Glass Beads from Medieval Gao (Mali): New Analytical Data on Chronology, Sources, and Trade
In: Journal of African ArchaeologyAbstract
Excavations at several archaeological sites in and around Gao have resulted in the recovery of thousands of glass beads presumed to have been acquired from glass bead-producing centers through trade. The bead assemblages cover the period from the eighth to the fourteenth century CE. Here we report on the results of compositional analysis by LA-ICP-MS of 100 beads, permitting comparison with the growing corpus of chemical analyses for glass from African and Near Eastern sites. In this analysis, several compositional groupings are recognized. These include two types of plant-ash soda-lime-silica glass (v-Na-Ca), a mineral soda-lime-silica glass (m-Na-Ca), a high-lime high-alumina (HLHA) glass, a mineral soda-high alumina (m-Na-Al), glass, a plant ash soda-high alumina (v-Na-Al) glass and a high lead composition glass. The reconstruction and dating of depositional contexts suggests a shift in glass sources at the end of the tenth century CE. The issue of source identification is discussed and occurrences at other African sites are mapped, providing new data towards an understanding of trade and exchange networks.
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-
Abdurazakov, A.A. 2009. Central Asian glassmaking during the ancient and medieval periods. In: Fuxi, G., Brill, R. & Shouyun, T. (eds.), Ancient Glass Research along the Silk Road. World Scientific, Singapore, pp. 201-219.
-
Aradeon, S. 1989. Al-Sahili: the historian’s myth of architectural technology transfer from North Africa. Journal des Africanistes 59, 99-131.
-
Austen, R. 2015. Regional Study: trans-Saharan trade. In: Benjamin, C. (ed.), The Cambridge World History, vol. 4. Cambridge University Press, Cambridge, pp. 662-686.
-
Babalola, A.B., McIntosh, S.K., Dussubieux, L. & Rehren, T. 2017. Ile-Ife and Igbo Olokun in the history of glass in West Africa. Antiquity 91 (357), 732-750.
-
Babalola, A.B., Dussubieux, L., McIntosh, S. & Rehren, T. 2018a. Chemical analysis of glass beads from Igbo Olokun, Ile-Ife (SW Nigeria): New light on raw materials, production, and interregional interactions. Journal of Archaeological Science 90, 92-105.
-
Babalola, A.B., Rehren, T., Ige, A. & McIntosh, S.K. 2018b. The glass making crucibles from Ile-Ife, SW Nigeria. Journal of African Archaeology 16 (1), 1-29.
-
Brill, R.H. 1963. Ancient glass. Scientific American 209 (5), 120-131.
-
Brill, R.H. 1995. Chemical analysis of some glasses from Jenne-jeno. In: McIntosh, S.K. (ed.), Excavations at Jenné-Jeno, Hambarketolo, and Kaniana (Inland Niger Delta, Mali), the 1981 Season. University of California Press, Berkeley, pp. 252-256.
-
Brill, R.H. 1999. Chemical analyses of early glasses. Vol. 1: catalogue of samples. Vol. 2: tables. Corning Museum of Glass, New York.
-
Brill, R.H., 2003. The glassmakers of Firozabad and the glassmakers of Kapadwanj: Two pilot video projects. Annales du 15e Congrès de l’Association Internationale pour l’Histoire du Verre (Corning, New York, 2001). AIHV, Nottingham, pp. 267-268.
-
Brill, R.H., 2005. Chemical Analyses of some Sasanian Glasses from Iraq. In: Whitehouse, D., Sasanian and Post-Sasanian Glass in the Corning Museum of Glass. Annexe 2. Corning Museum of Glass, New York, pp. 65-95.
-
Brill, R.H. & Stapleton, C.P. 2012. Chemical analyses of early glasses. Vol. 3. Corning Museum of Glass, New York.
-
Callmer, J. 1995. The influx of Oriental beads into Europe during the 8th century AD. In: Rasmussen, M., Lund Hansen, U. & Näsman, U. (eds.), Glass Beads. Cultural History, Technology, Experiment and Analogy. Proceedings of the Nordic glass bead seminar, 1995. Historical-Archaeological Experimental Centre, Lejre, pp. 49-54.
