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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These are represented by gabbros, olivine noritesand pyroxene. Except in the Chhatisgarh and coastal plains, the basin has an extensive area under forests. The 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 Late Jurassic. Further down, the river enters Tamil Nadu state where the many tributaries, namely, the Bhavanithe Noyiland the Amravathi join it.

Forest and agriculture are the main stay of the people in the interior parts of the basin. The highest rainfall in the basin is received along the western border of the basin during the southwest monsoon. Naqvi Gold Medal K. The first marine transgression occurred during the close of Late Jurassic.

Biostratigraphy and Evolution of the Cauvery Basin, India | Sastri | Geological Society of India

The shape of the basin is somewhat rectangular with a maximum length and breadth of km and km, respectively. Krishnaraja sagar dam, NuguMettur and Grand Anicut projects.

Suryaprakash Cauveery Endowment Lecture K. Over the main basin, the peninsular granites and gneisses comprising of biotite granitic gneiss, hornblende granitic gneiss are widely found.


Soil and Land use of Basin. The tributaries joining it from the right are the Lakshmanathirthathe Kabbaniand the Survanavathi.

The north-east monsoon provides the greater portion of the annual precipitation. Initial sedimentation was under non-marine environment. Email the author Login required.

Cauvery Basin: Geology

Here, the main climatic feature is the monsoon rain. Geology geopogy the Basin. Total Drainage Area Km 2. Laterite soil is found in the lower parts of Orissa. Future Challenges in Earth Gupta Gold Medal L.

The differentiation of the basin into depressions and ridges was almost lost during Eocene. Physiographicallythe basin can be divided into three goelogy The eastern parts of the basin are covered by alluvium and contain a relatively thicker and more complete sedimentary sequence. Water Potential of the Basin. Marine environment of sedimentation continued till Cretaceous, although through a series of minor transgressions and regressions. Cretaceous sediments crop out in the coastal region and consist of conglomeratic sandstone, coralline limestone, and shale.

Several studies were made by the Central Pollution Control Board to ascertain the status of water quality in the Cauvery River. The total length of the bbasin from source to its outfall into Bay of Bengal is about km.

The geology of the drainage basin is predominantly formed from Precambrian rocks, principally the DharwarsPeninsular granitic Gneiss, Charnockites and the Closepet Granite. Cauvery basin experiences tropical climate. The depocentres were mainly due west. Gondwana System, Aligarh, India, Ann. Wadia Endowment Lecture G.

Outcrops ranging in age from Late Jurassic to Recent are located nearer the western margin of the basin.

The deltaic soil is found in the coastal plains of the Mahanadi. Vaidyanadhan Geolofy Endowment Lecture C. 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 desired class. 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.


Black soil and sandy soil with ” Kankar ” are the main soils found in the part of basin lying in Chhattisgarh. Drainage Area Km 2. Cauvery then enters the Mysore district where important tributaries joining the river from the left are the Harangithe Hemavathithe Shimsha and the Arkavathi. Subscription Login to verify subscription Purchased Articles. Alluvial soils are found in the delta areas. The main soil types found in the basin are red and yellow soils. The important tributaries joining Cauvery in the Coorg district are the Kakkabethe Kadanur and the Kummahole.

Article Tools Print this article. Muthuswami Memorial Lecture C. The Cauvery basin extends over an area of 81, km 2which is nearly Accompanying these are greenstones and quartzite. Sawkar endowment for Teachers training V.

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The eastern side of the basin gets most of the rain during the northeast monsoon. Heology of the Basin. It is bounded on the west by the Western Ghatson the east and south by the Eastern Ghats and on the north by the ridges separating it from the Tungabhadra Krishna and Pennar basins.