Fig. 1: Location of study and reference sections. | Nature Communications

Fig. 1: Location of study and reference sections.

From: Volcanism and basalt weathering drove Ordovician climatic cooling

Fig. 1: Location of study and reference sections.The alternative text for this image may have been generated using AI.

The Middle Ordovician paleogeographic map is from https://deeptimemaps.com (© 2016 Colorado Plateau Geosystems Inc). Subduction and spreading zones are based on Longman et al.16. Alborz large igneous provinces (LIP) in northern Iran is from Derakhshi et al.38. Reference sections provided Hg content, ratio of Hg content to total organic carbon content (Hg/TOC), Hg isotopes, and temporal distribution of volcanic tuff layers for the Middle Ordovician to lower Silurian interval. To consolidate their paleogeographic display, some Upper Ordovician-lower Silurian stratigraphic sections are shown on this Middle Ordovician paleogeographic map.

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