-
Callmer, J. 2003. Beads in Scandinavia in the early and high medieval periods, ca. AD 400-1200. In: Glover, I., Hughes-Brock, H. & Henderson, J. (eds.), Ornaments From the Past: Bead Studies after Beck. Bead Study Trust, London, pp. 38-46.
-
Cissé, M. 2011. Archaeological Investigations of Early Trade and Urbanism at Gao Saney (Mali). Unpublished PhD Thesis, Rice University.
-
Cissé, M., McIntosh, S.K., Dussubieux, L., Fenn, T., Gallagher, D. & Smith, A.C. 2013. Excavations at Gao Saney: New evidence for settlement growth, trade, and interaction on the Niger Bend in the first millennium CE. Journal of African Archaeology 11 (1), 9-37.
-
Davison, C.C. 1972. Glass Beads in African Archaeology: Results of Neutron Activation Analysis, Supplemented by Results of XRay Fluorescence Analysis. Unpublished PhD Thesis, Lawrence Berkeley National Laboratory (LBL-1240).
-
Degryse, P., Boyce, A., Erb‐Satullo, N., Eremin, K., Kirk, S., Scott, R., Shortland, A.J., Schneider, J. & Walton, M. 2010. Isotopic discriminants between late Bronze Age glasses from Egypt and the Near East. Archaeometry 52 (3), 380-388.
-
Dussubieux, L. 2001. L’Apport de l’ablation laser couplée à l’ICP-MS à l’étude du verre archéologique de l’Océan Indien. Unpublished PhD Thesis, Université d’Orléans.
-
Dussubieux, L. & Gratuze, B. 2003. Nature et origine des objets en verre retrouvés à Begram (Afghanistan) et à Bara (Pakistan). In: Bopearachchi, O., Landes, C. & Sachs, C. (eds.), De l’Indus à l’Oxus: Archéologie de l’Asie Centrale. Catalogue de l’Exposition du Musée de Lattes. Imago, Lattes, pp. 315-323.
-
Dussubieux, L., Kusimba, C.M., Gogte, V., Kusimba, S.B., Gratuze, B. & Oka, R. 2008. The trading of ancient glass beads: new analytical data from South Asian and East African soda-alumina glass beads. Archaeometry 50 (5),797-821.
-
Dussubieux, L., Robertshaw, P. & Glascock, M.D. 2009. LA-ICP-MS analysis of African glass beads: laboratory inter-comparison with an emphasis on the impact of corrosion on data interpretation. International Journal of Mass Spectrometry 284, 152-161.
-
Dussubieux, L., Gratuze, B. & Blet-Lemarquand, M. 2010. Mineral soda alumina glass: occurrence and meaning. Journal of Archaeological Science 37 (7), 1645-1655.
-
Dussubieux, L., Wood, M., forthcoming. Indian glass: chronology and distribution in Eastern Africa, in: Kanungo, A.K. and Dussubieux, L. (Eds), Ancient Glass of South and Southeast Asia, IITG and Aryan.
-
Fenn, T.R., Robertshaw, P., Wood, M., Chesley, J. & Ruiz, J. 2011. Glass beads from Igbo-Ukwu, Nigeria: provenance and long-distance trade in the late first millennium AD. In: Fenn, T.R., Applications of Heavy Isotope Research to Archaeological Problems of Provenance and Trade: Cases from Africa and the New World. Unpublished PhD Thesis, University of Arizona.
-
Feveile, C., Sode, T. & Schnell, U. 2010. An investigation on segmented, metal-foiled glass beads and blown, mirrored glass beads from Ribe, Denmark. In: Theune, C., Biermann, F., Struwe, R. & Jeute, G.H. (eds.), Zwischen Fjorden und Steppe: Festschrift für Johan Callmer zum 65. Geburtstag. Marie Leidorf, Rahden, pp. 319-328.
-
Foster, H.E. & Jackson, C.M., 2009. The composition of ‘naturally coloured’ late Roman vessel glass from Britain and the implications for models of glass production and supply. Journal of Archaeological Science 36 (2), 189-204.
