Figure F1. A diagrammatic cross section of the Leg 171B drilling transect illustrating the relative position of drill sites. Total depth (TD) is shown for each drill hole sampled for strontium concentration and isotopic measurements. The transect trends ~247° updip along seismic line TD-5 between DSDP Site 390 and the ASP-3 borehole (Dillon and Popenoe; 1988, fig. 1). Note that Sites 1052 and 1053 along the transect were drilled in reverse order.