Figure F2. Generalized cross section along the Muroto Transect along the line shown on Figure F1. OOST = out-of-sequence thrust, PTZ = protothrust zone, BSR = bottom-simulating reflector, VE = vertical exaggeration. Major observations pertinent to décollement evolution are shown. After initiation of the décollement as outlined in Figure F5, the underthrusting of the lower Shikoku Basin sediment creates a porosity inversion as observed at Sites 1174 and 808 and a strong negative polarity reflection. Amplitude loss with continued underthrusting apparently reflects consolidation of the sediments below the décollement (Bangs et al., 2004).

Figure F2. Generalized cross section along the Muroto Transect along the line shown on Figure F1. OOST = out-of-sequence thrust, PTZ = protothrust zone, BSR = bottom-simulating reflector, VE = vertical exaggeration. Major observations pertinent to décollement evolution are shown. After initiation of the décollement as outlined in Figure F5, the underthrusting of the lower Shikoku Basin sediment creates a porosity inversion as observed at Sites 1174 and 808 and a strong negative polarity reflection. Amplitude loss with continued underthrusting apparently reflects consolidation of the sediments below the décollement (Bangs et al., 2004).