Fig. 4

Construction of geologic cross sections, an example from Tuscarora. Lithology and fault interpretations from cuttings and core, along with the locations of partial and complete lost circulation zones (red diamonds) are plotted along well paths. Wells within 500 m of the cross-sectional plane are projected to the section, so all the wells shown are not exactly in the cross-sectional plane. A strip of the geologic map along the cross-sectional line (top) indicates the surface locations of mapped faults and geologic contacts. The cross section is constructed based on the map data and other available subsurface data, such as seismic reflection and potential field data (not shown)