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Ooids and peloids in the continental shelf off Kachchh, west coast of India - Inferences to palaeosealevel oscillations

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Title Ooids and peloids in the continental shelf off Kachchh, west coast of India - Inferences to palaeosealevel oscillations
 
Creator Vaz, G. Gaitan
Vijaykumar, P.
 
Description 190-196
Grey ooids (0.05 to 0.125 mm size) around 60 m depth, white ooids (0.125 to 0.0625 mm size) around 110 m depth and pale brown peloids (0.125 to 0.0625 mm size) around 90 m depth occur in the continental shelf off Kachchh. In cross sections, grey ooids with five and white ooids with three concentric growth rings are observed. In grey ooids an internal black growth ring with Fe and S as revealed by EMP studies suggest pyritization after regression. White ooids do not show any elemental variation. Peloids contain organic matter. The following inferences are drawn (1) grey ooids are considered older. than the white ooids though they occur at shallow depth or (2) few reversals of sea level took place around 60 m level during Holocene, which caused formation and pyritization of ooids.
 
Date 2016-10-19T10:36:03Z
2016-10-19T10:36:03Z
1998-06
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/35812
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.27(2) [June 1998]