Figure 32. Lithologic log of basement units at Site 1186 showing the distribution of plagioclase rich xenoliths, glassy pillow rims, and vesicles. Dashed line = unit boundary. The location of the Unit 3/Unit 4 boundary is uncertain because of poor recovery. However, formation microscanner logging tool images suggest that the top of Unit 4 consists of ~9 m of pillow basalt.