Lineaments representing the faults, fractures, shear zones, etc., are the most obvious structural features interpretable on the satellite imagery (Figure 8.3). They control the occurrence and movement of groundwater in hard rock terrain and their significance in groundwater exploration has been proved beyond doubt. They occur in parallel sets in different directions indicating different tectonic events. They appear as linear to curvilinear lines on the satellite imagery and are often marked by the presence of moisture, alignment of vegetation, straight stream / river courses, alignment of tanks / ponds, etc. These lineaments can be further subdivided into faults, fractures and shear based on their image characters and geological evidences.