The present study is focused on sequence stratigraphy of Turonian age northern Jordan representing by Wadi Es Sir Formation. The Wadi Es Sir Formation consists of well bedded massive limestone, dolomitic limestone and dolomite. Eight microfacies types have been recognized based on detailed petrographic analysis of the deposits. These are mudstone, gastropoda peloidal packstone, algal-lithoclast wackestone to packstone, peloidal foraminifera wackestone to packstone, bioclastic wackestone to packstone foraminifer wackestone, rudist framestone and pelletal grainstone. These facies reflect three different association environments include restricted marine, shallow open marine and shoal environments. Sequence stratigraphic analysis identified 4th order cycles which are generally asymmetrical and consist of Transgressive Systems Tract (TST) represented by shallow open marine and sometime shoal facies, followed by Highstand Systems Tract (HST) represented by restricted marine facies. They are bounded below by a Transgressive surface (Ts) and above by marine flooding (mfs). They represent successive episodes of relative sea level rise and stillstands. The nature of these cycles (composition and symmetry) reflects the combined effect of local tectonics and eustasy.