leg site hole core section top of sample interval (cm) bottom of sample interval (cm) subbottom depth(m) fraction mineral percent 66 489 1 4 028 030 4.78 <2 MICRONS "variety of MONTMORILLONITE" 60.0 66 489 1 4 028 030 4.78 <2 MICRONS ILLITE 15.0 66 489 1 4 028 030 4.78 <2 MICRONS CHLORITE 25.0 66 489 2 3 050 052 9.50 <2 MICRONS "variety of MONTMORILLONITE" 49.0 66 489 2 3 050 052 9.50 <2 MICRONS ILLITE 36.0 66 489 2 3 050 052 9.50 <2 MICRONS CHLORITE 9.0