DOCSLIB.ORG

Editor Associate Editors Kline Geology Laboratory

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Editor Associate Editors Kline Geology Laboratory VOLUME 28 / NUMBER 1 / 1986 Published by THE AMERICAN JOURNAL OF SCIENCE Editor MINZE STUIVER Associate Editors To serve until January 1, 1989 STEPHEN C PORTER Seattle, Washington To serve until January 1, 1987 W G MOOK Groningen, The Netherlands HANS OESCHGER Bern, Switzerland To serve until January 1, 1987 RONALD B DAVIS Orono, Maine To serve until January 1, 1990 ANDREW MOORE I RENEE S KRA Kline Geology Laboratory Yale University New Haven, Connecticut 06511 ISSN: 0033-8222 NOTICE TO READERS AND CONTRIBUTORS Since its inception, the basic purpose of Radiocarbon has been the publication of com- pilations of 14C dates produced by various laboratories. These lists are extremely useful for the dissemination of basic 14C information. In recent years, Radiocarbon has also been publishing technical and interpretative arti- cles on all aspects of 14C. We would like to encourage this type of publication on a regular basis. In addition, we will be publishing compilations of published and unpublished dates along with interpretative text for these dates on a regional basis. Authors who would like to compose such an article for his/her area of interest should contact the Managing Editor for infor- mation. Another section is added to our regular issues, "Notes and Comments." Authors are invited to extend discussions or raise pertinent questions to the results of scientific inves- tigations that have appeared on our pages. The section includes short, technical notes to relay information concerning innovative sample preparation procedures. Laboratories may also seek assistance in technical aspects of radiocarbon dating. Book reviews will also be included for special editions. Manuscripts of radiocarbon papers should follow the recommendations in Suggestions to Authors* and RADIOCARBON Style Guide (R, 1984, v 26, p 152-158). Our deadline schedule for submitting manuscripts is: For Date Vol 29, No. 1, 1987 Sept 1, 1986 Vol 29, No. 2, 1987 Jan 1, 1987 Vol 29, No. 3, 1987 May 1, 1987 Half life of 14C. In accordance with the decision of the Fifth Radiocarbon Dating Conference, Cambridge, 1962, all dates published in this volume (as in previous volumes) are based on the Libby value, 5570 ± 30 yr, for the half life. This decision was reaffirmed at the 11th International Radiocarbon Conference in Seattle, Washington, 1982. Because of various uncertainties, when 14C, measurements are expressed as dates in years BP the accuracy of the dates is limited, and refinements that take some but not all uncertainties into account may be misleading. The mean of three recent determinations of the half life, 5730 ± 40 yr, (Nature, v 195, no. 4845, p 984, 1962), is regarded as the best value presently available. Published dates in years BP can be converted to this basis by multiplying them by 1.03. AD/BC Dates. In accordance with the decision of the Ninth International Radiocarbon Con- ference, Los Angeles and San Diego, 1976, the designation of AD/BC, obtained by sub- tracting AD 1950 from conventional BP determinations is discontinued in Radiocarbon. Authors or submitters may include calendar estimates as a comment, and report these esti- mates as cal AD/BC, citing the specific calibration curve used to obtain the estimate. Cal- ibrated dates will now be reported as "cal BP" or "cal AD/BC" according to the consensus of the Twelfth International Radiocarbon Conference, Trondheim, Norway, 1985. S14C. Meaning of In Volume 3, 1961, we endorsed the notation A (Lamont VIII, 1961) for geochemical measurements of 14C activity, corrected for isotopic fractionation in samples and b14C in the NBS oxalic-acid standard. The value of that entered the calculation of A was defined by reference to Lamont VI, 1959, and was corrected for age. This fact has been lost sight of, by editors as well as by authors, and recent