Pressure Ridges about Baghlar Basin An Indication of Neotectonic Activities of North Mishow Fault

Tectono-geomorphologic features such as pressure ridges along strike-slip faults provide a reliable way to determine the fault displacement. The E-W trending active and strike-slip northern Mishow Fault is continuation of great Tabriz fault, that its activity has created numerous geomorphologic traces. We document pressure ridges about Baghlar basin as a geomorphic effect of northern Mishow fault, based on tectono-geomorphic interpretation of field geologic and geomorphic observations. our results show that Pressure ridges of study area by the names of Sisdah and Tapah-Bashy, are developed along northern Mishow fault, which resulted from long-term tectono-geomorphic growth in Quaternary, specially. Present pressure ridges development indicate neotectonic movements in the study area. Occurrence of three phenomena of river diversion, river capture and continous go back of elbow of capture in a small segment of Baghlar basin, are the most important effects of high dynamics and durability of slope instabilities in pressure ridges. This case study, thus, provides a good example for understanding the long-term tectono-geomorphological evolution of a major intracontinental strike-slip fault.