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The depositional history of late Quaternary sediments around Mangalore, west coast of India

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Title The depositional history of late Quaternary sediments around Mangalore, west coast of India
 
Creator Manjunatha, B R
Balakrishna, K
 
Description 449-454
Netravati
and Gurpur are relatively large rivers drain the hinterland near Mangalore,
form a common estuary before they debouching into the Arabian
Sea. Lithologic successions observed in a number of bore holes and
dug wells indicate that Netravati and Gurpur rivers drained into the Arabian Sea independently during the last glacial period
when the sea level was about 100-138 m below the present level. In contrast to
Netravati, the lower course of Gurpur has migrated southerly in four stages for
a distance of 8 km and at present forms a common estuary with the Netravati
river. This is because of

drowning of the river channel
due to rapid rise in sea level during the early Holocene and growth of barrier
spit under the strong influence of southerly littoral currents during late
Holocene when the sea level was relatively stabile. The rate of infilling of
alluvial and marshy sediments during late Pleistocene to early Holocene
(0.5-5.0 mm/yr and 0.33-4.33 mm/yr respectively) is about two-three times
slower than that for barrier spit sands accumulation (0.14-1.14 mm/yr) during
the late Holocene.
 
Date 2014-01-15T10:06:50Z
2014-01-15T10:06:50Z
1999-12
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/25722
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.28(4) [December 1999]