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13]C values relative to the international standard, Pee Dee Belemnite (Craig 1957).
One plesiosaur's stomach cavity included belemnite remains, but 92 percent of the contents were crushed shells of thumb-size clams and snails.
Isotope data were expressed relative to Vienna Pee Dee Belemnite for [delta][sup.
The isotope ratios were expressed using the 'delta' notation ([delta]), with units of per mL or parts per thousand (%o), relative to the marine limestone fossil Pee Dee Belemnite standard (Craig 1953) for [delta][sup.
Isotope results are reported in the conventional [delta] notation as per mil deviation from the carbon isotopic ratio of the Pee Dee Belemnite (Peterson and Fry 1987).
Some ichthyosaur remains contain hundreds of belemnite shells and thousands of their hooks, says Martin.
2] from a reference tank calibrated previously versus a standard reference material (Pee Dee Belemnite, PDB; NBS-19).
where X = sample; and S = the marine carbonate standard Vienna Peedee belemnite, VPDB (Gao et al.
The standard materials to which the samples are compared are Pee Dee Belemnite for carbon, air [N.
All isotopic data are given in the conventional delta notation, units of parts per thousand (%) relative to the Vienna Pee Dee Belemnite standard as follows:
All measurements were reported in standard Vienna Pee Dee Belemnite (VPDB) and notation as [differential][per thousand] (per mil), where