-
Foy, D., Picon, M., Vichy, M. & Thirion-Merle, V. 2003. Caractérisation des verres de la fin de l’Antiquité en Méditerranée occidentale: l’émergence de nouveaux courants commerciaux. In: Foy, D. & Nenna, M.-D. (eds.), Echanges et commerce du verre dans le monde antique. Actes du colloque de l’AIHV, Aix-en-Provence et Marseille, juin 2001. Monographies Instrumentum 24. Monique Mergoil, Montagnac, pp. 41-85.
-
Freestone, I.C. 1991. Looking into glass. In: Bowman, S. (ed.), Science and the Past. British Museum Press, London, pp.37-56.
-
Freestone, I.C. 2006. Glass production in Late Antiquity and the Early Islamic period: a geochemical perspective. In: Maggeti, M. and Messiga, B. (eds.) Geomaterials in Cultural Heritage. Geological Society, London, Special Publications, 257(1), 201-216.
-
Freestone, I.C., Gorin-Rosen, Y. & Hughes, M.J. 2000. Primary glass from Israel and the production of glass in late Antiquity and the early Islamic period, In: La Route du verre. Ateliers primaires et secondaires du second millénaire av. J.-C. au Moyen Âge. Colloque organisé en 1989 par l’Association française pour l’Archéologie du Verre (AFAV). TMO 33. Maison de l’Orient et de la Méditerranée Jean Pouilloux, Lyon 33 (1), pp. 65-83.
-
Freestone, I.C., Wolf, S. & Thirlwall, M. 2005. The production of HIMT glass: elemental and isotopic evidence. Annales du 16e Congrès de l’Association Internationale pour l’Histoire du Verre (London, UK, 2003). AIHV, Nottingham, pp. 153-157.
-
Ganio, M., Boyen, S., Fenn, T., Scott, R., Vanhoutte, S., Gimeno, D. & Degryse, P. 2012. Roman glass across the Empire: an elemental and isotopic characterization. Journal of Analytical Atomic Spectrometry 27 (5), 743-753.
-
Giachet, M.T., Gratuze, B., Ozainne, S., Mayor, A. & Huysecom, E. 2019. A Phoenician glass eye bead from 7th-5th c. cal BCE Nin-Béré 3, Mali: Compositional characterisation by LA-ICP-MS. Journal of Archaeological Science: Reports 24, 748-758.
-
Gill, M. S. 2017. A single ingredient for primary glass production: Reassessing traditional glass manufacture in Northern India. Journal of Glass Studies 59, 249-259.
-
Gratuze, B. & Barrandon, J.N. 1990. Islamic glass weights and stamps: analysis using nuclear techniques. Archaeometry 32 (2), 155-162.
-
Henderson, J., McLoughlin, S. & McPhail, D. 2004. Radical changes in Islamic glass technology: evidence for conservatism and experimentation with new glass recipes from early and middle Islamic Raqqa, Syria. Archaeometry 46, 439-468.
-
Henderson, J., Chenery, S., Faber, E. & Kröger, J. 2016. The use of electron probe microanalysis and laser ablation-inductively coupled plasma-mass spectrometry for the investigation of 8th-14th century plant ash glasses from the Middle East. Microchemical Journal 128, 134-152.
-
Hunwick, J.O. 1980. Gao and the Almoravids: a hypothesis. In: Swartz, B. & Dumett, R. (eds.), West African Cultural Dynamics: Archaeological and Historical Perspectives. Mouton, The Hague, pp. 413-430.
-
Hunwick, J.O. 1985. Sharīʿa in Songhay: the replies of al-Maghīlī to the questions of Askia al-Ḥājj Muḥammad (Vol. 5). Oxford University Press, USA.
-
Hunwick, J.O. 1994. Gao and the Almoravids revisited: Ethnicity, political change and the limits of interpretation. Journal of African History 35 (2), 251-273.
-
Insoll, T. 1996. Islam, Archaeology and History, Gao Region (Mali) ca. AD 900-1250. Cambridge Monographs in African Archaeology 39. BAR, Oxford.