papers have used 6140 as the observed deviation from the standard. At the New Zealand Radiocarbon Dating Conference it was recommended to use S14C only for age-corrected samples. Without an age correction, the value should then be reported as percent of modern relative to 0.95 NBS oxalic acid (Pro- ceedings 8th Conference on Radiocarbon Dating, Wellington, New Zealand, 1972). The Ninth International Radiocarbon Conference, Los Angeles and San Diego, 1976, recom- mended that the reference standard, 0.95 times NBS oxalic acid activity, be S1sC normalized to = -19%0. '4C In several fields, however, age corrections are not possible. 6 and A, uncorrected for age, have been used extensively in oceanography, and are an integral part of models and theories. For the present, therefore, we continue the editorial policy of using A notations for samples not corrected for age. *Suggestions to Authors of the Reports of the United States Geological Survey, 6th ed, 1978, Supt of Documents, U S Govt Printing Office, Washington, DC 20402. Vol 28, No. i Radiocarbon 1986 CONTENTS Spatial and Temporal Distribution of Radiocarbon Ages on Rodent Middens from the Southwestern United States Robert H Webb ......................................................................................... 1 DATE LISTS Gif Georgette Delibrias, M-T Guillier, and Jacques Labeyrie Gif Natural Radiocarbon Measurements X ............................................ 9 IRPA Michele Dauchot-Dehon, Mark Van Strydonck, and Jos Heylen Institut Royal du Patrimoine Artistique Radiocarbon Dates XI ............. 69 ISGS Chao Li Liu, Kerry M Riley, and Dennis D Coleman Illinois State Geological Survey Radiocarbon Dates VIII ....................... 78 ISGS Chao Li Liu, Kerry M Riley, and Dennis D Coleman Illinois State Geological Survey Radiocarbon Dates IX .......................... 110 KN Th Schulte im Walde, JC Freundlich, Hermann Schwabedissen, and Wolfgang Taute Koln Radiocarbon Dates III .................................................................. 134 Lu Soren Hakansson University of Lund Radiocarbon Dates XVIII........................................ 141 NOTES AND COMMENTS Glassy Microspherules from Bomb Combustion of Charcoal Richard Burleigh and Nigel Meeks ............................................................ 165 14C Announcement of a New Collaborative Study for Intercalibration of Dating Laboratories EM Scott, MS Baxter, TC Aitchison, DD Harkness, and GT Cook ................. 167 Radiocarbon Dating Blood Residues on Prehistoric Stone Tools DE Nelson, TH Loy, JS Vogel, andJR Southon........................................... 170 Radiocarbon Proceedings of the 12th International Radiocarbon Conference Trondheim, Norway, June 24-28, 1985 Radiocarbon, Volume 28, Number 2A & B, 1986 @ $60.00 Please order from: Radiocarbon Kline Geology Laboratory Yale University PO Box 6666 New Haven, CT 06511 11 [RADIOCARBON, VOL 28, No. 1, 1986, P 1-8] Radiocarbon 1986 SPATIAL AND TEMPORAL DISTRIBUTION OF RADIOCARBON AGES ON RODENT MIDDENS FROM THE SOUTHWESTERN UNITED STATES ROBERT H WEBB U S Geological Survey, 300 W Congress Street, FB-44 Tucson, Arizona 85701 INTRODUCTION The analysis of rodent middens, principally deposited by packrats (Neo- toma sp), has rapidly become the most important paleoecologic and paleo- climatologic tool in the southwestern United States. The recent discovery of rodent middens created by stick-nest rats (Leporillus sp) and rock walla- bies (Petrogale sp) in Australia (Green et al, 1983; P S Martin, oral commun, 1984) and by dassie rats (Petromus typicus) in South Africa (L Scott, oral commun, 1984) portends the use of midden analysis in arid regions world- wide. Several recent reviews of southwestern paleoecology (eg, Spaulding et at, 1983) rely heavily on rodent middens for ecologic and climatic recon- structions. Here I provide a compilation of the spatial and temporal distribution of 14C dates on rodent middens from the Southwest, superseding that of