Geochronology of Palaeolithic cultures in the Hiran Valley, Saurashtra, India |
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| Authors: | M Baskaran A R Marathe S N Rajaguru B L K Somayajulu |
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| Institution: | 1. Physical Research Laboratory, Ahmedabad 380009, India;2. Deccan College Postgraduate and Research Institute, Pune 411 006, India;1. Département de Préhistoire, Muséum national d’Histoire naturelle, 1, rue René-Panhard, 75013, Paris, France;2. Centre régional de Recherches archéologiques, 18, rue Charles-Lindbergh, 41000 Blois, France;3. Bureau de recherches géologiques et minières, 3, avenue Claude-Guillemin, 45060 Orléans, France;4. Centro Nacional de Investigacion sobre la Evolucion Humana, 3, Paseo de Atapuerca, 09002 Burgos, Spain;1. Department of History and Museology, College of Applied Arts and Science, Beijing Union University, n° 197, Beituchengxilu, Haidian District, 100191 Beijing, China;2. Museum National de Youjiang, 2, Houlongshanxiang, Chengdonglu, Youjiang District, Bose, 539000 Guangxi, China;1. Àrea de Prehistòria, Universitat Rovira i Virgili (URV), Avinguda de Catalunya, 35, 43002 Tarragona, Spain;2. IPHES, Institut Català de Paleoecologia Humana i Evolució Social, Zona educacional 4, Campus Sescelades URV (Edif. W3), 43007 Tarragona, Spain;3. GQP-CG, Grupo Quaternário e Pré-História do Centro de Geociências (uIandD 73 – FCT), Portugal;4. Unit associated to CSIC, Departamento de Paleobiología, Museo Nacional de Ciencias Naturales (MNCN), Consejo Superior de Investigaciones Científicas (CSIC), Calle José Gutierrez Abascal, 2, 28006 Madrid, Spain;5. Departamento de Paleobiología, Museo Nacional de Ciencias Naturales (MNCN), Consejo Superior de Investigaciones Científicas (CSIC), Calle José Gutierrez Abascal, 2, 28006 Madrid, Spain;6. Laboratorio de Paleomagnetismo (Departamento de Física), Escuela Politécnica Superior – Edificio A1, Universidad de Burgos (UBU), Avenida Cantabria s/n, 09006 Burgos, Spain;7. Departamento de Ciencias Históricas y Geografía, Facultad de Humanidades y Educación, C/ Villadiego, s/n, Universidad de Burgos (UBU), 09001 Burgos, Spain;8. Aix-Marseille University, CEREGE, CNRS UM34, F-13545 Aix-en-Provence, France |
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| Abstract: | The U and Th concentrations of 16 miliolite samples from the Hiran Valley in Saurashtra ranged from 0·3 to 2·14ppm and 0·12 to 0·82ppm respectively. The 234U/238U activity ratio ranged from 1·09 to 1·16, with a mean of 1·12±0·02. It agrees well with the seawater value of 1·14±0·02 within the quoted errors. Nine of the samples were datable by the 230Th/234U method and the ages ranged from 56·8 to 190 Kyr. The problem of chronology of Palaeolithic artifacts is interlinked with the miliolite and other coastal formations. The present investigations permit the development of a chronological framework for the Palaeolithic cultures in the Hiran Valley in particular, and generally in Saurashtra Peninsula. On the basis of radiometric dates and relative chronology, the Lower Palaeolithic cultures fall in a time-bracket of 190-69 Kyr bp. The Middle Palaeolithic industry is much older than 56·8 Kyr bp. The dates obtained for the Lower Palaeolithic cultures are perhaps the oldest reported to date. |
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| Keywords: | miliolite formation palaeolithic tools u series dating sea level changes |
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