Abstract: Lithostratigraphy studies on Hambast Formation deposits in Shorjestan section indicate that in this section, Hambast Formation with 23 m thickness has 2 units (6 and 7). The 6th unit includes 6.5 m marly limestone and red, green and gray shale layers and the 7th unit includes 16.5 m red to purple limestone besides red and gray shale. A comparison between under studied section with 4 other sections in Abadeh and Shahreza indicates that regarding probable reasons such as different procedures of tectonic activities in floor of sedimentary basin, differentiation in sedimentation rate and different depths in sedimentary basin, thickness and lithology of these deposits are different with each other in a way that in Esfeh section in Shahreza region, deposits of Shahreza informal formation have more thickness and different lithology in comparison with Abadeh and Shorjestan sections.