Mead, Thompson, and Long (1978). Packrat middens are usually unstrati- fied, are possibly occupied at different times, and commonly require multi- ple 14C dates (Spaulding, 1983). Therefore, the chronology of rodent mid- dens depends entirely upon 14C dates. The sampling bias and statistical distribution of 14C dates in time and space strongly affect regional paleo- ecologic interpretations derived from rodent middens. METHODS I4C dates and the latitude, longitude, and elevation were collected from all published and selected unpublished studies of rodent middens in the southwestern United States and northern Mexico (see Bibliography). "Rodent middens" refers to predominantly indurated deposits formed by packrats (Neotoma sp) and also include several porcupine (Erethizon dorsa- tum) middens from New Mexico, Arizona, and Colorado (Van Devender, Betancourt & Wimberly,1984). Unpublished dates were obtained from the files the Paleoenvironmental Laboratories at the University of Arizona of 14C and from many individuals associated with midden research. Multiple dates for several middens were included as separate samples because each date, not necessarily each midden, is the basis for age determinations. 1 2 Robert H Webb RESULTS A total of 910 14C dates on rodent middens was obtained for analysis and an additional 42 "modern" middens were dated by the presence of chlorophyllous materials. The University of Arizona analyzed 57% of the dates; 15 other laboratories analyzed the remaining 43%. During 1983-84, researchers obtained 39 of the 91014C dates from small samples using the University of Arizona tandem accelerator mass spectrometer (TAMS) (Don- ahue et al, 1983). A histogram of 14C dates (fig 1) indicates a bimodal distribution
Load more

Recommended publications
  • Varve-Related Publications in Alphabetical Order (Version 15 March 2015) Please Report Additional References, Updates, Errors Etc
    Varve-Related Publications in Alphabetical Order (version 15 March 2015) Please report additional references, updates, errors etc. to Arndt Schimmelmann ([email protected]) Abril JM, Brunskill GJ (2014) Evidence that excess 210Pb flux varies with sediment accumulation rate and implications for dating recent sediments. Journal of Paleolimnology 52, 121-137. http://dx.doi.org/10.1007/s10933-014-9782-6; statistical analysis of radiometric dating of 10 annually laminated sediment cores from aquatic systems, constant rate of supply (CRS) model. Abu-Jaber NS, Al-Bataina BA, Jawad Ali A (1997) Radiochemistry of sediments from the southern Dead Sea, Jordan. Environmental Geology 32 (4), 281-284. http://dx.doi.org/10.1007/s002540050218; Dimona, Jordan, gamma spectroscopy, lead-210, no anthropogenic contamination, calculated sedimentation rate agrees with varve record. Addison JA, Finney BP, Jaeger JM, Stoner JS, Norris RN, Hangsterfer A (2012) Examining Gulf of Alaska marine paleoclimate at seasonal to decadal timescales. In: (Besonen MR, ed.) Second Workshop of the PAGES Varves Working Group, Program and Abstracts, 17-19 March 2011, Corpus Christi, Texas, USA, 15-21. http://www.pages.unibe.ch/download/docs/working_groups/vwg/2011_2nd_VWG_workshop_programs_and_abstracts.pdf; ca. 60 cm marine sediment core from Deep Inlet in southeast Alaska, CT scan, XRF scanning, suspected varves, 1972 earthquake and tsunami caused turbidite with scouring and erosion. Addison JA, Finney BP, Jaeger JM, Stoner JS, Norris RD, Hangsterfer A (2013) Integrating satellite observations and modern climate measurements with the recent sedimentary record: An example from Southeast Alaska. Journal of Geophysical Research: Oceans 118 (7), 3444-3461. http://dx.doi.org/10.1002/jgrc.20243; Gulf of Alaska, paleoproductivity, scanning XRF, Pacific Decadal Oscillation PDO, fjord, 137Cs, 210Pb, geochronometry, three-dimensional computed tomography, discontinuous event-based marine varve chronology spans AD ∼1940–1981, Br/Cl ratios reflect changes in marine organic matter accumulation.
