Figure F22. Comparison of the gamma-ray and caliper logs between 200 and 400 mbsf, with the position of tephra layers marked, in Hole 1125B. Note that the tephra layers are not responsible for sudden changes in hole width, yet the shift to more sandy or shaly lithologies, recorded by the gamma-ray log, is responsible for some of the hole width changes (e.g., 250-275 mbsf).