The measured oxygen isotopic compositions of a variety of bulk chondrites and their components. (a) Bulk, matrix, and type I chondrule oxygen isotopic compositions in CM chondrites, CO chondrites, CI chondrites, impact-heated CM and C2 chondrites, Tagish Lake (TL), and WIS 91600 (Rowe et al. 1994; Clayton & Mayeda 1999; Brown et al. 2000; Choe et al. 2010; Russell et al. 2010; Herd et al. 2012; Tenner et al. 2013; Tonui et al. 2014; Chaumard et al. 2018; Yamanobe et al. 2018). The oxygen isotopic signatures of a local solar system reservoir (type I chondrules) and a proposed distal solar system reservoir (WIS 91600, Tagish Lake, CI chondrites) are marked by dotted ellipses. The CO-CM trend is shown by the blue line. The primitive chondritic mineral (PCM) and carbonaceous chondrite anhydrous mineral (CCAM) lines are shown by the gray lines, and the terrestrial fractionation line (TFL) is shown by the black line. The extent of aqueous alteration in bulk and matrix samples is shown by the arrow. (b) Bulk, matrix, and type I chondrule oxygen isotopic compositions in bulk, matrix, and type I chondrules in CR chondrites (Schrader et al. 2011, 2014; Tenner et al. 2015). The CR trend is marked by the red line. The local reservoir in this mixing trend (type I chondrules in the CR chondrites) is different to that in (a), and is marked by a dotted ellipse.