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Age of Saurashtra miliolites by U-Th decay series methods: possible implications to their origin
N Hussain N Bhandari K R Ramanathan B L K Somayajulu
Volume 89 Issue 1 March 1980 pp 23-29
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https://www.ias.ac.in/article/fulltext/jess/089/01/0023-0029 -
Keywords
Miliolites ;Saurashtra coast ;U ages ;carbon dating -
Abstract
The miliolite deposits of Saurashtra have been dated by234U,230Th,231Pa and14C methods. Concordant ages of 105 years using the U decay series isotopes are obtained which agree with the ages of the coral reefs of Okha-Dwaraka coast suggesting a contemporaneous origin for both. The lower14C ages (≤40,000 years) may be due to a recent influx of seawater or ground water. Quartz and clay minerals together constitute only ≤10% by weight, as such the aeolian characteristics of quartz grains may not be relevant to the origin of the miliolites.
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Author Affiliations
N Hussain1 N Bhandari1 K R Ramanathan1 B L K Somayajulu1
- Physical Research Laboratory, Ahmedabad - 380 009
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Dates
- Published
- March 1980
- Manuscript received
- 25 June 1979
- Manuscript revised
- 25 January 1980
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