0120-0283 0120-0283 S0120-02832017000300071 10.18273/revbol.v39n3-2017005 Colombia Colombia 00 12 2017 00 12 2017 39 3 71 86

2007 272 303-19 2015 Melbourne, Australia 10p 2014 33p 2012 331-332 331-332 97-111 2014 19p 1984 162 421p 2016 34p 2015 33 35-60 INGEOMINAS 2009 31p 2004 17 1 1 49-58 2011 256p 1994 32 6 6 884-94 2014 89p 2015 114p 2006 36p 2000 1986 145p 2007 176 p 2006 36p 2005 20p 2008 33 79-90 2005 18p 2001 26 5-27 USGS 2016 2002