The Upper Cretaceous sediments in Krayshte area are reported to have a wider distribution than previously considered. They are dated using calcareous nannofossils, proving the presence of different parts of the Campanian Stage. Four new formal lithostratigraphic units are introduced and characterized. The Gorna Koznitsa Formation consists of coarse siliciclastic rocks and is probably of Early Campanian Age. The Gorno Gabreshevo Fm. is represented by rhythmic turbidites of Early to Late Campanian Age. The Uglyartsi Fm. is dominated by fine grained sediments – marls, finely laminated claystones and clayey limestones. Its age is Campanian, too. These three units are widespread in the area. The last unit, Shabanitsa Fm., is locally developed in the eastern part of the area. It is built up by loose siliciclastic and mixed hypo-rocks, including non-marine sediments –oncoid limestones and stromatolites of Late Campanian Age. The Upper Cretaceous sediments were deposited most probably in a tectonically controlled asymmetric basin (Babushnitsa-Fucha basin – Zagorchev et al., 2006). The sediments in the eastern parts of the basin exhibit the greatest variety. The coarse clastic sequences cover transgressively over the northern board of the basin, and are covered by predominantly marly deposits. Westwards, they are gradually replaced by marly and carbonate sediments that probably pass to the north into the limestone sequences typical for the western parts of the basin on the territory of Serbia.