1. İstanbul Teknik Üniversitesi, Maden Fakültesi, Jeoloji Bölümü, Avrasya Yerbilimleri Enstitüsü, Ayazağa 34469 İstanbul, Turkey; Honorary Research Associate, The Natural History Museum, Cromwell Road, London SW7 5BD, UK.
2. Department of Earth and Environmental Sciences, Univiersity of Windsor, Windsor, ON N9B 3P4, Canada.