leg site hole core section top of sample interval (cm) bottom of sample interval (cm) subbottom depth(m) fraction mineral percent 69 504 A 3 1 <2 MICRONS 'amorphous material' measure 10.0 69 504 A 3 1 <2 MICRONS "variety of MONTMORILLONITE" 5.0 69 504 A 3 1 <2 MICRONS QUARTZ 3.0 69 504 A 3 1 <2 MICRONS FELDSPAR (undifferentiated) 5.0 69 504 A 4 1 <2 MICRONS 'amorphous material' measure 20.0 69 504 A 4 1 <2 MICRONS "variety of MONTMORILLONITE" 50.0 69 504 A 4 1 <2 MICRONS QUARTZ 3.0 69 504 A 5 1 <2 MICRONS 'amorphous material' measure 10.0 69 504 A 5 1 <2 MICRONS QUARTZ 3.0 69 504 A 5 1 <2 MICRONS APATITE 5.0