Figure F25. Photograph of the lithologic boundary between forearc prism sediments (Subunit P1B), represented here as darker claystone (interval 205-1254A-15R-2, 128-145 cm) and the underthrust sediment (Subunit U1A), which is shown here as a lighter, more silt-rich claystone.

Figure F25. Photograph of the lithologic boundary between forearc prism sediments (Subunit P1B), represented here as darker claystone (interval 205-1254A-15R-2, 128-145 cm) and the underthrust sediment (Subunit U1A), which is shown here as a lighter, more silt-rich claystone.