TO: Tom Davies

FM: Jay Miller

JA Daily Science Report for Expedition 305, 28 January 2005.

SCIENCE UPDATE: Cores 305-U1309D-155R to -160R (757.8 to 784.6 mbsf, 88% recovery) continue in diabase to microgabbro, to a sharp contact with medium-coarse grained olivine gabbro. Coarse-grained gabbro interfingers at the meter scale with medium-coarse grained olivine-bearing gabbro to the bottom of the cored interval with rare thin (few cm) seams of oxide gabbro. Alteration is low in general to moderate near veins and fractures, and evidence of strong deformation is rare.