TO: Tom Davies

FM: Jay Miller


JA Daily Science Report for Expedition 305, 19 February 2005.


SCIENCE UPDATE: Cores 305-U1309D-269R to -274R (1292.7 to 1321.5 mbsf, 73% recovery) are medium- to coarse-grained gabbro, oxide gabbro, and olivine gabbro. Alteration ranges from 5 to 20%, with green amphibole after pyroxene, chlorite after plagioclase, and serpentine after olivine. Several thin (few tens of cm) intervals show evidence of shear.