# Western Kentucky LGM Peoria Loess Gastropod Data and July Temperature #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # NOTE: Please cite original publication, online resource and date accessed when using this data. # If there is no publication information, please cite Investigator, title, online resource and date accessed. # # Description/Documentation lines begin with # # Data lines have no # # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/34072 # Description: NOAA Landing Page # Online_Resource: https://www.ncei.noaa.gov/pub/data/paleo/loess/peoria/rocks2020-iso-disc-heli.txt # Description: NOAA location of the template # # Data_Type: Loess # # Dataset_DOI: # # Parameter_Keywords: #--------------------------------------- # Contribution_Date # Date: 2021-08-31 #--------------------------------------- # File_Last_Modified_Date # Date: 2021-08-31 #--------------------------------------- # Title # Study_Name: Western Kentucky LGM Peoria Loess Gastropod Data and July Temperature #--------------------------------------- # Investigators # Investigators: Grimley, D.A.; Counts, R.C.; Conroy, J.L.; Wang, H.; Dendy, S.N.; Nield, C.B. #--------------------------------------- # Description_Notes_and_Keywords # Description: Terrestrial gastropod assemblage and stable isotope (d13C, d18O) data and July temperature estimates from Peoria Loess of The Rocks section, western Kentucky, for the Last Glacial Maximum (~30-24ka). # Provided Keywords: gastropods, terrestrial, radiocarbon, isotopes # # basis for H. parallelus data correction (compared with D. whitneyi) # Dept (cm) d13CVPDB corrected d13CVPDB d18OVPDB* corrected d18OVPDB* d13C difference -0.5 d18O difference -0.4 # 507.5 duplicates averaged -7.0 -6.5 -0.6 -0.2 -0.2 -0.1 # 512.5 -7.6 -7.1 0.7 1.1 -0.7 0.8 # 532.5 -8.4 -7.9 -0.8 -0.4 -1.0 -1.6 # 572.5 -7.2 -6.7 -1.0 -0.6 0.0 -0.6 # # for correction: added 0.4 to H. parallelus d18O values and 0.5 to H. parallelus d13C values # # Discus data only shown for depths 5.075, 5.125, 5.325, 5.725 #--------------------------------------- # Publication # Authors: David A. Grimley, Ronald C. Counts, Jessica L. Conroy, Hong Wang, Sarah N. Dendy, Catherine B. Nield # Published_Date_or_Year: 2020-07-01 # Published_Title: Last glacial maximum ecology and climate from terrestrial gastropod assemblages in Peoria loess, western Kentucky # Journal_Name: Journal of Quaternary Science # Volume: 35 # Edition: # Issue: 5 # Pages: 650-663 # Report_Number: # DOI: 10.1002/jqs.3206 # Online_Resource: https://onlinelibrary.wiley.com/doi/10.1002/jqs.3206 # Full_Citation: # Abstract: The Rocks loess section, in unglaciated western Kentucky, provides a high-resolution environmental record during the last glacial maximum onset. The Peoria Silt (9 m thick) contains 26 terrestrial gastropod species, with up to 15 species within a single 5 cm interval. Thirteen radiocarbon ages, using shells or charcoal, range between 30 and 24.5 cal ka; younger loess has been leached or eroded. Stratigraphic shifts in