Geology and Topography
Except around Mumbai, and along the eastern limits, the State of Maharashtra presents a monotonously uniform, flat-topped skyline. This topography of the state is the outcome of its geological structure. The state area, barring the extreme eastern Vidarbha region, parts of Kolhapur and Sindhudurg, is practically co-terminous with the Deccan Traps. Roughly 60 to 90 million years ago, the outpouring of basic lava through fissures formed horizontally bedded basalt over large areas. Variations in their composition and structure have resulted in massive, well-jointed steel-grey cliff faces alternating with structural benches of vesicular amygdaloid lava and ash layers, all of which contribute to the pyramida-shaped hills and crest-level plateaux or mesas. Earth sculpturing under the tropical climate completed the panorama-sharply defining the landform features in the semi-arid conditions, and rounding the hilltops under wetter condition. Fluvial action by the Krishna, Bhima, Godavari, Tapi-Purna and Wardha-Wainganga river systems has further aided in the compartmentalisation of the Desh into broad, open river valleys, alternating with plateau interfluves, that form the ribs of the Sahyadrian backbone. In sharp contrast, the hill torrents of the Konkan, barely a 100 km long, tumble down as roaring streams which flow in deeply entrenched valleys to terminate in tidal estuaries.
Read more about this topic: Geography Of Maharashtra
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