Fig. 2: Summarized S data for K-Pg boundary deposition sites.
From: Reduced contribution of sulfur to the mass extinction associated with the Chicxulub impact event
A Simplified paleogeographic map reconstructed for the Late Cretaceous with K-Pg impact ejecta sites included in this study is highlighted. Different colors represent the proximity of the site to the Chicxulub impact structure, from 500 to 6700 km (modified from Goderis et al. 2021, Globally distributed iridium layer preserved within the Chicxulub impact structure. Sci Adv 7, 1–13 (2021)117. © The Authors, some rights reserved; exclusive licensee AAAS. Distributed under a CC BY-NC 4.0 license http://creativecommons.org/licenses/by-nc/4.0/. Reprinted with permission from AAAS. The map published by Goderis et al. 2021117 is redrawn after Paleoglobe for the Late Cretaceous, 66 million years ago, by C. R. Scotese, PALEOAMP Project 2012122, and updated according to Snedden 2019123, © Cambridge University Press. Reproduced with permission of C. R. Scotese and the Cambridge University Press through PLSclear, respectively). The stars represent K-Pg (Cretaceous-Paleogene) sites for which both bulk S concentration and δ34S profiles around the K-Pg boundary were determined, while circles represent K-Pg sites for which the bulk S concentration and δ34S value were determined in the K-Pg boundary claystone only. The numbers correspond to K-Pg sites: (1) Beloc; (2) Long Canyon; (3) Seven Blackfoot Creek; (4) Frontale; (5) Fonte D’Olio; (6) Siliana; (7) Elles. B–I Simplified lithological profiles with corresponding measured bulk δ34S and S concentration profiles for 8 K-Pg boundary sites, ranging from deep marine to terrestrial environments and from proximal to distal sites. These include: (B) Stevns Klint; (C) Caravaca; (D) Brazos River; (E) Tanis; (F) Dogie Creek (from Maruoka, T., Koeberl, C., Newton, J., Gilmour, I., and Bohor, B.F., 2002, Sulfur isotopic compositions across terrestrial CretaceousTertiary boundary successions, in Koeberl, C., and MacLeod, K.G., eds., Catastrophic Events and Mass Extinctions: Impacts and Beyond: Geological Society of America Special Paper 356, p. 337–344, https://doi.org/10.1130/0-8137-2356-6.33752.). G Brownie Butte (from Maruoka et al. 200252). H Knudsen Coulee (from Cousineau 201356). I Knudsen Farm (from Cousineau 201356). Error bars represent the external uncertainty or 2 SD (based on digestion replicates and repeated measurements) and are often smaller than the markers. The dashed red line represents the base of the K-Pg boundary claystone or equivalent thereof.
