leg site hole core section top of sample interval (m) bottom of sample interval (m) fraction mineral percent 16 157 A 1 0.00 7.54 BULK 'diffuse scattering' measure 68.3 16 157 A 1 0.00 7.54 BULK 'amorphous material' measure 50.4 16 157 A 1 0.00 7.54 BULK CALCITE 96.0 16 157 A 1 0.00 7.54 BULK QUARTZ 1.2 16 157 A 1 0.00 7.54 BULK PLAGIOCLASE 1.4 16 157 A 2 9.00 10.48 BULK 'diffuse scattering' measure 66.6 16 157 A 2 9.00 10.48 BULK 'amorphous material' measure 47.9 16 157 A 2 9.00 10.48 BULK CALCITE 99.4 16 157 A 3 18.00 24.04 BULK 'diffuse scattering' measure 69.3 16 157 A 3 18.00 24.04 BULK 'amorphous material' measure 52.0 16 157 A 3 18.00 24.04 BULK CALCITE 99.1