I'd like to ask if it is now generally accepted practice to normalise
the oxygen isotope scale for carbonate analysis by using values for
NBS18 and NBS19 of -23.00 and -1.95 per mille (VPDB)?

Regards,

Steve Crowley

Department of Earth & Ocean Sciences
University of Liverpool
4 Brownlow Street
Liverpool
L69 3GP
UK

0151 794 5163/5164