TO: Tom Davies

FM: Carlos A. Alvarez Zarikian

JA Daily Science Report for Expedition 306, 2 April 2005.

LOCATION: Site U1313 (IRD3A)

SCIENCE UPDATE:

Coring Hole U1313D concluded at 1145 hr with the recovery of Core 16H for a total of 159.27 m of sediment (104.8%). At Hole U1313C, the lithology is very similar to that of Holes U1313A and B: Brownish (10YR 8/3, 10YR 7/3, 2.5Y 7/4) sediments at the top of Core 1H transitioning into dominantly medium light gray (N6), with light olive gray (5Y 6/2), light gray (5Y 7/1), olive yellow (5Y 6/6), and greenish (5Y 6/3) mm-cm thick laminae downhole to Core 14H, and predominantly white (N9) nannofossil ooze thereafter. The Brunhes/Matuyama boundary was identified at 34.1 mbsf (0.78 Ma) and the Jaramillo normal polarity zone between 42 and 47 mbsf (0.99-1.07 Ma) in Hole U1313C.