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Deformation in the Zagros suture zone is a result of the oblique collision of the Afro-Arabian continent with the Central Iranian microcontinents. Various types of folding and faulting are characteristic features of the study area and indicate the performance of a high strain tectonic regime in this region. To distinguish deformation geometry during the collisional events, strain measurements have been carried out, using the Rf/?method on deformed radiolarian microfossils, in the Zagros su-ture zone. Based on the results, the strain ellipsoid shape is in the range of general flattening to plane strain (K=0.16–1.12). Measured mean kinematic vorticity number (Wm) in the deformed radiolarian rocks ranges between 0.50 and 0.87, which implies that exhumation of the Abade-Tashk area was facili-tated by a general shear flow (35％
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