The stratigraphy of the uppermost levels of the Menderes Massif is controversial and within its details lie vital constraints to the tectonic evolution of south-western Turkey. Our primary study was carried out in four reference areas along the southern and eastern Menderes Massif. These areas lie in the upper part of the Menderes metamorphic cover and have a clear stratigraphic relationship and contain datable fossils. The first one, in the Akbük±Milas area, is located south-east of Bafa Lake where the Milas, then Kõzõlag AE aç and Kazõklõ formations are well exposed. There, the Milas formation grades upwards into the Kõzõlag AE aç formation. The contact between the Kõzõla-g AE aç and the overlying Kazõklõ formation is not clearly seen but is interpreted as an unconformity. The Milas and Kõzõlag AE aç formations are also found north of Mug AE la, in the region of Yatag AE an and Kavaklõdere. In these areas, the Milas formation consists of schists and conformably overlying platform-type, emery and rudist-bearing marbles. Rudists form the main palaeontological data from which a Santonian±Campa-nian age is indicated. The Kõzõlag AE aç formation is characterized by reddish±greyish pelagic marbles with marly-pelitic interlayers and coarsening up debris flow deposits. Pelagic marbles within the formation contain planktonic foraminifera and nanoplankton of late Campanian to late Maastrichtian age. The Kazõklõ formation is of flysch type and includes carbonate blocks.