Large E-W oriented, Neogene-Quatrnary structural depression, up to about 50 km long and 7.5 km wide, have developed between two mountainous chain(Mishow-Dagh on the south and Ghareh-Dagh on the north)on the northwest of Iran. The depression are now, deposited by Quaternary sediments as alluvial fans that lined along mountain fronts. Northern Misho fault is a E–W trending fault, that is elongated on northern slope of Misho-Dagh chain and bound the southern boundary of basin. Investigation of the role of tectonic activities on basin formation and rate of this activities by analysis of sedimentary-Geomorphologic datas are the main goals of this paper. For this, geophysic and geoelectric sections and geomorphologic effects investigated on the base of field studies and topographic and geologic map analysis. The paper collect the informations about Quaternary tectonic activities in study area. Results showed that in spite of success of marand plain and their adjacent mountains from high tectonic dynamics, present landscape of those mainly resulted from the last and espcially Quaternary tectonic activities. However, topographic and geomorphologic aspect of Marand plain severely affected from Quaternary tectonic activities and this factor plaied the main role in Marand extentional basin formation.
Keywords: Quaternary tectonic activities, Tectonically Marand basin, Quaternary sedimentary basins, Geomorphic assessment of faults, Northwest of Iran.
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