“…The average bone/soil ratio of As calculated as 2.5:1. The _ Ikiztepe bone/soil ratio is considerably lower than the values of Grattan et al (2002Grattan et al ( , 2005. However, it is comparable with that of Oakberg et al (2000) (our calculation is 7.3:1 but it was calculated as 3:1 by Grattan et al, 2005 and as 9.5:1 by Grattan et al, 2002), in which arsenic was diagenetic in origin (Pike and Richards, 2002).…”