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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The shape of the basin is somewhat rectangular with a maximum length and breadth of km and km, respectively. The Dharwar metamorphics mainly comprise of phyllitesslates, schists with chlorite, biotitegarnet, and hornblende.

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Initial sedimentation was under non-marine cauveyr. A major regression occurred during the close of Cretaceous. The tributaries joining it from the right are the Lakshmanathirthathe Kabbaniand the Survanavathi.

Several studies were made by the Central Pollution Control Board to ascertain the status of water quality in the Cauvery River.

Prahalad Rao Memorial Lecture Dr. Statewise Drainage Area Km 2. Soil of the Basin.


Cauvery Basin: Geology

Alluvial soils are found in the delta areas. Physiographicallythe basin can be divided into three parts: Abstract Outcrops ranging in age from Late Jurassic to Recent are located nearer the western margin of the basin. Email the author Login required.

The basin underwent an easterly tilt and the depocentres shifted due east prior to marine transgression during the beginning of Cauveru. The delta area is the most fertile caugery in the basin. Further down, the river enters Tamil Nadu state where the many tributaries, namely, the Bhavani basjn, the Noyiland the Amravathi join it. The geology of the drainage basin is predominantly formed from Precambrian rocks, principally the DharwarsPeninsular granitic Gneiss, Charnockites and the Closepet Granite.

The eastern parts of the basin are covered by alluvium and contain a relatively thicker and more complete sedimentary sequence. The deltaic soil is found in the coastal plains of the Mahanadi. The highest rainfall in the geoloty is received along the western border of the basin during the southwest monsoon. The Charnockites are confined to the Nilgiri Range in the central part of the drainage basin.

Here, the main climatic feature is the monsoon rain. The Closepet Granite of the upper reaches of the Cauvery basin is a pink granite consisting mainly of quartz, plagioclase, microcline, perthiteand subordinate hornblende. The first marine transgression occurred during the close of Late Jurassic.


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

Vaidyanadhan Award Endowment Lecture C. The differentiation of the basin feology depressions and ridges was almost lost during Eocene. The main soil types found in the basin are red and yellow soils. Suryaprakash Rao Endowment Lecture K. Total Drainage Area Km 2.

Depressions in the Bay of Bengal affect the basin in the monsoon, causing cyclones and widespread heavy rains. Krishnaraja sagar dam, NuguMettur and Grand Anicut projects.

Occasional flood problem in lower reaches and delta areas of Cauvery river.

These are represented by gabbros, olivine noritesand pyroxene. The exposed and subsurface sedimentary sequence are adequately fossiliferous and several faunal as well as palynological zones are established.

Cauvery Basin: Geology

The important tributaries joining Cauvery in the Coorg district are the Kakkabethe Kadanur and the Kummahole. Accompanying these are greenstones and quartzite. Gupta Gold Medal L.