leg site hole core section top of sample interval (cm) bottom of sample interval (cm) subbottom depth(m) fraction mineral percent 55 431 A 1 1 128 130 <2 MICRONS "variety of MONTMORILLONITE" 57.0 55 431 A 1 1 128 130 <2 MICRONS ILLITE 35.0 55 431 A 1 1 128 130 <2 MICRONS KAOLINITE 8.0 55 431 A 2 2 014 016 <2 MICRONS "variety of MONTMORILLONITE" 100.