Submitted on: 23 June 2016.
Revised on: 02 September 2016.
Accepted on: 05 October 2016.
___________________Boletin de Geologia---UNIV INDUSTRIAL SANTANDER
Submitted on: 14 May 2017.
Revised on: 09 August 2017.
Accepted on: 02 October 2017.
___________________Boletin de Geologia---UNIV INDUSTRIAL SANTANDER
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Submitted on: 23 July 2000.
Revised on: 31 October 2000.
Accepted on: 25 November 2000.
___________________Boletin de Geologia---UNIV INDUSTRIAL SANTANDER
Submitted on: 10 April 2007.
Revised on: 23 May 2007.
Accepted on: 13 June 2007.
___________________Boletin de Geologia---UNIV INDUSTRIAL SANTANDER
Submitted on: 29 January 2007.
Revised on: 02 March 2007.
Accepted on: 28 April 2007.
___________________Boletin de Geologia---UNIV INDUSTRIAL SANTANDER
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