JA Daily Science Report for Expedition 309, 14 August 2005


LOCATION: Site 1256


SCIENCE UPDATE: Cores 149R to 152R recovered 3.51 m of basalts from 1156.1 to 1174.9 mbsf (18.7% recovery). Aphyric microcrystalline to fine-grained basalts are intruded by aphyric cryptocrystalline to glassy, black basalts. Vertical chilled margins, up to 5 mm-thick, occur in numerous pieces in Sections 149R-1, Section 150R-1, and Section 151R-1. These complex contact zones are commonly brecciated and mineralized with quartz, anhydrite, epidote, and pyrite.