1026-8774 1026-8774 S1026-87742021000300152 10.22201/cgeo.20072902e.2021.3.1641 Mexico 00 00 2021 00 00 2021 38 3 152 163

2019 2011 1977 XXXVIII 1 1 40-57 1973 7 4 4 287-332 1964 2003 2011 3 1-13 2004 2020 264 2019 2015 77 159-74 2002 2011 1998 15 2 2 115-31 2018 109 19-31 2005 27 5 5 855-8 2001 1953 217 1130 1130 295-305 1987 2000 R390 R390 1989 1981 1997 2017 1999 2016 31 154 154 166-92 1997 2019 259 2019 11 6 6 1-24 2020 2019 2171-8 1972 1977 6 29-34 1988 2000 1993 1988 100 8 8 1181-204 1987 2 2014 68 38-52 2011 CA, USA 1-4 2013 2013 Perth 683-95 1953 Mexico City, Mexico 218-37 2007 26 2 2 214-26 2008 43-9 2006 83 1-3 1-3 217-35 2015 74 1-23 2009 106 3-4 3-4 163-82 1983 2003 1965 52 1 1 193-201 1977 88 9 9 1231-6