5 7553.95 10 309 310 309.5 7578.65 11 310 311 310.5 7603.35 12 311 312 311.5 7628.05 10 312 313 312.5 7652.75 10 313 314 313.5 7677.45 9 314 315 314.5 7702.15 7 315 316 315.5 7726.85 3 316 317 316.5 7751.55 14 317 318 317.5 7776.25 3 318 319 318.5 7800.95 3 319 320 319.5 7825.65 2 320 321 320.5 7850.35 3 321 322 321.5 7875.05 8 322 323 322.5 7899.75 12 323 324 323.5 7924.45 4 324 325 324.5 7949.15 3 325 326 325.5 7973.85 3 326 327 326.5 7998.55 8 327 328 327.5 8023.25 4 328 329 328.5 8047.95 2 329 330 329.5 8072.65 0 330 331 330.5 8097.35 0 331 332 331.5 8122.05 0 332 333 332.5 8146.75 0 333 334 333.5 8171.45 2 334 335 334.5 8196.15 3 335 336 335.5 8220.85 6 336 337 336.5 8245.55 4 337 338 337.5 8270.25 2 338 339 338.5 8294.95 2 339 340 339.5 8319.65 2 340 341 340.5 8344.35 2 341 342 341.5 8369.05 6 342 343 342.5 8393.75 2 343 344 343.5 8418.45 2 344 345 344.5 8443.15 1 345 346 345.5 8467.85 1 346 347 346.5 8492.55 2 347 348 347.5 8517.25 5 348 349 348.5 8541.95 2 349 350 349.5 8566.65 1 350 351 350.5 8591.35 2 351 352 351.5 8616.05 2 352 353 352.5 8640.75 2 353 354 353.5 8665.45 4 354 355 354.5 8690.15 4 355 356 355.5 8714.85 4 356 357 356.5 8739.55 10 357 358 357.5 8764.25 5 358 359 358.5 8788.95 4 359 360 359.5 8813.65 1 360 361 360.5 8838.35 4 361 362 361.5 8863.05 3 362 363 362.5 8887.75 7 363 364 363.5 8912.45 4 364 365 364.5 8937.15 5 365 366 365.5 8961.85 5 366 367 366.5 8986.55 5 367 368 367.5 9011.25 8 368 369 368.5 9035.95 7 369 370 369.5 9060.65 4 370 371 370.5 9085.35 7 371 372 371.5 9110.05 3 372 373 372.5 9134.75 1 373 374 373.5 9159.45 2 374 375 374.5 9184.15 2 375 376 375.5 9208.85 5 376 377 376.5 9233.55 10 377 378 377.5 9258.25 5 378 379 378.5 9282.95 9 379 380 379.5 9307.65 6 380 381 380.5 9332.35 9 381 382 381.5 9357.05 9 382 383 382.5 9381.75 5 383 384 383.5 9406.45 8 384 385 384.5 9431.15 10 385 386 385.5 9455.85 2 386 387 386.5 9480.55 4