gastropod assemblages imply significant cooling, particularly ~27 cal ka, as solar insolation was decreasing and the southern Laurentide Ice Sheet rapidly advancing. Midwestern to southern species (e.g. Anguispira kochi, Gastrocopta pentodon, Hawaii miniscula, Helicodiscus parallelus, Vallonia perspectiva) occur only in the lowermost Peoria Silt (~30-27 cal ka). In contrast, cold-tolerant species (Columella alticola, Vertigo modesta, Vallonia gracilicosta) occur only in full glacial Peoria Silt (27-24.5 cal ka). Inferred mean July temperatures, from mutual climatic range methods, range from ~23C at 30 cal ka, cooling to ~18C by 26 cal ka; about 3-8C cooler than today (~26C). Superimposed on this cooling trend are multi-centennial variations in detrital carbonate, fossil shell concentrations, palaeotemperature estimates, and oxygen isotope values (Vertigo, Discus, Helicodiscus). The finer-scale variations imply relatively synchronous fluctuations in glacial sediment supply, loess sedimentation, and climate. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: NSF-GLD 16-37481 #--------------------------------------- # Site_Information # Site_Name: Rocks Section # Location: North America>United States Of America>Kentucky # Northernmost_Latitude: 37.67708 # Southernmost_Latitude: 37.67708 # Easternmost_Longitude: -88.09786 # Westernmost_Longitude: -88.09786 # Elevation: 135 #--------------------------------------- # Data_Collection # Collection_Name: Rocks2020-iso-DiscHeli # First_Year: 30173 # Last_Year: 24564 # Time_Unit: cal. yr BP # Core_Length: # Notes: Stable isotope data from Discus and Helicodiscus gastropods. Rocks Section A and B (composite section based on 2 outcrops about 22 m apart); Section B (37.67700N, 88.09780W); Section A (37.67717N, 88.09792W) #--------------------------------------- # Chronology_Information # Chronology: # # ISGS# ISGS laboratory sample number for radiocarbon age # Sample Name name of sample from field bag # Depth (cm); Section A equivalent equivalent depth (cm below top of Section A) in Section A units (converted for Section B) # Geologic Unit lithostratigraphic unit (last glacial loess unit) # Material (with gastropod genera) material dated (shell or charcoal); with gastropod genera indicated # d13C carbon-13 isotope anomaly (two samples did not have enough mass for this measurement) # 14C ka BP age in radiocarbon years # ± one sigma error for radiocarbon date # cal yr BP age in calibrated radiocarbon years; using IntCal13 calibration curve (Reimer et al., 2013) # ± one sigma error for calibrated radiocarbon date # # ISGS # Sample Name Depth [cm]; Section A equivalent Geologic Unit Material (w/gastropod genera) d13C 14C ka BP ± cal yr BP ± # A3984 RocksA-182.5 cm 182.5 Peoria Silt Discus shell -- 21190 150 25530 170 # A3151 RocksA-217.5 cm 217.5 Peoria Silt Discus shell -6 20590 130 24800 225 # A3985 RocksA-292.5 cm 292.5 Peoria Silt Discus shell -6.8 21020 150 25370 175 # A3152 RocksA-352.5 cm 352.5 Peoria Silt Discus shell -4.9 21860 