• Radiocarbon Chronology of Paleogeographic Events of the Late Pleistocene and Holocene in Russia

      Kaplin, P. A.; Svitoch, A. A.; Parunin, O. B. (Department of Geosciences, The University of Arizona, 1993-01-01)
      14C chronology of Late Pleistocene paleogeographical events in the Black Sea-Caspian Sea region shows that the following transgressions partly correlate with each other: Karangat and Khazarian; Neo-Euxinian and Khvalyn; Holocene and Neo-Caspian. The main climatic events were synchronous in intercontinental Siberia. In the far eastern region, the Middle-Wisconsinan transgression is reflected by Chukotka and western Kamchatka terraces and by submerged ancient shorelines in Primorye.
    • Mesolithic and Neolithic Habitation of the Eastern Baltic

      Liiva, Arvi; Loze, Ilze (Department of Geosciences, The University of Arizona, 1993-01-01)
      In this paper we consider the radiocarbon chronology of Mesolithic and Neolithic settlement sites in the eastern Baltic region. Dating of wood and charcoal from Estonian and Latvian sites establishes the periods (early, middle and late) within these epochs. We present 90 14C dates, as yet unpublished in RADIOCARBON, produced by laboratories in Riga, Tallin, Tartu, Leningrad and Moscow.
    • Late Pleistocene Geochronology of European Russia

      Arslanov, Kh A. (Department of Geosciences, The University of Arizona, 1993-01-01)
      I constructed a Late Pleistocene geochronological scale for European Russia employing 14C dating and paleobotanical studies of several reference sections.
    • Author Index – Volume 35, 1993

      Department of Geosciences, The University of Arizona, 1993-01-01
    • A Regional Geochronological Study of Late Pleistocene Permafrost

      Kostyukevich, V. V. (Department of Geosciences, The University of Arizona, 1993-01-01)
      The use of radiocarbon dating in geocryological investigations makes it possible to establish a chronology for permafrost-geological development during the Late Pleistocene. Both global and regional time scales for the formation of Late Pleistocene permafrost have been worked out over the past 15-20 years at the Permafrost Institute of the Siberian Branch of the Russian Academy of Sciences. I present here results from study areas of northwestern Siberia and of North, Central and West Yakutia.
    • Reconstruction of Caspian Sea-Level Fluctuations: Radiocarbon Dating Coastal and Bottom Deposits

      Karpytchev, Yu A. (Department of Geosciences, The University of Arizona, 1993-01-01)
      Owing to the large basin area of the Caspian Sea, fluctuations in its level reflect climatic changes in the northern hemisphere. To reconstruct these fluctuations, I collected mollusk shells, plant debris, carbonates and organic matter samples for 14C dating from deposits of ancient salt marshes, depressions and bars formed during significant sea-level decline. I studied the impact of eolian sedimentation via parallel dating of carbonates and other materials. The data demonstrate that sea level rises during periods of cooling and falls during warming periods; this is true for both long-term (2-2.5 ka) and short-term climatic changes.
    • Late Paleolithic Chronology of the East European Plain

      Svezhentsev, Yu S.; Popov, S. G. (Department of Geosciences, The University of Arizona, 1993-01-01)
      We report 172 dates on osseous material from Paleolithic sites of the East European Plain.
    • Advances in Liquid Scintillation Spectrometry

      Department of Geosciences, The University of Arizona, 1993-01-01
    • Radiocarbon 1994 Price List

      Department of Geosciences, The University of Arizona, 1993-01-01
    • Possibilities for Detailed Dating of Peat Bog Deposits

      Punning, Jaan-Mati; Ilomets, Mati; Koff, Tiiu (Department of Geosciences, The University of Arizona, 1993-01-01)
      Geochemical and palynological data as well as radiocarbon dating were used to study the peat bog deposits in Niinsarre bog, northeast Estonia. The aim of this study was to establish criteria for determining a detailed chronology, which is important, for example, in studying paleoevents and historical monitoring. In some cases, we can use cumulative pollen data, as well as cumulative chemical and peat bulk density data.
    • Problems and Methods of Dating Low-Activity Samples by Liquid Scintillation Counting

      Arslanov, Kh A.; Tertychnaya, T. V.; Chernov, S. B. (Department of Geosciences, The University of Arizona, 1993-01-01)
      The important problem of contamination of old samples by younger 14C necessitates treatment of organic and carbonate samples to ensure more complete removal of contaminating carbon. Here we present studies of chemical procedures for the liquid scintillation method of 14C dating undertaken since 1960 in the former USSR. We discuss new procedures such as lithium carbide synthesis from charred organic samples and benzene synthesis on a V2O5.Al2O3.SiO2 catalyst, as well as memory effect in the carbide synthesis procedure and characteristics of two homemade counters.
    • Problems in Radiocarbon Dating of Soils

      Chichagova, O. A.; Cherkinsky, A. E. (Department of Geosciences, The University of Arizona, 1993-01-01)
      We discuss our progress in three principal applications of 14C dating of recent and fossil soils: 1) new methods; 2) problems of interpreting 14C soil data (e.g.,14C age of soils, age of soils, duration of humus formation, rate of carbon cycling); and 3) 14C analysis of soil organic matter (OM) in pedology and paleogeography (e.g., soil genesis and evolution, humus formation and OM metamorphosis, geochronology and stratigraphy of Late Pleistocene and Holocene sediments). We suggest exploring the above issues in the analysis of each 14C profile in conjunction with paleogeographical data, and by simulation of the carbon cycle in each type of profile.