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Earth, Planets and Space
Figure 6 | Earth, Planets and Space

Figure 6

From: Outer-rise normal fault development and influence on near-trench décollement propagation along the Japan Trench, off Tohoku

Figure 6

Small-scale faults within the sediment section. (A) A section of high-resolution line HD26B (yellow in Figure 1). (B) Interpretation of line HD26B with lithologies based on Site 436 of DSDP Leg 56, located further north on the Pacific Plate. Unit 1: vitric diatomaceous silty clay/clay stone, unit 2: radiolarian diatomaceous clay stone/pelagic clay, unit 3: chert (Shipboard Scientific Party 1980). Note the pelagic clay layer is approximately 1-m-thick in the drill core, above the chert layer and within unit 2. Faults within the mudstones have small offsets, less than 20 m, and do not cut the chert layer or offset the seafloor. (C) Interpretation of a section line HD27B, approximately 500 m north of HD26B, with lithologies based on Site 436 of DSDP Leg 56 (Shipboard Scientific Party 1980). This line also shows sediment-restricted faults.

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