Figure F10. Conventions used during Leg 193 to measure the orientation of structures in cores. Most orientations were constructed from two apparent dips measured as lineations on the archive face and on one side of the archive half of the core (the side face), which was assumed to be at 90° to the archive face. For the purpose of plotting the data and also recording the data, the plane perpendicular to the core axis was regarded as the horizontal plane of a stereographic net with relative north being the bottom of the core liner of the archive half. The right side was chosen to be relative east, and the left side was chosen to be relative west.