Firths are geomoiphological and hydrological sites typical for flat, neutral coast of no tidal sea basins. There in the greatest extend is preserved the geological column of the correlative Pleistocene- Holocene sediments. They make possible to reveal the Quaternary evolution of the contact zone „land-sea“. Firths are one of the most reliable indicators for the Quaternary Earth crust movements.
Along the Black Sea coast most widely are developed the firths in the north - west and the west periphery, where they form a classic firth type coast.
This report examines the results of complex studies of Batova river firth, located (developed) on the North Bulgarian Black Sea coast.