110 26070 125 # A3153 RocksA-412.5 cm 412.5 Peoria Silt Discus shell -6 21950 110 26150 125 # A4621 RocksA-462.5 cm (H) 462.5 Peoria Silt Hendersonia shell -6 21310 50 25660 80 # A4622 RocksA-462.5 cm (D) 462.5 Peoria Silt Discus shell -5 22700 70 27080 150 # A3986 RocksA-502.5 cm 502.5 Peoria Silt Discus shell -- 23390 200 27590 150 # A3154 RocksA-592.5 cm 592.5 Peoria Silt Stenotrema shell -6.2 23970 160 28020 175 # A4623 RocksA-637.5 cm 637.5 Peoria Silt Hendersonia shell 6 23580 70 27710 80 # A1184 RocksB-2.75 m 710 Peoria Silt charcoal -22.1 24880 110 28900 150 # A3155 RocksB-3.075 m 742.5 Peoria Silt -Roxana Silt transition Stenotrema shell -8.8 25740 200 29950 300 # A4620 RocksB-3.475 m 782.5 Peoria Silt -Roxana Silt transition Stenotrema shell -8.8 25790 80 30000 200 # #--------------------------------------- # 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 depth,,,meter,,loess and paleosol,,,N, ## Age age,,,calendar year before present,,loess and paleosol,,,N,Bayesian age model;calibrated years before 1950 ## Species identified gastropod,,,,,loess and paleosol,,,C,Gastropod species (terrestrial) ## ISGS# sample identification,,,,,loess and paleosol,,,C,ISGS stable isotope laboratory number ## Comments notes,,,,,loess and paleosol,,,C,averaging ## d13CVPDB delta 13C,gastropod,,per mil VPDB,,loess and paleosol,anomalized,isotope ratio mass spectrometry,N,spring and summer ## d13CVPDBcorr delta 13C,gastropod,,per mil VPDB,,loess and paleosol,anomalized;corrected, isotope ratio mass spectrometry,N, corrected for species differences; added 0.5 to H. parellelus values to compare with D. whitneyi; added 0.5 to H. parallelus d13C values;spring and summer ## d18OVPDB* delta 18O,gastropod,,per mil VPDB,,loess and paleosol,,isotope ratio mass spectrometry,N,spring and summer ## d18OVPDB*corr delta 18O,gastropod,,per mil VPDB,,loess and paleosol,anomalized;corrected,isotope ratio mass spectrometry,N, corrected for species differences; added 0.4 to H. parallelus d18O values to compare with D. whitneyi;spring and summer ## Method notes,,,,,loess and paleosol,,,C, method used with isotope ratio mass spectrometer; KIEL = Kiel III Carbonate Device coupled to Finnigan MAT 252 Isotope Ratio Mass Spectrometer # # Discus data only shown for depths 5.075, 5.125, 5.325, 5.725 #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: -999 Depth Age Species ISGS# Comments d13CVPDB d13CVPDBcorr d18OVPDB* d18OVPDB*corr Method 1.875 24564 Discus whitneyi KL018721 -6.98 -6.98 -0.71 -0.71 Kiel 1.925 24605 Discus whitneyi KL018700, KL018722 duplicates averaged -6.55 -6.55 -0.93 -0.93 Kiel 1.975 24648 Discus whitneyi KL018701, KL018723 duplicates averaged -7.14 -7.14 0.11 0.11 Kiel 2.025 24691 Discus whitneyi KL018724 -5.68 -5.68 -1.34 -1.34 Kiel 2.075 24734 Discus whitneyi KL018703 -6.50 -6.50 -0.64 -0.64 Kiel 2.125 24778 Discus whitneyi KL018717, KL018718 duplicates averaged -6.25 -6.25 -0.11 -0.11 Kiel 2.175 24821 Discus whitneyi KL018705 -6.19 -6.19 -0.02 -0.02 Kiel 2.225 24864 Discus