-
Insoll, T. 2000. Urbanism, Archaeology and Trade. Further Observations on the Gao Region (Mali). The 1996 Field Season Results. Cambridge Monographs in African Archaeology. BAR, Oxford.
-
Insoll, T. & Shaw, T. 1997. Gao and Igbo-Ukwu: Beads, interregional trade, and beyond. African Archaeological Review 14 (1), 9-23.
-
Kanungo, A.K. 2001. Glass beads in Indian archaeology: An ethnoarchaeological approach. Bulletin of the Deccan College Post-Graduate and Research Institute 60-61, 337-353.
-
Kock, J. & Sode, T. 1995. Glass, Glassbeads and Glassmakers in Northern India. THOT Print, Vanlose.
-
Lankton, J.W., Ige, O.A. &d Rehren, T. 2006. Early primary glass production in southern Nigeria. Journal of African Archaeology 4 (1), 111-138.
-
Lankton, J.W., Nixon, S., Robertshaw, P. & Dussubieux, L. 2017. Beads. In: Nixon, S. (ed.), Essouk-Tadmekka: An Early Islamic Trans-Saharan Market Town. Brill, Leiden, pp. 160-173.
-
Lankton, J., Robertshaw, P., Dussubieux, L. & Nixon, S. 2017. Vessel and bead glass chemical compositional analysis. In: Nixon, S, (ed.), Essouk-Tadmekka: An Early Islamic Trans-Saharan Market Town. Appendix H. Brill, Leiden, pp. 364-369.
-
Levtzion, N. & Hopkins, J.F.P. 1981. Corpus of Early Arabic Sources for West African History. Cambridge University Press, Cambridge.
-
Lewicki, T. 1962. L’Etat nord-africain de Tahert et ses relations avec le Soudan occidental à la fin du VIIIe et au IXe siècle. Cahiers d’Etudes Africaines 2, 513-535.
-
Lewicki, T. 1976. Les liaisons maghrebines sahariennes et soudanaises de la ville de Ouargla au moyen age. Etudes Maghrebines et Soudanaises I, Prace orientalistyczne XXII, 7-94.
-
Magnavita, S. 2016. Early trans-Saharan trade in the light of archaeometric research. Society of Africanist Archaeologists biennial meeting, Toulouse, 28 June.
-
Magnavita, S. 2019. Beads and Pendants. In: Haour, A. (ed.), Two Thousand Years in Dendi, Northern Benin: Archaeology, History, Memory. Brill, Leiden. pp. 199-205.
-
Mauny, R. 1951. Note d’Archéologie au sujet de Gao. Bulletin d’IFAN, ser.B, vol XIII, 837-852.
-
Mayor, A., Huysecom, E., Ozainne, S. & Magnavita, S. 2014. Early social complexity in the Dogon Country (Mali) as evidenced by a new chronology of funerary practices. Journal of Anthropological Archaeology 34, 17-41.
-
McIntosh, S.K. 2016. Gao Empire. In: MacKenzie, J. (ed.), The Encyclopedia of Empire. Wiley online.
-
Mirti, P., Casoli, A. & Appolonia, L. 1993. Scientific analysis of Roman glass from Augusta Praetoria. Archaeometry, 35 (2), 225-240.
-
Mirti P., Pace M., Negro Ponzi M.M. & Aceto, M. 2008. ICP-MS analysis of glass fragments of Parthian and Sasanian epoch from Seleucia and Veh Ardasir (Central Iraq). Archaeometry 50 (3), 429-450.
-
Mirti P., Pace M., Malandrino M. & Negro Ponzi, M.M. 2009. Sasanian glass from Veh Ardašī. Journal of Archaeological Science 36 (4), 1061-1069.
-
Nenna, M.D. 2014. Egyptian glass abroad: HIMT glass and its markets. In: Bailey, J., Jackson, C., Keller, D. & Price, J. (eds.), Neighbours and successors of Rome: Traditions of glass production and use in Europe and the Middle East in the later first millennium AD. Oxbow Books, Oxford, pp.177-193.
