Map of India showing Cauvery Basin, b. Geological map of the Ariyalur Sub- basin showing the distribution of Cretaceous and Tertiary formations (modified after. Cauvery Basin: Geology. Cauvery basin forms a part of the South Indian Shield that preserves an early formed crust (> Ma). In terms of rock types. Biostratigraphy and Evolution of the Cauvery Basin, India. KING, W. and FOOTE, R. B., () On the geological structure of portions of the district of.
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Accompanying these are greenstones and quartzite. The Chhatisgarh and coastal plains, with a high incidence of rainfall, are predominantly rice growing areas.
The Cauvery basin extends over an area of 81, km 2which is nearly The depocentres were mainly due west. Prahalad Rao Memorial Lecture Dr. Total Drainage Area Km 2. The shape of the basin is somewhat rectangular with a maximum length and breadth of km and km, respectively.
These pf represented by gabbros, olivine noritesand pyroxene.
Krishnaraja sagar dam, BzsinMettur and Grand Anicut projects. Depressions in the Bay of Bengal affect the basin in the monsoon, causing cyclones and widespread heavy rains. Email the author Login required. Subscription Login to verify subscription Purchased Articles. The first marine transgression occurred during the close of Late Jurassic. Vaidyanadhan Award Endowment Lecture C.
Soil and Land use of Basin. Alluvial soils are found in the delta areas. Cauveru basin was well differentiated into depressions and ridges formed owing to taphrogenic fragmentation and block faulting along the dominant basement trends during the onset of Bason Jurassic.
Sedimentation during the Tertiary period was marked by repeated transgressions and regressions as is evidenced by biofacies, isopachs, and several sedimentation breaks which are relatively more pronounced in the western parts of the basin.
Cauvery Basin: Geology
Occasional flood problem in lower reaches and delta areas of Cauvery river. Outcrops ranging in age from Late Jurassic to Recent are located nearer the western margin of the basin.
Article Tools Print this article. Gupta Gold Medal L. Red soils occupy large areas in the bxsin.
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Soil of the Basin. The Charnockites are confined to the Nilgiri Range in the central part geoloy the drainage basin. The principal soil types found in the baasin are black soils, red soils, lateritesalluvial soils, forest soils, and mixed soils. Mahadevan Endowment Lecture R. The exposed and subsurface sedimentary sequence are adequately fossiliferous and several faunal as well as palynological zones are established. Karanth Endowment Lecture T. Several studies were made by the Central Pollution Control Board to ascertain the status of water quality in the Cauvery River.
Over the main basin, the peninsular granites and gneisses comprising of biotite granitic gneiss, hornblende granitic gneiss are widely found. The basin underwent an easterly tilt and the depocentres shifted due east prior to marine transgression during the beginning of Tertiary. Laterite soil is found in the lower parts of Orissa.
Physiographicallythe basin can be divided into three parts: Initial sedimentation was under non-marine environment.
Cauvery Basin: Geology
Major Tributaries with drainage area in sq. The eastern side of the basin gets most of the rain during the northeast monsoon.
The far north-western part of the drainage basin has a per-humid climate which passes eastwards into humid, moist sub-humid, dry sub-humid and semi-arid zones. Cauvery basin experiences tropical climate. The eastern parts of the basin are covered by alluvium and contain a relatively thicker and more complete sedimentary sequence.
Except in the Chhatisgarh and coastal plains, the basin has an extensive area under forests. The north-east monsoon provides the greater portion of the annual precipitation.
Gondwana System, Aligarh, India, Ann. Marine environment of sedimentation continued till Cretaceous, although through a series of minor transgressions and regressions. A major regression occurred during the close of Cretaceous. The results show that at many places, the quality of water was quite poor compared to what was the geoloty class. Bsin of Cauvery B asin. The Dharwar metamorphics mainly comprise geo,ogy phyllitesslates, schists with chlorite, biotitegarnet, and hornblende. Drainage Area Absin 2.
The delta area is the most fertile tract in the basin. Mixed red and black soils occur in parts of the BolangirSambalpurand Sundargarh districts of Orissa. The important tributaries joining Cauvery in the Coorg district are the Kakkabethe Kadanur and the Kummahole. The geology of the drainage basin is predominantly formed from Precambrian rocks, principally the DharwarsPeninsular granitic Gneiss, Charnockites and the Closepet Granite.
Forest and agriculture are the main stay of the people in the interior parts of the basin. Statewise Drainage Area Km 2. Email this article Login required.