Here's the press release[1] being echoed. Cleland's CV[2] seemingly specs the paper as: > “Historical Natural Kinds and Mineralogy: Systematizing contingency

Here's the press release[1] being echoed. Cleland's CV[2] seemingly specs the paper as: > “Historical Natural Kinds and Mineralogy: Systematizing contingency in the context of necessity (Cleland,C. E., Hazen, R. M.&S.M. Morrison), Proceedings of the National Academy of Sciences(PNAS)(2021) (in press). But it doesn't seem to be available yet. So why do the press release now... shrug? These scholar hits[3] look related: "An evolutionary system of mineralogy."'s "Part I", "Part II", and (earlier) "Proposal for a classification of planetary materials based on natural kind clustering". The currently unlinked "Part II" seems available here[4] (and on sci-hub of course). Here's a GPlates animation[5] (just for pretty) with mineral locations marked, from a recent related paper[6]. [1] https://carnegiescience.edu/news/scientists-and-philosopher-team-propose-new-way-categorize-minerals https://carnegiescience.edu/news/scientists-and-philosopher-... [2] https://www.colorado.edu/philosophy/sites/default/files/attached-files/cv_cleland.pdf https://www.colorado.edu/philosophy/sites/default/files/atta... [3] https://scholar.google.com/scholar?as_ylo=2019&q=Hazen+Morrison+Cleland https://scholar.google.com/scholar?as_ylo=2019&q=Hazen+Morri... [4] http://www.minsocam.org/msa/Ammin/AM_Preprints/7447HazenPreprint.pdf http://www.minsocam.org/msa/Ammin/AM_Preprints/7447HazenPrep... [5] https://4d.carnegiescience.edu/sites/default/files/2020-04/Morrison-etal-Minerals-GPlates_small.mp4 https://4d.carnegiescience.edu/sites/default/files/2020-04/M... [6] https://www.frontiersin.org/articles/10.3389/feart.2020.00208/full https://www.frontiersin.org/articles/10.3389/feart.2020.0020...