whitneyi KL018706 -7.62 -7.62 -0.58 -0.58 Kiel 2.275 24907 Discus whitneyi KL018707 -4.82 -4.82 -0.27 -0.27 Kiel 2.325 24949 Discus whitneyi KL018710 -5.95 -5.95 -1.35 -1.35 Kiel 2.375 24993 Discus whitneyi KL018711 -6.50 -6.50 -0.95 -0.95 Kiel 2.425 25036 Discus whitneyi KL018712 -5.00 -5.00 0.08 0.08 Kiel 2.475 25078 Discus whitneyi KL018729 -6.65 -6.65 0.09 0.09 Kiel 2.575 25164 Discus whitneyi KL018730 -6.13 -6.13 -0.91 -0.91 Kiel 2.625 25207 Discus whitneyi KL018731 -6.58 -6.58 -0.44 -0.44 Kiel 2.675 25249 Discus whitneyi KL018732 -6.29 -6.29 -1.42 -1.42 Kiel 2.725 25293 Discus whitneyi KL018733 -6.28 -6.28 -1.44 -1.44 Kiel 2.775 25336 Discus whitneyi KL018734, KL018740 duplicates averaged -5.86 -5.86 -1.23 -1.23 Kiel 2.825 25380 Discus whitneyi KL018738 -6.53 -6.53 -0.11 -0.11 Kiel 2.875 25424 Discus whitneyi KL018735 -7.31 -7.31 -1.19 -1.19 Kiel 2.925 25468 Discus whitneyi KL018745 -5.83 -5.83 0.06 0.06 Kiel 2.975 25512 Discus whitneyi KL018746 -6.58 -6.58 1.32 1.32 Kiel 3.225 25741 Discus whitneyi KL018816 -6.92 -6.92 -0.35 -0.35 Kiel 3.275 25787 Discus whitneyi KL018817 -5.16 -5.16 -0.01 -0.01 Kiel 3.325 25833 Discus whitneyi KL018818 -7.41 -7.41 -0.61 -0.61 Kiel 3.375 25880 Discus whitneyi KL018819, KL018840 duplicates averaged -5.98 -5.98 -0.58 -0.58 Kiel 3.425 25926 Discus whitneyi KL018841 -6.68 -6.68 -0.04 -0.04 Kiel 3.475 25970 Discus whitneyi KL018821 -5.90 -5.90 -2.30 -2.30 Kiel 3.525 26017 Discus whitneyi KL018822 -6.74 -6.74 -1.22 -1.22 Kiel 3.575 26060 Discus whitneyi KL018823 -6.79 -6.79 -1.29 -1.29 Kiel 3.725 26186 Discus whitneyi KL018824 -5.80 -5.80 -0.54 -0.54 Kiel 3.775 26228 Discus whitneyi KL018825 -6.30 -6.30 -0.23 -0.23 Kiel 3.825 26228 Discus whitneyi KL018842 -6.31 -6.31 -0.70 -0.70 Kiel 3.875 26269 Discus whitneyi KL018829 -7.21 -7.21 -1.50 -1.50 Kiel 3.925 26310 Discus whitneyi KL018843 -7.30 -7.30 0.40 0.40 Kiel 4.025 26437 Discus whitneyi KL018844 -7.49 -7.49 -0.66 -0.66 Kiel 4.125 26524 Discus whitneyi KL018832 -6.16 -6.16 0.02 0.02 Kiel 4.225 26572 Discus whitneyi KL018833 -6.39 -6.39 -0.89 -0.89 Kiel 4.275 26624 Discus whitneyi KL018834 -7.41 -7.41 -1.04 -1.04 Kiel 4.325 26727 Discus whitneyi KL018835 -6.61 -6.61 -0.02 -0.02 Kiel 4.375 26779 Discus whitneyi KL018836 -6.61 -6.61 -0.98 -0.98 Kiel 4.425 26831 Discus whitneyi KL018998 -6.30 -6.30 -0.80 -0.80 Kiel 4.525 26938 Discus whitneyi KL018999 -6.17 -6.17 -0.15 -0.15 Kiel 4.575 26990 Discus whitneyi KL019000, KL019009 duplicates averaged -6.14 -6.14 -0.15 -0.15 Kiel 4.625 27042 Discus whitneyi KL019001 -6.61 -6.61 -0.08 -0.08 Kiel 4.725 27133 Discus whitneyi KL019002 -7.34 -7.34 -0.36 -0.36 Kiel 4.775 27177 Discus whitneyi KL019003 -6.35 -6.35 -0.16 -0.16 Kiel 4.825 27221 Discus whitneyi KL019004 -7.62 -7.62 -0.10 -0.10 Kiel 4.875 27266 Discus whitneyi KL019005 -6.57 -6.57 0.19 0.19 Kiel 4.925 27312 Discus whitneyi KL019006 -7.01 -7.01 0.46 0.46 Kiel 4.975 27357 Discus whitneyi KL019007 -6.81 -6.81 -0.01 -0.01 Kiel 5.025 27401 Discus whitneyi KL019010 -6.71 -6.71 -0.09 -0.09 Kiel 5.075 