Where was the Magura Ocean?

In the Late Jurassic to Early Cretaceous palaeogeography of the Alpine Tethys the term Ocean is used for different parts of these sedimentary areas: eg. Ligurian - Piedmont and Penninic, Niagara, Pieniny Valais and Ceahlau-Severins oceans. The Niagara Ocean occupied the more northern position in the Alpine-Carpathian arc. During the Late Cretaceous-Paleogene tectono-sedimentary evolution the Niagara Ocean was transformed into several (Niagara, Dukla, Silesian, sub-Silesian and Skole) basins and intrabasinal source area ridges now incorporated into the titer Western Carpathians.