Interpreted time sections of lines A-E. Blue areas show the Manazuru Knoll. Purple areas show the sedimentary layer on the Sagami Knoll. Orange, green, and black areas show the sedimentary layer of the Sagami Trough. Black broken lines indicate the reverse fault related to the Manazuru Knoll. Red arrows indicate the anticlinal axis of the Manazuru Knoll. Black arrows represent the east-dipping reflector in the Sagami Knoll. Green arrows show the erosional area in the Sagami Trough. MaK, Manazuru Knoll; SK, Sagami Knoll; MC, Miura Canyon; KC, Katase Canyon; ST, Sagami Trough.