Figure 2. Predicted (A) and actual (B) drilling results from Leg 149 (after Sawyer et al., 1993) with special emphasis on basement rock type (vertical exaggeration 5). From west to east, this transect sampled in Sites 897 and 899 peridotitic basement, and lower crust in Site 900 (metamorphosed, mafic igneous rocks); Site 901 cored Tithonian sediments interpreted as prerift, so that basement here is very likely upper continental crust. Sites IAP-3C, IAP-6C, and IAP-7 are proposed drill locations.