Geological structures are three dimensional, yet are typically represented by, and interpreted
from, outcrop maps and structure contour maps, both of which are curved
two-dimensional surfaces. Maps plus serial sections, called 2½-D, provide a closer
approach to three dimensionality. Computer technology now makes it possible for
geological interpretations to be developed from the beginning in a fully three dimensional
environment. Fully 3-D geological models allow significantly better interpretations
and interpretations that are much easier to share with other geologists and with
the general public. This book provides an overview of techniques for constructing
structural interpretations in 2-D, 2½-D and 3-D environments; for interpolating between
and extrapolating beyond the control points; and for validating the final interpretation.
The underlying philosophy is that structures are three-dimensional solid
bodies and that data from throughout the structure, whether in 2-D or 3-D format,
should be integrated into an internally consistent 3-D interpretation.
