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Dahl et al.
Reorganisation of Earth’s biogeochemical cycles
briefly oxygenated the oceans 520 Myr ago
Figure S-3 Photomicrographs of samples (A358, A368 and A393) from the Sukharikha River section show microstructure and
cathodoluminescent (CL) characteristics. Recrystallised shell fragments are embedded in a micrite matrix. Photographs are taken from thin
section using multi-composite exposure (HDR). Selected geochemical data are summarised; n.d. – no data.
Dahl et al. (2017) Geochem. Persp. Let. 3, 210-220 | doi: 10.7185/geochemlet.1724
© 2017 European Association of Geochemistry