Fractures in some of the flows are filled with pale brown, partially recrystallized limestone breccia. High-quality logs were acquired in igneous basement and in parts of the cored sedimentary interval. The Aptian-Albian limestones appear to be thinly and regularly bedded. Using the same logs, we can distinguish between pillows and massive flows within igneous basement. Basement Unit 1 consists entirely of pillow lava whereas Units 2-4 are massive flows with pillowed flow tops.
All olivine is altered and usually replaced by dark green clay.
Olivine phenocrysts are concentrated in the coarser patches and are rare to absent in the aphanitic parts. They are similar to the xenocrysts and xenoliths that we reported from Site 1183 and from the lower group of lava flows at Site 1185. Clinopyroxene and plagioclase are generally unaltered. On the whole, the alteration is similar to that in the lower group of basalt flows at Site 1185 and especially to that at Site 1183. The effects of the same three main low-temperature alteration processes are clearly seen.