JA Daily Science Report for Expedition 312, 28 November 2005


LOCATION: Site 1256


SCIENCE UPDATE: While the pipe trip to change the drill bit continued, the science party worked on their  figures and had a mass debate on the relative merits of the terms diabase and dolerite. In the truely international spirit of the Integrated Ocean Drilling Progamme, it was pointed out that that the American usage of the term diabase differs from the term s meaning in Japanese kanji, which follows the original European use of the term meaning an altered dolerite. The new bit entered Hole 1256D at 1418 hr and the drill string took weight at 1247 mbsf. The tight hole was washed and reamed from 1247 to 1343.5 mbsf, with vigorous pumping at a total rate of 130 strokes per minute. Rotary coring of Core 191R began from 1343.5 mbsf at 2045 hr.