Cross-plot

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Illustration of a cross-plot used in petroleum geology for the interpretation of water saturation and clay content using well log data.

A cross-plot is a term used primarily in the Earth sciences to describe a specialized chart that compares multiple measurements made at a single time or location along two or more axes. The axes of the plot are commonly linear, but may also be logarithmic.

Cross-plots are used to interpret geophysical (e.g., amplitude versus offset analysis), geochemical, and hydrologic data.

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