apollo. (2026). Blind split-sample counts of magnetic grains, microspherules and nanodiamonds at Lubbock Lake (Holliday et al. 2016) (Version 1.0) [Data set]. Mysteries Department. https://mysteriesdept.com/datasets/DAT0D51XV44074V/blind-split-sample-counts-of-magnetic-grains-microspherules