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Table T6. Logging units defined by LWD data. (See table note.)

Logging Depth
(m LSF)
Description Lithologic interpretation
Unit Subunit
I   0–197.8 Gamma ray increasing trend, high-frequency and high-amplitude fluctuation of gamma ray values. Gradual increasing trend of resistivity. Strong fluctuation of resistivity. Sandy and muddy sediments
II   197.8–428.3 Gradual increasing trend of gamma ray baseline. Occasional thick (5 m) low gamma ray layers. Constant resistivity baseline with frequent thick conductive zones. Mudstone with thick sand
III A 428.3–545.3 High gamma ray baseline with thin (1 m) low gamma ray layers. Less variable and slight decreasing trend of resistivity. Alternating beds of mudstone and sand (mud dominant)
B 545.3–711.5 High gamma ray baseline with large number of thin (1 m) low gamma ray layers. General decreasing and variable (repeated increasing) trend of resistivity. Alternating beds of mudstone and sand (sand dominant)
IV   711.5–TD Low gamma ray and low resistivity. Sand

Note: LSF = LWD depth below seafloor. TD = total depth.

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