Table 1 Oxygen isotope composition of impact-related materials from this study

	δ¹⁸O (‰)^a	δ¹⁷O (‰)	Δ¹⁷O (‰)^a	n
Tektites
SBM-11	11.18	5.83	−0.088	1
SBM-11 replicate^b	9.62	5.02	−0.090	1
SBM-23	10.98	5.72	−0.080	1
SBM-35	12.46	6.50	−0.084	2
SBM-44	10.95	5.71	−0.086	2
SBM-88	12.57	6.55	−0.096	3
SBM-192	11.79	6.15	−0.085	1
MM-60	10.85	5.65	−0.092	2
MM-67	10.84	5.66	−0.070	1
CHBM-5	11.81	6.15	−0.086	2
CHBM-6	9.44	4.92	−0.078	1
CHBM-7^b	10.13	5.30	−0.086	2
MCB-2	12.14	6.33	−0.091	2
LM-1	11.10	5.79	−0.085	2
MOLD-SB^b	11.08	5.30	−0.105	1
MOLD-SB replicate^b	10.45	5.79	−0.092	1
MOLD-SB replicate^b	11.12	5.47	−0.095	1
Irghizites
IRG-IZ1	12.76	6.58	−0.170	2
IRG-IZ3	11.85	6.12	−0.145	2
IRG-IZ3 replicate	13.36	6.92	−0.141	1
IRG-IZ3 replicate	13.05	6.76	−0.135	1
IRG-IZ3 replicate^b	12.98	6.76	−0.147	1
IRG-IZ9	14.42	7.42	−0.198	2
IRG-IZ9 replicate^b	13.59	7.03	−0.201	1
IRG-IZ9 replicate^b	13.49	7.01	−0.173	1
IR-2	14.24	7.33	−0.200	1
IR-4	12.30	6.33	−0.175	1
IR-8	12.49	6.44	−0.166	1
IR-9	12.09	6.18	−0.219	1
IR-11	12.90	6.63	−0.188	1
IR-12	12.10	6.22	−0.178	1
Basic splash forms
IRG-M4	8.01	4.17	−0.068	2
IRG-M4 replicate	9.18	4.76	−0.104	1
IR-10	8.47	4.42	−0.066	1
IR-13	8.26	4.30	−0.075	1
IR-14	8.56	4.45	−0.084	1
Composite splash forms
IR-7	7.03	3.63	−0.094	1

^aEstimated measurement uncertainties are <0.3‰ and <0.008‰ for δ¹⁸O and Δ¹⁷O, respectively, based on the typical reproducibility (1 s.d.) of results for the standard reference material NBS 28 throughout the analytical sessions, except for samples denoted with superscript ‘b’
^bSamples analyzed with an improved extraction line (see text for details). Estimated measurement uncertainties are <0.15‰ and <0.007‰ for δ¹⁸O and Δ¹⁷O, respectively, based on the typical reproducibility (1 s.d.) of measurement results for San Carlos olivine

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