INTRODUCTION: Tectonic geomorphology is defined as the study of reliefs produced by tectonic processes, or the application of geomorphic principles to the solution of tectonic problems (Keller, EA and Pinter N .1996). Geological structure plays a crucial role in determining a wide range of landforms, even in areas where exogenetic factors are considered dominant in the landscape (Ahnert 1998; Bloom 1998; Ritter et al. 2002). In recent years, digital elevation model (DEM) data and geographic information system (GIS) technologies have been widely used to determine the morphometric properties of tectonically active regions. Furthermore, the use of remote sensing and GIS techniques to assess surface tectonic formation is an emerging trend in recent research conducted in different parts of our country and the world. There is not a single record in the world, except satellite data and DEM, to assess surface tectonic formation. Thus, the digital elevation model data from the present study were used to evaluate the tectonic formation of different features (geomorphic units) in the Mula River basin. A good surface analysis research should provide the following information: formation of the basin area, formation of different geomorphic features, spatial distribution of geomorphic features. In the present paper, we used remote sensing and GIS tools to examine the formation of the river basin using DEM analysis. The morphotectonic study plays an important role in deciphering the effects of tectonic activity on the geomorphic evolution of watersheds. Morphotectonic analysis is the study of landforms produced by tectonic processes. In this study, remote sensing and GIS analysis t...... middle of article ......of the western Amazon basin: an approach using satellite images and a digital elevation model , Correspondence to: Clauzionor Lima da Silva, An Acad Bras Cienc 79Husam Abbas Ata (2008) A test of the validity of morphometric analysis in Determination of tectonic activity of aster-derived demos in the Jordan-Dead Sea Transform Zone , University of Arkansas Pp1-216Keller EA and Pinter N (1996) “Active tectonics: uplift and earthquake landscapes”; Prentice Hall, New Jersey. Ritter, D., F., Kochel, R., C., Miller, J., R., (2002) Process geomorphology – fourth edition. New York, The Mc-Graw-Hill Companyes, Wells, SG, Bullard, TF, Menges, TM, Drake, PG, Karas, PA, Kelson, KI, Ritter, JB and Westling, JR 1988. “Regional variation in geomorphology tectonics along the boundary of a segmented convergent plate, Pacific coast of Costa Rica. Geomorphology,1: 239–265.