Abstract
The article presents preliminary results of field research at the multi-period settlement of Kostomar, located in the northern part of Pavlodar Region. It contains layers from the Late to Early Bronze Age and the Late Mesolithic, representing remnants of the lithic industry of the Shiderty archaeological culture. This is the most prominent complex of Early Holocene lithic industries known in Northern and Central Kazakhstan, distinguished by several typological features and the raw materials used. It is localized within the northeastern part of the Kazakh Uplands and the transboundary zone of the Middle Irtysh region. The settlement is actively being destroyed by flood processes and requires urgent study as one of the most significant sites for understanding Mesolithic and Early Bronze Age monuments in northern Kazakhstan.