Geography of MizoramMizoram is a land of rolling hills, valleys, rivers, and lakes in Northeast India. As many as 21 major hill ranges or peaks of different heights run through the length and breadth of the state, with plains scattered here and there. The average height of the hills to the west of the state is about 1,000 metres (3,300 feet). These gradually rise to 1,300 metres (4,300 feet) to the east. Some areas, however, have higher ranges which go up to a height of over 2,000 metres (6,600 feet). Landscape of MizoramThe folded structure of the Mizoram ranges is at the junction of two moving tectonic plates(Indian and Burmese Desi Kachar 1974). On 19 April 2011, there was a 4.3 earthquake about 10 km North of Kolasib, and a 6.4 was recorded on 4 February 2011. Mizoram is in the highest zone 5 for earthquakes.[1] The folded hilly or mountainous North South belts, with perpendicular faults, comprise sediments of the Surma (Middle Bhuban Formation), Barail, and Tipam groups. There is Alluvium in river beds consisting of deposits of argillaceous and arenaceous sandstones, shale, siltstones and mudstones, and greywacke. A 560m thick rock succession of the Middle Bhuban type exposed between Bawngkawn and Durtlang shows 7 normal and 7 reverse magneto strata (North and South pole reversals) showing its age to be around 20 Million years old.[2] The rock system is generally weak, unstable, weathered, and prone to seismic and weather influence-producing landslides. The soft, black-to-grey rock is used locally for building materials and low-traffic road construction work. There are no useful minerals of economic significance apart from clays in the River Tlawng beds together with deposits of sand and gravel. Typical soils are sandy loam, and clay loam that have been heavily leached due to the high slopes leaving it porous and lacking in minerals or humus. Several oil and gas exploration activities have taken place due to the geological condition with which Mizoram has been formed, leading to the possibilities and high expectations that reserves would be confirmed. France, Russia, and Cyprus as well as several Indian companies have already signed a 12% oil and 10% gas royalty arrangement with proceeds going directly to Mizoram state on any production (April 2009) Mountain Range
Rivers
Lakes
Waterfalls
See alsoReferences
|
Portal di Ensiklopedia Dunia