-
Nixon, S. (ed.) 2017. Essouk-Tadmekka: An Early Islamic Trans-Saharan Market Town. Brill, Leiden.
-
Nixon, S. & Lankton, J. 2017. Glass bead tables. In: Nixon, S. (ed.), Essouk-Tadmekka: An Early Islamic Trans-Saharan Market Town. Brill, Leiden, pp. 358-363.
-
Ogundiran, A. & Ige, O.A. 2015. Our ancestors were material scientists: Archaeological and geochemical evidence for indigenous Yoruba glass technology. Journal of Black Studies 46 (8), 751-772.
-
Phelps, M., Freestone, I.C., Gorin-Rosen, Y. & Gratuze, B. 2016. Natron production and supply in the late antique and early medieval Near East: The effect of the Byzantine-Islamic transition. Journal of Archaeological Science 75, 57-71.
-
Popelka-Filcoff, R., Glascock, M., Robertshaw, P. & Wood, M. 2005. Laser Ablation ICP-MS of African glass trade beads. In: Speakman, R. & Neff, H. (eds.), Laser Ablation-ICP-MS in Archaeological Research. University of New Mexico Press, Albuquerque, pp. 85-94.
-
Rehren, T. & Pusch, E.B. 2005. Late bronze age glass production at Qantir-Piramesses, Egypt. Science 308 (5729), 1756-1758.
-
Rehren, T., Osório, A. & Anarbaev, A. 2010. Some notes on early Islamic glass in Eastern Uzbekistan. In: Zorn, B. & Hilgner, A. (eds.), Glass along the Silk Road from 200 BC to AD 1000. Verlag des Römisch-Germanischen Zentralmuseums, Mainz, pp. 93-103.
-
Reimer, P.J., Bard, E., Bayliss, A., Beck, J.W., Blackwell, P.G., Bronk Ramsey, C., Grootes, P.M., Guilderson, T.P., Haflidason, H., Hajdas, I., Hatt, C., Heaton, T.J., Hoffmann, D.L., Hogg, A.G., Hughen, K.A., Kaiser, K.F., Kromer, B., Manning, S.W., Niu, M., Reimer, R.W., Richards, D.A., Scott, E.M., Southon, J.R., Staff, R.A., Turney, C.S.M. & van der Plicht, J. 2013. IntCal13 and Marine13 Radiocarbon Age Calibration Curves 0-50,000 Years cal BP. Radiocarbon 55 (4), 1869-1887.
-
Robertshaw, P., Magnavita, S., Wood, M., Melchiorre, E., Popelka-Filcoff, R.S. & Glascock, M.D. 2009. Glass beads from Kissi (Burkina Faso): chemical analysis and archaeological interpretation. In: Magnavita, S., Koté, L., Breunig, P. & Idé, O.A. (eds.), Crossroads / Carrefour Sahel. Cultural and Technological Developments in First Millennium BC/AD West Africa. Journal of African Archaeology Monograph Series 2. Africa Magna Verlag, Frankfurt am Main, pp. 105-118.
-
Robertshaw, P., Wood, M., Melchiorre, E., Popelka-Filcoff, R.S. & Glascock, M.D. 2010a. Southern African glass beads: chemistry, glass sources and patterns of trade. Journal of Archaeological Science 37 (8), 1898-1912.
-
Robertshaw, P., Benco, N., Wood, M., Dussubieux, L., Melchiorre, E. & Ettahiri, A. 2010b. Chemical analysis of glass beads from medieval Al‐basra (Morocco). Archaeometry 52 (3), 355-379.
-
Schibille, N., Meek, A., Wypyski, M.T., Kröger, J., Rosser-Owen, M. & Haddon, R.W. 2018. The glass walls of Samarra (Iraq): Ninth-century Abbasid glass production and imports. PLOS One 13 (8), e0201749.
-
Schlick-Nolte, B. & Werthmann, R. 2003. Glass vessels from the burial of Nesikhons. Journal of Glass Studies 45, 11-34.
-
Shaw, C.T. 1970. Igbo Ukwu. Faber, London.
