Small shelly fossils in the cambrian basement of the West Siberian geosyneclise

This paper describes for the first time the entire Cambrian skeletal problematics from the parametric well Vostok-1 (Tomsk region, eastern part of the West Siberian Plate) found in the Lower Cambrian Churbiga Formation, Middle Cambrian Pudzhelga Formation, and Upper Cambrian Kondes and Shedelga formations. The investigation has made it possible to detail the biostratigraphic division of the Lower Cambrian in the studied well using the small shelly fossils and to reveal confinement of the main findings of problematic skeletal remains to the shallow carbonate shelf settings.