    [Show full text]
  • Paleoenvironmental Reconstructions in the Baltic Sea and Iberian Margin
    Paleoenvironmental reconstructions in the Baltic Sea and Iberian Margin Assessment of GDGTs and long-chain alkenones in Holocene sedimentary records Lisa Alexandra Warden Photography: Cover photos: Dietmar Rüß Inside photos: Dietmar Rüß, René Heistermann and Claudia Zell Printed by: Ridderprint, Ridderkerk Paleoenvironmental reconstructions in the Baltic Sea and Iberian Margin Assessment of GDGTs and long-chain alkenones in Holocene sedimentary records Het gebruik van GDGTs en alkenonen in Holocene sedimentaire archieven van de Baltische Zee en kustzeeën van het Iberisch schiereiland voor paleomilieureconstructie (met een samenvatting in het Nederlands) Proefschrift ter verkrijging van de graad van doctor aan de Universiteit Utrecht op gezag van de rector magnificus, prof. dr. G.J. van der Zwaan, ingevolge het besluit van het college voor promoties in het openbaar te verdedigen op vrijdag 31 maart 2017 des middags te 12.45 uur door Lisa Alexandra Warden geboren op 24 januari 1982 te Philadelphia, Verenigde Staten van Amerika Promotor: Prof. dr. ir. J.S. Sinninghe Damsté This work has been financially supported by the European Research Council (ERC) and the NIOZ Royal Netherlands Institute for Sea Research. “We are the first generation to feel the impact of climate change and the last generation that can do something about it.” -President Obama For Lauchlan, who was with me the whole time as I wrote this thesis. Photo by Dietmar Rüß Contents Chapter 1 – Introduction 9 Chapter 2 - Climate forced human demographic and cultural change in
    [Show full text]
  • Post-Glacial History of Sea-Level and Environmental Change in the Southern Baltic Sea
    Post-Glacial History of Sea-Level and Environmental Change in the Southern Baltic Sea Kortekaas, Marloes 2007 Link to publication Citation for published version (APA): Kortekaas, M. (2007). Post-Glacial History of Sea-Level and Environmental Change in the Southern Baltic Sea. Department of Geology, Lund University. Total number of authors: 1 General rights Unless other specific re-use rights are stated the following general rights apply: Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Read more about Creative commons licenses: https://creativecommons.org/licenses/ Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. LUND UNIVERSITY PO Box 117 221 00 Lund +46 46-222 00 00 Post-glacial history of sea-level and environmental change in the southern Baltic Sea Marloes Kortekaas Quaternary Sciences, Department of Geology, GeoBiosphere Science Centre, Lund University, Sölvegatan 12, SE-22362 Lund, Sweden This thesis is based on four papers listed below as Appendices I-IV.
    [Show full text]
  • Scale and Structure of Time-Averaging (Age Mixing) in Terrestrial Gastropod Assemblages from Quaternary Eolian Deposits of the E
    Palaeogeography, Palaeoclimatology, Palaeoecology 251 (2007) 283–299 www.elsevier.com/locate/palaeo Scale and structure of time-averaging (age mixing) in terrestrial gastropod assemblages from Quaternary eolian deposits of the eastern Canary Islands ⁎ Yurena Yanes a, , Michał Kowalewski a, José Eugenio Ortiz b, Carolina Castillo c, Trinidad de Torres b, Julio de la Nuez d a Department of Geosciences, Virginia Polytechnic Institute and State University, 4044 Derring Hall, Blacksburg, VA, 24061, US b Biomolecular Stratigraphy Laboratory, Escuela Técnica Superior de Ingenieros de Minas de Madrid, C/ Ríos Rosas 21, 28003, Madrid, Spain c Departamento de Biología Animal, Facultad de Biología, Universidad de La Laguna, Avda. Astrofísico Fco. Sánchez, s/n. 38206, La Laguna, Tenerife, Canary Islands, Spain d Departamento de Edafología y Geología, Facultad de Biología, Universidad de La Laguna, Avda. Astrofísico Fco. Sánchez, s/n. 38206, La Laguna, Tenerife, Canary Islands, Spain Received 13 November 2006; received in revised form 10 March 2007; accepted 9 April 2007 Abstract Quantitative estimates of time-averaging (age mixing) in gastropod shell accumulations from Quaternary (the late Pleistocene and Holocene) eolian deposits of Canary Islands were obtained by direct dating of individual gastropods obtained from exceptionally well-preserved dune and paleosol shell assemblages. A total of 203 shells of the gastropods Theba geminata and T. arinagae, representing 44 samples (=stratigraphic horizons) from 14 sections, were dated using amino acid (isoleucine) epimerization ratios calibrated with 12 radiocarbon dates. Most samples reveal a substantial variation in shell age that exceeds the error that could be generated by dating imprecision, with the mean within-sample shell age range of 6670 years and the mean standard deviation of 2920 years.
