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two-dimensional survey

1. n. [Geophysics]

Seismic data or a group of seismic lines acquired individually such that there typically are significant gaps (commonly 1 km or more) between adjacent lines. A 2D survey typically contains numerous lines acquired orthogonally to the strike of geological structures (such as faults and folds) with a minimum of lines acquired parallel to geological structures to allow line-to-line tying of the seismic data and interpretation and mapping of structures.

See: acquisitioncorrelatecorrelationfaultfoldstrike

Diagram of a two-dimensional seismic survey.

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