Thursday, January 22, 2015

Seismic Reflection Characters

Parallel reflections suggest uniform deposition on a stable or uniformly subsiding surface, whereas divergent reflections indicate variation in the rate of deposition from one area to another or else gradual tilting. Chaotic reflections suggest either relatively high depositional energy, variability of conditions during deposition, or disruption after deposition, such as can be produced by slumping or sliding or turbidity-current flow.

A reflection-free interval suggests uniform lithology such as a relatively homogenous marine shale, salt , or massive carbonates ; however, distinguishing reflection-free patterns from multiples and noise that obsecures reflections may be difficult.

(Sherrif. 1995. Exploration Seismology)

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