_:n8c41888b12524070a1eba94e57b385f4xb0
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"This &#39;version 4&#39; upload is the 2021-updated poster-version of Figure 1 of the Quaternary International 500 article (version 1). \nThe Figure 2 inset from that paper, is also included here, for completeness. \nCohen, K.M. &amp; Gibbard, P.L. 2019 Global chronostratigraphical correlation table for the last 2.7 million years.\nQuaternary International vol. 500. Fig. 1. https://doi.org/10.1016/j.quaint.2019.03.009\n\nSee abstract and full text of the linked paper for details, research history  and citations/references to materials included in the chart: it makes extensive use of published data sets and schemes, all cited in the main text, many of which have data repositories.\n\nThe 2020 update comprised the ratification of a GSSP for the Middle Pleistocene (introducing the Chibanian Stage), the splitting of the Subseries and Stages column and the way the GSSPs are indicated, and the lowering of the provisional numeric age for the Late Pleistocene Subseries/Stage from 0.129 to 0.126 (affecting the dashed horizontal line that serves as a left-right guide across the chart). The 2021 update corrected a MIS misnumbering at the top of the Olduvai (63, 65) present in older editions, spotted after over a decade of updating the figure/poster. Otherwise, the undivided poster version only differs from the 3-page spread figure in the QI paper in  placement and font size of title and version, placement of logotypes, inclusion of Utrecht University and University of Cambridge logo&#39;s on the poster (continued from earlier releases of the chart), reference to the Quaternary International v-500 2019 paper. \nAll data featured on the chart, is referenced in brief in the text below, and referenced in full and documented in brief in the 2019 paper.\n\nThe 2019 QI-500 paper publication followed up the Episodes 2008 Gibbard &amp; Cohen paper.\nThe 2021 and 2020 edition of the chart (versions 4, 3, 2 in this repository)  follow up editions in 2019 (QI-500/INQUA-Dublin; version 4) and the 2016 IUGS&#39; Cape town IGC version (web-released at the time). \n\nThe release of the poster version via data.mendeley.com, cross-referenced from the QI paper, was coordinated with the QI journal management (Elsevier) and editorship (INQUA). \nUse of the IUGS-ICS and INQUA logo&#39;s was coordinated with the respective organisations (and is continued from earlier releases of the chart). \n\nThe PDF files contain scale-able vector graphics only and therefore should suit reproductions to mini-poster (A4, A3) and poster size  (e.g. A1) formats alike. \nBefore seeking far zoomed in usage of the chart: take notice of the discussion in the QI paper of chosen graphical resolution, versus achievable geological and chronometric correlation accuracy limits."
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