Table 1.

Mg#’s and O-isotope ratios of host chondrules and relict grains.

Chondrule	Type, texture	Mg# a	+/− b	n (ol, lpx, hpx)c	δ18O	unc.	δ17O	unc.	Δ17O	unc.	Δ17O 2SD	Beam (μm)
Homogeneous
C21	I, PP	99.0	0.2/0.3	2,5,0	−7.7	0.3	−10.9	0.3	−6.93	0.22	0.6	15
C6	I, PP	98.8	0.3/0.8	2,4,0	−6.5	0.4	−9.5	0.4	−6.10	0.34	0.3	15
C28	I, PO	99.6	0.1/0.2	8,0,0	−6.3	0.3	−9.3	0.3	−5.99	0.18	0.4	15
C23	I, POP	98.7	0.3/0.3	3,4,0	−5.7	0.6	−8.8	0.3	−5.84	0.17	0.4	15
C10	I, PO	99.2	0.1/0.2	5,1,0	−6.4	0.5	−9.1	0.3	−5.72	0.16	0.3	15
	relict ol	99.3	n.a.	1,0,0	−5.8	0.2	−9.5	0.3	−6.5	0.3	n.a.	15
	relict ol	99.0	n.a.	1,0,0	−7.3	0.2	−10.3	0.3	−6.6	0.3	n.a.	15
C27	I, PP	99.3	0.5/0.9	6,2,0	−4.5	0.4	−7.9	0.3	−5.57	0.13	0.2	15
C4	I, POP	99.0	0.2/0.3	6,2,0	−5.9	0.4	−8.7	0.4	−5.63	0.31	0.2	15
C26	I, POP	99.0	0.1/0.1	2,3,0	−4.7	0.4	−7.9	0.3	−5.51	0.25	0.4	15
	relict ol	99.3	n.a.	1,0,0	−6.8	0.2	−9.8	0.5	−6.3	0.4	n.a.	15
	relict ol	99.3	n.a.	1,0,0	−6.8	0.2	−10.1	0.5	−6.6	0.4	n.a.	15
	relict ol	99.2	n.a.	1,0,0	−6.3	0.2	−9.9	0.5	−6.6	0.4	n.a.	15
C29	I, PP	99.0	0.3/0.9	2,4,0	−4.8	0.4	−7.9	0.3	−5.43	0.19	0.4	15
C20	I, POP	98.9	0.4/0.2	4,5,0	−5.0	0.3	−7.9	0.2	−5.32	0.18	0.4	15
C13	I, BO	99.1	0.2/0.1	4,0,0	−4.2	0.4	−7.4	0.3	−5.18	0.19	0.3	15
C2	I, POP	98.9	0.3/0.4	4,4,0	−4.8	0.4	−7.7	0.2	−5.19	0.17	0.4	15
C19	I, POP	98.6	0.2/0.2	5,3,0	−4.8	0.3	−7.5	0.2	−4.98	0.14	0.3	15
C30	I, PO	98.8	0.1/0.1	6,0,0	−3.2	0.3	−5.6	0.3	−3.90	0.26	0.2	15
	relict ol	98.7	n.a.	1,0,0	1.0	0.3	−1.3	0.4	−1.9	0.5	n.a.	15
	relict ol	98.4	n.a.	1,0,0	−4.3	0.3	−6.3	0.4	−4.1	0.5	n.a.	15
C18	I, POP	98.7	0.1/0.3	0,3,0	−1.2	0.5	−4.0	0.4	−3.31	0.29	0.4	15
	relict ol	99.3	n.a.	1,0,0	2.8	0.2	0.7	0.5	−0.8	0.4	n.a.	15
	relict ol	99.1	n.a.	1,0,0	2.4	0.2	0.0	0.5	−1.2	0.4	n.a.	15
	relict ol	99.1	n.a.	1,0,0	2.3	0.2	0.0	0.5	−1.2	0.4	n.a.	15
	relict ol	99.1	n.a.	1,0,0	2.0	0.2	−0.5	0.5	−1.5	0.4	n.a.	15
	relict ol	99.1	n.a.	1,0,0	2.4	0.2	−0.4	0.5	−1.6	0.4	n.a.	15
C11	I, PP	93.2	0.2/0.7	0,8,0	1.5	0.3	−1.7	0.3	−2.51	0.18	0.5	15
C12	I, PP	93.6	0.8/0.6	0,7,0	1.3	0.4	−1.7	0.2	−2.37	0.13	0.3	15
C16	I, BO, frag.	99.4	0.2/0.2	8,0,0	−7.9	0.4	−11.1	0.3	−6.99	0.24	0.4	10
