Journal of Palaeogeography

Table 1 Composition of reference materials and measurement results/uncertainties

From: First record of stable isotopes (δ¹³C, δ¹⁸O) and element ratios (Mg/Ca, Sr/Ca) of Middle to Late Jurassic belemnites from the Indian Himalayas and their potential for palaeoenvironmental reconstructions

	Sr/Ca				Mg/Ca				Reference
	Recomm. (mmol/mol)	U (mmol/mol)	Measured (mmol/mol)	u (mmol/mol)	Recomm. (mmol/mol)	U (mmol/mol)	Measured (mmol/mol)	u (mmol/mol)	Reference
JCp-1	8.838	0.089	8.851	0.0155	4.199	0.132	4.229	0.024	Hathorne et al. 2013
JCt-1	1.680	0.055	1.814	0.1300	1.289	0.092	1.252	0.107	Hathorne et al. 2013
ECRM-752			0.221	0.0004	3.824	0.095	3.778	0.008	Greaves et al. 2008
Cal-S	0.297	Info value	0.307	0.0002	9.7	Info value	8.918	0.019	Jochum et al. 2007; Info values

Recomm. Recommended value (robust median); Measured Measured value; U Expanded uncertainty; u Measurement uncertainty

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