    [Show full text]
  • Land Uplift and Relative Sea-Level Changes in the Loviisa Area, Southeastern Finland, During the Last 8000 Years
    F10000009 POSIVA 99-28 Land uplift and relative sea-level changes in the Loviisa area, southeastern Finland, during the last 8000 years Arto Miettinen Matti Eronen Hannu Hyvarinen Department of Geology University of Helsinki September 1999 POSIVA OY Mikonkatu 15 A. FIN-001O0 HELSINKI, FINLAND Phone (09) 2280 30 (nat.). ( + 358-9-) 2280 30 (int.) Fax (09) 2280 3719 (nat.), ( + 358-9-) 2280 3719 (int.) POSIVA 99-28 Land uplift and relative sea-level changes in the Loviisa area, southeastern Finland, during the last 8000 years Arto Miettinen Matti Eronen Hannu Hyvarinen September 1999 POSIVA OY Mikonkatu 15 A, FIN-OO1OO HELSINKI, FINLAND Phone (09) 2280 30 (nat.), ( + 358-9-) 2280 30 (int.) 3 1/23 Fax (09) 2280 3719 (nat.), ( + 358-9-) 2280 3719 (int.) Posiva-raportti - Posiva Report Raporfintumus-Report <»*> POSIVA 99-28 Posiva Oy . Mikonkatu 15 A, FIN-00100 HELSINKI, FINLAND JuikaisuaiKa Date Puh. (09) 2280 30 - Int. Tel. +358 9 2280 30 September 1999 Tekija(t) - Author(s) Toimeksiantaja(t) - Commissioned by Arto Miettinen MattiEronen Posiva Oy Hannu Hyvannen y Department of Geology, University of Helsinki Nimeke - Title LAND UPLIFT AND RELATIVE SEA-LEVEL CHANGES IN THE LOVIISA AREA, SOUTHEASTERN FINLAND, DURING THE LAST 8000 YEARS Tiivistelma - Abstract Southeastern Finland belongs to the area covered by the Weichselian ice sheet, where the release of the ice load caused a rapid isostatic rebound during the postglacial time. While the mean overall apparent uplift is of the order of 2 mm/yr today, in the early Holocene time it was several times higher. A marked decrease in the rebound rate occurred around 8500 BP, however, since then the uplift rate has remained high until today, with a slightly decreasing trend towards the present time.
    [Show full text]
  • Late Weichselian and Holocene Shore Displacement History of the Baltic Sea in Finland
    Late Weichselian and Holocene shore displacement history of the Baltic Sea in Finland MATTI TIKKANEN AND JUHA OKSANEN Tikkanen, Matti & Juha Oksanen (2002). Late Weichselian and Holocene shore displacement history of the Baltic Sea in Finland. Fennia 180: 1–2, pp. 9–20. Helsinki. ISSN 0015-0010. About 62 percent of Finland’s current surface area has been covered by the waters of the Baltic basin at some stage. The highest shorelines are located at a present altitude of about 220 metres above sea level in the north and 100 metres above sea level in the south-east. The nature of the Baltic Sea has alter- nated in the course of its four main postglacial stages between a freshwater lake and a brackish water basin connected to the outside ocean by narrow straits. This article provides a general overview of the principal stages in the history of the Baltic Sea and examines the regional influence of the associated shore displacement phenomena within Finland. The maps depicting the vari- ous stages have been generated digitally by GIS techniques. Following deglaciation, the freshwater Baltic Ice Lake (12,600–10,300 BP) built up against the ice margin to reach a level 25 metres above that of the ocean, with an outflow through the straits of Öresund. At this stage the only substantial land areas in Finland were in the east and south-east. Around 10,300 BP this ice lake discharged through a number of channels that opened up in central Sweden until it reached the ocean level, marking the beginning of the mildly saline Yoldia Sea stage (10,300–9500 BP).
    [Show full text]
  • Aspartic Acid Racemization and Radiocarbon Dating of an Early Milling Stone Horizon Burial in California Darcy Ike; Jeffrey L. B
    Aspartic Acid Racemization and Radiocarbon Dating of an Early Milling Stone Horizon Burial in California Darcy Ike; Jeffrey L. Bada; Patricia M. Masters; Gail Kennedy; John C. Vogel American Antiquity, Vol. 44, No. 3. (Jul., 1979), pp. 524-530. Stable URL: http://links.jstor.org/sici?sici=0002-7316%28197907%2944%3A3%3C524%3AAARARD%3E2.0.CO%3B2-6 American Antiquity is currently published by Society for American Archaeology. Your use of the JSTOR archive indicates your acceptance of JSTOR's Terms and Conditions of Use, available at http://www.jstor.org/about/terms.html. JSTOR's Terms and Conditions of Use provides, in part, that unless you have obtained prior permission, you may not download an entire issue of a journal or multiple copies of articles, and you may use content in the JSTOR archive only for your personal, non-commercial use. Please contact the publisher regarding any further use of this work. Publisher contact information may be obtained at http://www.jstor.org/journals/sam.html. Each copy of any part of a JSTOR transmission must contain the same copyright notice that appears on the screen or printed page of such transmission. The JSTOR Archive is a trusted digital repository providing for long-term preservation and access to leading academic journals and scholarly literature from around the world. The Archive is supported by libraries, scholarly societies, publishers, and foundations. It is an initiative of JSTOR, a not-for-profit organization with a mission to help the scholarly community take advantage of advances in technology. For more information regarding JSTOR, please contact [email protected].
