Convergence of the Indian plate towards Eurasia is reflected in neotectonics along several zones throughout the Indian plate. Neotectonics of the upper Narmada river basin following one of the active Son-Narmada Fault (SNF central part) zones in central Peninsular India has been studied through tectonic geomorphometric parameters. The study area is 175？km wide and 400？km long valley and catchment area of upper Narmada river basin in Madhya Pradesh state. High resolution ASTER data indicates neotectonic features like sudden changes in drop of Narmada river floor at two locations around Jabalpur formed by conjugate normal faults. Cross profiles indicate uplift of the entire area by a few hundred meters south of the Son-Narmada south fault. Basin asymmetry parameter indicates northward shifting of the river course from middle of the basin due to uplift of the southern block. 1. Introduction Cratonic part of central India has witnessed reactivation during Precambrian. Later during Cretaceous, a 1600？km long and 200？km wide ENE-WSW trending rift zone developed in central Indian peninsula [1]. Three pericontinental rift basins were formed in the western margin of the Indian shield. The Son-Narmada rift developed in parallel to the Satpura trend during late Cretaceous, while the Cambay graben formed in colinearity with the Dharwar trend during early Cretaceous [2]. The Son-Narmada fault (SNF) zone has a Precambrian ancestry which separates Vindhyan basin to its north and the Gondwana belt southwards [3]. In both northern and southern regions of the Son-Narmada lineament, vertical block movements have been reported [3, 4]. Due to these movements, the Bijawar group of rocks within the SNF zone got uplifted during the time of sedimentation in Vindhyan Supergroup [5]. Presence of series of ENE-WSW trending subsurface structures within the sediments of Cambay basin suggests extension of Satpura trend across the basin. The NE-SW Aravalli-Delhi trend is well reflected in northern part of Cambay basin [2, 6]. Faults and lineaments are mainly aligned parallel/subparallel to the major tectonic grains. Along the marginal faults of Cambay basin, the Deccan Traps have been downfaulted (3000–5000？m); throw being more in eastern marginal fault has resulted in asymmetric graben structure [7–10]. The Son-Narmada fault/lineament and Tapi north Fault have ENE-WSW trend and control the course of main drainage system [11]. The Son-Narmada-Tapi (SONATA) zone extends WNW up to the shore of the Arabian Sea. Represented by a fault pair, SONATA defines Narmada rift valley and Satpura
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