Study of Quaternary stratigraphy and geochronology in the Ponto-Caspian region dates back to the XIX century. The basic stratigraphic scale was first suggested by N.I. Andrusov and then modified by numerous researchers. This scale is based on the study of outcrops, many of which represent stratotypes for certain stratigraphic units, that were formed on the sea bottom and later exposed by tectonic uplift on coastal terraces. Many of them were observed during the IGCP 521, IGCP 610, and INQUA 0501 projects that established an international team of multidisciplinary scientists (about 300 people from 27 countries). The INQUA IFG 1709F POCAS project continue this fieldwork series.