    [Show full text]
  • The Late Quaternary Development of the Baltic Sea
    The late Quaternary development of the Baltic Sea Svante Björck, GeoBiosphere Science Centre, Department of Geology, Quaternary Sciences, Lund University, Sölveg. 12, SE-223 62 Lund, Sweden INTRODUCTION Since the last deglaciation of the Baltic basin, which began 15 000-17 000 cal yr BP (calibrated years Before Present) and ended 11 000-10 000 cal yr BP, the Baltic has undergone many very different phases. The nature of these phases were determined by a set of forcing factors: a gradually melting Scandinavian Ice Sheet ending up into an interglacial environment, the highly differential glacio-isostatic uplift within the basin (from 9 mm/yr to -1mm/yr; Ekman 1996), changing geographic position of the controlling sills (Fig. 1), varying depths and widths of the thresholds between the sea and the Baltic basin, and climate change. These factors have caused large variations in salinity and water exchange with the outer ocean, rapid to gradual paleographic alterations with considerable changes of the north-south depth profile with time. For example, the area north of southern Finland-Stockholm has never experienced transgressions, or land submergence, while the developmen south of that latitude has been very complex. The different controlling factors are also responsible for highly variable sedimentation rates, both in time and space, and variations of the aquatic productivity as well as faunal and floral changes. The basic ideas in this article follow the lengthy, but less up-dated version of the Baltic Sea history (Björck, 1995), a more complete reference list and, e.g., the calendar year chronology of the different Baltic phases can be found on: http://www.geol.lu.se/personal/seb/Maps%20of%20the%20Baltic.htm.
    [Show full text]
  • Aspartic Acid Racemization As a Dating Tool for Dentine: a Reality
    Quaternary Geochronology 22 (2014) 43e56 Contents lists available at ScienceDirect Quaternary Geochronology journal homepage: www.elsevier.com/locate/quageo Research paper Aspartic acid racemization as a dating tool for dentine: A reality Trinidad Torres a,*, José E. Ortiz a, Eva Fernández b,c, Eduardo Arroyo-Pardo b, Rainer Grün d, Alfredo Pérez-González e a Laboratory of Biomolecular Stratigraphy, E.T.S.I. Minas, Universidad Politécnica de Madrid, C/Ríos Rosas 21, Madrid 28003, Spain b Forensic Genetics and Population Genetics Laboratory, Department of Toxicology and Health Legislation, Faculty of Medicine, Universidad Complutense, de Madrid, Spain c Instituto de Arqueologia e Paleociencias, das Universidades Nova de Lisboa e do Algarve, Lisbon, Portugal d Research School of Earth Sciences, The Australian National University, Canberra, ACT 0200, Australia e Centro Nacional de Investigación sobre Evolución Humana, Pso Sierra de Atapuerca s/n, 09002 Burgos, Spain article info abstract Article history: Given the interest in dating sediments from numerous caves, lakes and fluvial terraces containing fossils Received 20 September 2011 and lithic components in Europe, here we provide a complete revision of the amino acid racemization Received in revised form (AAR) (aspartic acid in dentine) dating method in vertebrates. To examine the reliability of this method, 7 October 2013 which is based on a straightforward sample preparation (previous 3.5 kDa dialysis), we used a range of Accepted 5 February 2014 dental material. We examined human dentine collagen from living donors and remains from historical Available online 26 February 2014 (16th and 19th centuries) and prehistorical (Neolithic) periods. On the assumption that genus does not affect collagen racemization rates, we also studied Neanderthal material and material from carnivores Keywords: Dentine collagen (cave bear) and several other mammals.