27442 D. whitneyi / H.parellelus KL019011, KL020075, KL020079 duplicates-species averaged (corrected) -6.83 -6.70 -0.49 -0.36 Kiel 5.125 27482 D. whitneyi / H.parellelus KL019012, KL020076 species average (corrected column) -6.84 -6.96 -0.10 0.50 Kiel 5.175 27521 Discus whitneyi KL019013 -7.77 -7.77 0.28 0.28 Kiel 5.225 27559 Discus whitneyi KL019014, KL019021 duplicates averaged -6.88 -6.88 0.26 0.26 Kiel 5.275 27598 Helicodiscus parallelus KL020080 -7.72 -7.22 -1.27 -0.87 Kiel 5.325 27637 D. whitneyi / H.parellelus KL019015, KL020081 species average (corrected column) -7.41 -7.65 0.84 0.20 Kiel 5.375 27676 Helicodiscus parallelus KL020082 -7.40 -6.90 -1.28 -0.88 Kiel 5.425 27715 Helicodiscus parallelus KL020083, KL020091 duplicates averaged -6.19 -5.69 0.33 0.73 Kiel 5.475 27753 Helicodiscus parallelus KL020084 -8.04 -7.54 -1.16 -0.76 Kiel 5.525 27792 Helicodiscus parallelus KL020085 -7.83 -7.33 -0.68 -0.28 Kiel 5.625 27871 Helicodiscus parallelus KL020088 -7.86 -7.36 -1.57 -1.17 Kiel 5.675 27910 Helicodiscus parallelus KL020090 -7.77 -7.27 -0.53 -0.13 Kiel 5.725 27949 D. whitneyi / H.parellelus KL019016, KL020092 species average (corrected column) -7.16 -7.00 -0.41 -0.50 Kiel 5.775 27987 Helicodiscus parallelus KL020093 -7.50 -7.00 -1.19 -0.79 Kiel 5.825 28027 Helicodiscus parallelus KL020094 -6.85 -6.35 -0.18 0.22 Kiel 5.875 28066 Helicodiscus parallelus KL020095 -7.58 -7.08 -0.63 -0.23 Kiel 5.925 28106 Helicodiscus parallelus KL020096 -6.87 -6.37 -1.11 -0.71 Kiel 5.975 28146 Helicodiscus parallelus KL020097 -7.54 -7.04 -0.49 -0.09 Kiel 6.025 28187 Helicodiscus parallelus KL020098, KL020103 duplicates averaged -7.81 -7.31 -1.40 -1.00 Kiel 6.075 28229 Helicodiscus parallelus KL020099 -8.40 -7.90 -0.75 -0.35 Kiel 6.275 28398 Helicodiscus parallelus KL020101 -8.39 -7.89 -1.08 -0.68 Kiel 6.325 28440 Helicodiscus parallelus KL020102 -6.69 -6.19 -0.63 -0.23 Kiel 6.375 28483 Helicodiscus parallelus KL020104 -7.91 -7.41 0.26 0.66 Kiel 7.325 29427 Helicodiscus parallelus KL020113 -9.10 -8.60 -0.20 0.20 Kiel 7.375 29485 Helicodiscus parallelus KL020105 -8.30 -7.80 -0.51 -0.11 Kiel 7.425 29542 Helicodiscus parallelus KL020106 -8.91 -8.41 -0.87 -0.47 Kiel 7.475 29599 Helicodiscus parallelus KL020107 -9.70 -9.20 -1.89 -1.49 Kiel 7.525 29657 Helicodiscus parallelus KL020114 -10.48 -9.98 -0.36 0.04 Kiel 7.575 29714 Helicodiscus parallelus KL020115 -8.37 -7.87 -0.36 0.04 Kiel 7.625 29772 Helicodiscus parallelus KL020116 -7.70 -7.20 -0.89 -0.49 Kiel 7.675 29829 Helicodiscus parallelus KL020117, KL020123 duplicates averaged -6.92 -6.42 -0.98 -0.58 Kiel 7.725 29886 Helicodiscus parallelus KL020118 -8.11 -7.61 -0.84 -0.44 Kiel 7.775 29944 Helicodiscus parallelus KL020263 -7.11 -6.61 -0.88 -0.48 Kiel 7.825 30001 Helicodiscus parallelus KL020120 -8.71 -8.21 -1.20 -0.80 Kiel 7.875 30058 Helicodiscus parallelus KL020121 -8.86 -8.36 -0.37 0.03 Kiel 7.925 30116 Helicodiscus parallelus KL020124 -8.66 -8.16 -1.48 -1.08 Kiel 7.975 30173 Helicodiscus parallelus KL020264 -8.73 -8.23 -1.75 -1.35 Kiel