C7	I, POP	99.0	0.1/0.2	6,2,0	−6.7	0.5	−9.4	0.4	−5.90	0.24	0.4	10
C8	I, POP	98.9	0.0/0.1	3,2,0	−5.3	0.4	−8.2	0.3	−5.42	0.22	0.4	10
	relict ol	98.8	n.a.	1,0,0	2.2	0.4	1.2	0.4	0.1	0.4	n.a.	10
	relict ol	98.7	n.a.	1,0,0	−2.1	0.4	−5.7	0.4	−4.6	0.4	n.a.	10
	relict ol	98.7	n.a.	1,0,0	−0.9	0.4	−3.8	0.4	−3.3	0.4	n.a.	10
C14	I, POP+BO core	99.0	0.2/0.3	7,4,0	−5.3	0.5	−8.0	0.3	−5.26	0.23	0.6	10
	relict ol	99.1	n.a.	1,0,0	−22.7	0.3	−24.8	0.4	−13.0	0.4	n.a.	10
C1	I, GOP	98.6	0.3/0.3	2,3,0	−3.7	0.5	−6.9	0.4	−4.99	0.33	0.6	10
	relict ol	99.0	n.a.	1,0,0	−14.6	0.6	−17.2	0.6	−9.5	0.5	n.a.	10
	relict lpx	98.8	n.a.	0,1,0	−8.4	0.6	−11.4	0.6	−7.0	0.5	n.a.	10
C25	I, PP	98.8	0.4/0.8	3,4,1	−3.2	0.4	−6.3	0.4	−4.66	0.26	0.6	10
C5	I, POP+BO core	98.6	0.2/0.3	4,4,0	−4.8	0.8	−7.3	0.4	−4.77	0.23	0.4	10
C31	I, PP	97.3	0.5/1.6	1,5,0	0.0	0.4	−3.3	0.4	−3.28	0.23	0.4	10
	relict ol	97.8	n.a.	1,0,0	−3.5	0.5	−7.1	0.6	−5.3	0.4	n.a.	10
	relict ol	97.6	n.a.	1,0,0	−5.2	0.5	−8.9	0.6	−6.2	0.4	n.a.	10
C22	II, PO	69.7	9.3/9.4	7,0,0	2.3	0.4	−1.0	0.3	−2.21	0.15	0.3	15
C17	II, PO	74.4	5.2/4.5	5,0,0	2.8	0.3	−0.6	0.3	−2.09	0.25	0.5	15
	relict ol	99	n.a.	1,0,0	−7.1	0.1	−10.2	0.3	−6.5	0.3	n.a.	15
	relict ol	76.6	n.a.	1,0,0	−3.7	0.1	−7.0	0.3	−5.1	0.3	n.a.	15
	relict ol	71.4	n.a.	1,0,0	0.5	0.1	−2.6	0.3	−2.9	0.3	n.a.	15
Heterogeneous
C9	I, GO	99.4	0.1/0.1	7,0,0	3.5	0.4	1.7	0.3	−0.15	0.20	0.4	10
		99.3	n.a.	0,1,0	−11.3	0.4	−13.7	0.4	−7.8	0.4	n.a.	10
C15	II, PO	98.5	n.a.	1,0,0	−6.6	0.1	−9.8	0.2	−6.3	0.2	n.a.	15
		98.3	n.a.	1,0,0	−3.4	0.1	−6.6	0.2	−4.8	0.2	n.a.	15
		97.7	n.a.	1,0,0	−2.6	0.1	−5.9	0.2	−4.5	0.2	n.a.	15
		91.3	n.a.	1,0,0	−2.4	0.1	−5.4	0.2	−4.1	0.2	n.a.	15
		77.3	n.a.	1,0,0	1.2	0.1	−2.7	0.2	−3.3	0.2	n.a.	15
		66.9	n.a.	1,0,0	1.6	0.1	−2.4	0.2	−3.3	0.2	n.a.	15
		63.4	n.a.	1,0,0	2.5	0.1	−1.0	0.2	−2.3	0.2	n.a.	15
		58.9	n.a.	1,0,0	1.9	0.1	−2.2	0.2	−3.2	0.2	n.a.	15

^aMg# = Mg/(Fe+Mg) molar % of olivine and/or pyroxene in each chondrule.

^bUncertainties represent the range in measured Mg#’s of olivine and/or pyroxenes.

^cNumbers of mineral phases analyzed (olivine, low-Ca pyroxene, and high-Ca pyroxene).