    [Show full text]
  • In the Wake of Deglaciation - Sedimentary Signatures of Ice-Sheet Decay and Sea-Level Change
    ! "# "$%&%'($$) * * +%,( - ."" %% /( 0 * 1 ./-2+ .-2/ *./3 4 .34/ 4*./5 6 .6/ 47 ( .-2/ .34 6/ 5 * * * ( 4 7 *-2 ( -2 8 ! 0(6 70-*9 * - (: ;<'$=<$( 7( 7 0-* %%><$="&$( 7(3 * 70-.?%"(&( 7/ 9 ( - *34 3 .?%%( 7/ 7 * @ (6 7 5 34 (3 * @ 7 (6 A 34(6 @ ( ! 5B 9 5 C * @ 5B @ (6 . :/ *6* (6 D: - 0(@ @ * * - 5(6 5B @ ( !" "$%& 1EE ( ( E F G 1 1 1 1%<';$> 07:;#&;%##;#%>', 07:;#&;%##;#%>,% ! *%$>;% IN THE WAKE OF DEGLACIATION - SEDIMENTARY SIGNATURES OF ICE-SHEET DECAY AND SEA-LEVEL CHANGE Henrik Swärd In the wake of deglaciation - sedimentary signatures of ice-sheet decay and sea-level change Studies from south-central Sweden and the western Arctic Ocean Henrik Swärd ©Henrik Swärd, Stockholm University 2018 ISBN print 978-91-7797-163-4 ISBN PDF 978-91-7797-164-1 Cover: Sólheimajökull, Iceland. Photo: Henrik Swärd Printed in Sweden by Universitetsservice US-AB, Stockholm 2018 Distributor: Department of Geological Sciences, Stockholm University S.D.G. Abstract Lacustrine and marine sedimentary archives help
    [Show full text]
  • Past Shore-Level and Sea-Level Displacements
    SGU Rapporter och meddelanden 137 Rapporter och meddelanden 137 Past shore-level and sea-level displacements Tore Påsse & Johan Daniels Past shore-level and sea-level displacements Rapporter och meddelanden 137 Past shore-level and sea-level displacements Tore Påsse & Johan Daniels Sveriges geologiska undersökning 2015 ISSN 0349-2176 ISBN 978-91-7403-291-8 Cover: Paleogeograpical map showing the distribution of land (green), ice (white) and sea and lakes (blue). This map was con- structed by the model presented in this paper. © Sveriges geologiska undersökning Layout: Rebecca Litzell Tryck: Elanders Sverige AB Contents Sammanfattning ..................................................................................................................... 4 Abstract .................................................................................................................................... 5 Introduction ............................................................................................................................. 6 The shore-level model ............................................................................................................ 7 Empirical data ........................................................................................................................... 7 Method ..................................................................................................................................... 8 Formulas for land uplift ...........................................................................................................
    [Show full text]
  • Timing of the First Drainage of the Baltic Ice Lake Synchronous with the Onset of Greenland Stadial 1
    Timing of the first drainage of the Baltic Ice Lake synchronous with the onset of Greenland Stadial 1 FRANCESCO MUSCHITIELLO, JAMES M. LEA, SARAH L. GREENWOOD, FAEZEH M. NICK, LARS BRUNNBERG, ALISON MACLEOD AND BARBARA WOHLFARTH Muschitiello, F., Lea, J. M., Greenwood, S. L., Nick, F. M., Brunnberg, L., Macleod, A. & Wohlfarth, B.: Timing of the first drainage of the Baltic Ice Lake synchronous with the onset of Greenland Stadial 1. Boreas. 10.1111/ bor.12155. ISSN 0300-9483. Glacial varves can give significant insights into recession and melting rates of decaying ice sheets. Moreover, varve chronologies can provide an independent means of comparison to other annually resolved climatic archives, which ultimately help to assess the timing and response of an ice sheet to changes across rapid climate transitions. Here we report a composite 1257-year-long varve chronology from southeastern Sweden spanning the regional late Allerød–late Younger Dryas pollen zone. The chronology was correlated to the Greenland Ice- Core Chronology 2005 using the time-synchronous Vedde Ash volcanic marker, which can be found in both suc- cessions. For the first time, this enables secure placement of the Lateglacial Swedish varve chronology in abso- lute time. Geochemical analysis from new varve successions indicate a marked change in sedimentation regime accompanied by an interruption of ice-rafted debris deposition synchronous with the onset of Greenland Stadial 1 (GS-1; 12 846 years before AD 1950). With the support of a simple ice-flow/calving model, we suggest that slowdown of sediment transfer can be explained by ice-sheet margin stabilization/advance in response to a sig- nificant drop of the Baltic Ice Lake level.
    [Show full text]