From T.Meijer@RGD.NLTue Apr 29 15:09:01 1997 Date: Thu, 10 Oct 1996 12:46:17 +0200 From: Tom Meijer Reply to: Research in Quaternary Science To: Multiple recipients of list QUATERNARY Subject: C14, species dependant results Is there anything known about species dependant results from C14 (conventional as well as AMS) applied on molluscs ? Tom Meijer --------------------------------------------------------------------------- Tom Meijer e-mail-1: T.Meijer@RGD.NL ; e-mail-2: Meijer.T@Inter.NL.net Rijks Geologische Dienst, Mollusken Kenozoicum, PO-box 157, 2000 AD Haarlem, The Netherlands Phone +31 (0)23 5300351 - Fax +31 (0)23 5401754 --------------------------------------------------------------------------- European Quaternary Malacologists: http://web.inter.NL.net/users/Meijer.T/eqmal.html Nederlandse Malacologische Vereniging: http://web.inter.NL.net/users/Meijer.T/nmv.html (in Dutch) From renelson@COLBY.EDUTue Apr 29 15:09:01 1997 Date: Thu, 10 Oct 1996 07:34:07 -0400 From: "Robert E. Nelson" Reply to: Research in Quaternary Science To: Multiple recipients of list QUATERNARY Subject: Re: C14, species dependant results >Is there anything known about species dependant results from C14 >(conventional as well as AMS) applied on molluscs ? >Tom Meijer I would assume that C-13 corrections applied to any dates should take care of problems created by species-specific isotopic fractionation results. Biological processes that discriminate against heavier isotopes will tend to have approximately double the effect against C-14 that will show up vs. C-13. - Bob Nelson *********************************************** Alter Ego: The Mad Viking! Robert E. Nelson, Chair Phone: [207] 872-3247 Department of Geology FAX: [207] 872-3555 Colby College e-mail: renelson@colby.edu 5804 Mayflower Hill Waterville, Maine 04901-8858 "Good science consists mostly of play disguised as work." - E. O. Wilson *********************************************** From wellsle@CTRVAX.VANDERBILT.EDUTue Apr 29 15:09:01 1997 Date: Thu, 10 Oct 1996 09:53:15 -0600 From: Lisa Wells Reply to: Research in Quaternary Science To: Multiple recipients of list QUATERNARY Subject: Re: C14, species dependant results >>Is there anything known about species dependant results from C14 >>(conventional as well as AMS) applied on molluscs ? >>Tom Meijer Another impact is due to water source and varying resevoir corrections. This is only species dependence in that it is an environmental dependence. For the Peruvian Holocene we observed that estuarine mollusks were in equilibrium with the atmosphere while open ocean mollusks required a large resevoir correction. Lisa Wells ################################ Prof. Lisa Wells wellsle@ctrvax.vanderbilt.edu Voice: 615/322-2986 (office) Facsimile: 615/322-2138 (office) Department of Geology Vanderbilt University Post Office Box 28, Station B Nashville, TN 37235