Extended Data Fig. 4: Mg,Na phosphate and Na carbonate in millimeter-sized particles.
From: An evaporite sequence from ancient brine recorded in Bennu samples
(a) Optical image of aggregate sample OREX-803013-0, from which Mg,Na phosphate–bearing sample OREX-803085-0 and Na carbonate–bearing sample OREX-803088-0 were separated. The Mg,Na phosphate and Na carbonate are both light-toned and not readily distinguished at this scale. (b) Mg,Na phosphate occurs as broken, blocky grains along a three-dimensional surface indicative of a non-linear vein structure (BSE image with semi-transparent P Kα X-ray map overlay; OREX-803085-0).
