Spectral Mapping of Siwalik Sediments of a Part of Jammu Foothills

The satellite and ground based spectral data corresponding to the six reflected radiance bands of Landsat Thematic Mapper (TM) are analysed to determine their utility in mapping the possible lithologic variations wihtin the Siwalik sediments of J&K foothills. The satellite reflectance values plotted along a selected image profile identified subunits within the Lower Siwalik, Pammdal and Nagrota, which were not identified by conventional field mapping. The field reflectance studies also confirmed their presence. The variation may reflect a possible lithofacies change wihtin the units. The technique developed may provide a rapid reconnaissance tool for preparing lithofacies map.