TO: Tom Davies
FM: Jay Miller
JA Daily Science Report for Expedition 305, 5 February 2005.
SCIENCE UPDATE: Cores 305-U1309D-185R to -188R (899.8 to 919.0 mbsf, 81% recovery) are medium- to coarse-grained, oxide-bearing gabbro and gabbro, grading down section to coarse-grained, olivine-bearing and olivine gabbro. Modal changes are commonly subtle, but some grain size changes are sharp, planar, and steeply dipping in the core reference frame. Alteration is low, and evidence of strain, while low throughout, seems more pronounced in finer grained intervals.