residual map

A stratigraphic map that displays the small-scale variations (such as local features in the sedimentary environment) of a given stratigraphic unit.

Related terms:

• facies map
• stratigraphic map
• isofacies map
• rate-of-change map
• ratio map
• isopach map
• lithofacies map
• structural contour map
• paleolithologic map
• gravity map