Human Geophagia, Calabash Chalk and Undongo: Mineral Element Nutritional Implications

• Peter W. Abrahams ,

  * E-mail: pwa@aber.ac.uk

  Affiliation Institute of Geography and Earth Sciences, Aberystwyth University, Ceredigion, United Kingdom

  ⨯
• Theo C. Davies,

  Current address: Department of Mining and Environmental Geology, University of Venda, Thohoyandou, South Africa

  Affiliation Department of Geology and Mining, University of Jos, Jos, Nigeria

  ⨯
• Abiye O. Solomon,

  Affiliation Department of Geology and Mining, University of Jos, Jos, Nigeria

  ⨯
• Amanda J. Trow,

  Affiliation Institute of Geography and Earth Sciences, Aberystwyth University, Ceredigion, United Kingdom

  ⨯
• Joanna Wragg

  Affiliation British Geological Survey, Keyworth, Nottingham, United Kingdom

  ⨯