A fence diagram is a subsurface geological model used to represent the spatial relationships between different geological units or attributes. It typically consists of a series of cross-sections (or fences) that intersect each other, providing a three-dimensional view of the subsurface. These diagrams are constructed by correlating data from boreholes, geophysical surveys, and surface geology to illustrate the lateral and vertical extent of strata, faults, and other subsurface features. For example, in environmental geology, a fence diagram can display the extent of a contaminant plume within various soil layers.
The construction of a subsurface model visualization offers several benefits. It facilitates a better understanding of complex geological structures, aids in resource exploration (e.g., oil, gas, minerals), and supports environmental remediation efforts. These visual aids have been used for decades, evolving from hand-drawn illustrations to sophisticated digital representations, enabling more accurate geological interpretations and predictions. They provide a crucial tool for communication among geologists, engineers, and stakeholders involved in projects impacting subsurface resources or conditions.
