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Bonjour Cedric, If the sandstone is acidic, it could have contributed to leaching of minerals from the tooth; the relatively less well-mineralized enamel and dentine will have been more heavily affecting, leaving a shell of enamel. There should be more info on differential preservation and matrix composition here: Stiner, M.C., Kuhn, S. L. , Surovell, T.A., Goldberg, P., Meignen, L., Weiner, S., Bar-Yosef, O., 2001. Bone Preservation in Hayonim Cave (Israel): a Macroscopic and Mineralogical Study. Journal of Archaeological Science 28. Happy hunting, Ariane Dr. Ariane Burke, Professeur Titulaire, Dept. d'anthropologie, Université de Montréal, C.P. 6128, Succursale Centre-Ville Montreal, QC Canada, H3C 3J7 Tel. 514-343-6574 http://archeozoologie.anthro.umontreal.ca/ ________________________________ From: Analysis of animal remains from archaeological sites on behalf of Cedric Beauval Sent: Wed 2013-02-06 1:55 AM To: [log in to unmask] Subject: [ZOOARCH] Tooth in sandstone Dear ZOOARCHers This tooth (http://zooarchaeology.ning.com/forum/topics/tooth-preservation-in-sandstone) was found in a sandstone Paleolithic level at Brive (France). It is a print of an upper molar from a bovid. The tooth is almost completely destroyed, but you can see some fragment of enamel. There is no faunal remain in this layer but few small burnt bones. Does anyone have seen such a tooth preservation ? What kind of taphonomic process may be involved ? Do you have some references ? Thank you very much Photos : http://zooarchaeology.ning.com/forum/topics/tooth-preservation-in-sandstone Cédric BEAUVAL Directeur [log in to unmask] <mailto:[log in to unmask]> 06 45 83 39 64 SARL ARCHÉOSPHÈRE Opérateur d'archéologie préventive, société agréée par le Ministère de la Culture et de la Communication Agrément en anthropologie funéraire (toutes périodes) et Paléolithique Membre du SNPA (Syndicat National des Professionnels de l'Archéologie) ARCHÉOSPHÈRE 20 rue Suffren 33300 BORDEAUX Tél : 05 56 04 14 98 [log in to unmask] www.archeosphere.com <http://www.archeosphere.com/>