-
Shortland, A., Schachner, L., Freestone, I. & Tite, M. 2006. Natron as a flux in the early vitreous materials industry: sources, beginnings and reasons for decline. Journal of Archaeological Science 33 (4), 521-530.
-
Shortland, A.J., Kirk, S., Eremin K., Degryse, P. & Walton, M. 2018. The analysis of Late Bronze Age glass from Nuzi and the question of the origin of glass-making. Archaeometry 60 (4), 764-783.
-
Smirniou, M. & Rehren, T. 2011. Direct evidence of primary glass production in Late Bronze Age Amarna, Egypt. Archaeometry 53(1), 58-80.
-
Smirniou, M., Rehren, T. & Gratuze, B. 2017. Lisht as a New Kingdom glass‐making site with its own chemical signature. Archaeometry 60 (3), 502-516.
-
Sutton, J.E.G. 1991. The international factor at Igbo Ukwu. African Archaeological Review 9 (1), 145-160.
-
Swan, C.M., Rehren, T., Lankton, J., Gratuze, B. &d Brill, R.H. 2017. Compositional observations for Islamic glass from Sīrāf, Iran, in the Corning Museum of Glass collection. Journal of Archaeological Science Reports 16, 102-116.
-
Takezawa, S. & Cissé, M. (eds.) 2017. Sur les traces des grands empires: recherches archéologiques au Mali. Editions Harmattan, Paris.
-
Tite, M.S. & Shortland, A.J. 2003. Production technology for copper‐and cobalt‐blue vitreous materials from the New Kingdom site of Amarna – a reappraisal. Archaeometry 45 (2), 285-312.
-
Wadia, D.N. 1975. Geology of India, fourth ed. Tata Mac Graw Hill Publishing Co., New Delhi.
-
Wood, M. 2011. A glass bead sequence for southern Africa from the 8th to the 16th century AD. Journal of African Archaeology 9 (1), 67-84.
-
Wood, M. 2016. Glass beads from pre-European contact sub-Saharan Africa: Peter Francis’s work revisited and updated. Archaeological Research in Asia 6, 65-80.
-
Wood, M. 2018. How Small the World. In: Ekblom, A., Isendahl, C. & Lindholm, K.J. (eds.), The Resilience of Heritage: Cultivating a Future of the Past. Essays in Honour of Professor Paul J.J. Sinclair. Uppsala University, Uppsala, pp. 307-322.
-
Wood, M., Panighello, S., Orsega, E.F., Robertshaw, P., van Elteren, J.T., Crowther, A., Horton, M. & Boivin, N. 2017. Zanzibar and Indian Ocean trade in the first millennium CE: the glass bead evidence. Archaeological and Anthropological Sciences 9 (5), 879-901.
-
Wypyski, M.T. 2015. Chemical analysis of early Islamic glass from Nishapur. Journal of Glass Studies 57, 121-136.
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Glass Beads from Medieval Gao (Mali): New Analytical Data on Chronology, Sources, and Trade
In: Journal of African ArchaeologyAbstract
Excavations at several archaeological sites in and around Gao have resulted in the recovery of thousands of glass beads presumed to have been acquired from glass bead-producing centers through trade. The bead assemblages cover the period from the eighth to the fourteenth century CE. Here we report on the results of compositional analysis by LA-ICP-MS of 100 beads, permitting comparison with the growing corpus of chemical analyses for glass from African and Near Eastern sites. In this analysis, several compositional groupings are recognized. These include two types of plant-ash soda-lime-silica glass (v-Na-Ca), a mineral soda-lime-silica glass (m-Na-Ca), a high-lime high-alumina (HLHA) glass, a mineral soda-high alumina (m-Na-Al), glass, a plant ash soda-high alumina (v-Na-Al) glass and a high lead composition glass. The reconstruction and dating of depositional contexts suggests a shift in glass sources at the end of the tenth century CE. The issue of source identification is discussed and occurrences at other African sites are mapped, providing new data towards an understanding of trade and exchange networks.
| All Time | Past Year | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 665 | 386 | 21 |
| Full Text Views | 103 | 72 | 9 |
| PDF Views & Downloads | 118 | 71 | 17 |