JA Daily Science Report for Expedition 309, 15 August 2005


LOCATION: Site 1256


SCIENCE UPDATE: Cores 153R to 156R recovered 9.85 m of basalts from 1174.9 to 1194.2 mbsf (51% recovery) that were divided into three lithological units (53-55) because of systematic changes in grain size and/or occurrences of chilled margins. These units consist of aphyric microcrystalline to fine-grained basalts (Subunits 53A, 54A and Unit 55). In Pieces 20, 21, and 24 of Section 155R-1, the host basalts (Subunit 54A) are intruded by an aphyric cryptocrystalline basaltic dike (Subunit 54B).