Abstract
The Sherubay-Nura section is located in the Karaganda Coal Basin, paleogeographically accretionary complexes of Kazakhstania, a Middle Paleozoic terrane that was colliding with Siberia during the Late Devonian. Rich ammonoid faunas have been discovered in this and other outcrops of the region during Sovietera geological mapping. We present the first field reassessment of the section since the 1980s, elucidating previously unknown deep-water character, gamma-spectrometry response, position of ammonoid limestones in the facies succession, and thermal overprint due to basalt dike intrusions and hydrothermal flushing.