Abstract: The studied area is located at the southern boundaryof the İzmir-Ankara geosyncline, to the west of Kütahya. Themap area of Budağan Dağ is cut in two segments by an WNWtrending steep fault, the Great Fault (new name). On the oppositesides of the Great Fault the rock assemblages are different ,andthe stratigraphie sequences are formed independently.At the north of the Great Fault the following rock sequence occurs, in descending order :

-Aphanitic limestone (Budağandağ limestone).

-Shale ,and graywacke associated with exotics (Karaçalı formation).

-Diabasic deriviatives associated with exotics, which are differentiated in `exotic zones`;

-Diabasic lava, tuff; bedded chert ,and recrystallized limestone(Ovacık group).

-Lawsonite - albite schist (Kızıltepe formation)

-Ultrabasic

Except the lawsonite - albite schist unit, the others are free ofmetamorphism. All the boundaries between the rock units represent the erosional Stages.

At the south of the Great Fault the rock sequence, in descendingorder, is as followed:

-Aphanitic limestone, tectonic marble (Budağan limestone)

-Metasedimentites (Üyücek formation)

-Quartz-albite-muscovite-chlorite schist (İkibaşlı formation)

The Budağandağ limestone covers the Great Fault ,and has suffered local dinamometamorphism in a zone reflecting the reactivation of the Great Fault.The lawsonite - albite schist is restricted to the northerly lyingdepositional site, as an earlier cycle of sedimentation on the ultrabasic basement. The present criteria eliminate the possibility of an origin of sedimentary overburden / of thrust tectonic. Certain evidences exist for interstitial circulation, resembling a metasomatic process.On the ultrabasic plus lawsonite - albite schist basement, theOvacık group shows marked overstep southwards, so that theuppermost part of the group on the extreme southern margin liesdirectly on the metamorphic sucession. The Karaçalı formationabruptly decreases in thickness toward the south. To the reference horizon of Budağan Dağ limestone, at least, 1300 m thickstratigraphie column is lacking at the south of the Great Fault.It could be argued that tensional movements developed in thecrust just after the emplacement of the ultrabasic as an uppermantel portion. The tensional forces might, at least, have playeda role during / to the end of the ultrabasic emplacement as thecomponent of the driving forces at depths.The isostatic ,and tectonic rearrangement of the ultrabasic yielded a continuously mobile, linear depression. In this trough arhythm of eugeosynclinal ,and miogeosynclinal conditions occured.In the area vertical gravity tectonic is predominating. The soundly established thrust faults are younger than the deposition of diabasic material ,and also that of the younger units. The availableages are Maestrichtian ,and Late Senonnian for the Budağan limestone ,and Karaçalı formation, respectively.