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Submitted on: 06 June 2016.
Revised on: 08 July 2016.
Accepted on: 30 August 2016.
___________________Geoscience Letters---SPRINGER
Submitted on: 25 December 2012.
Revised on: 23 March 2013.
Accepted on: 09 May 2013.
___________________Geoscience Letters---SPRINGER
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Submitted on: 12 October 2019.
Revised on: 08 February 2020.
Accepted on: 15 March 2020.
___________________Geoscience Letters---SPRINGER
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Submitted on: 21 November 2003.
Revised on: 16 March 2004.
Accepted on: 03 April 2004.
___________________Geoscience Letters---SPRINGER
Submitted on: 17 January 2011.
Revised on: 27 April 2011.
Accepted on: 27 May 2011.
___________________Geoscience Letters---SPRINGER
Submitted on: 29 August 2016.
Revised on: 15 December 2016.
Accepted on: 21 January 2017.
___________________Geoscience Letters---SPRINGER