What is the definition of dip in geology?

Dip in geology refers to the angle at which a geological layer or stratum is inclined relative to a horizontal plane. This is a crucial concept as it helps geologists determine the orientation of rock layers, which can influence various geological processes and tectonic activities. The dip is typically measured in degrees from the horizontal surface, providing insight into the geological history and structural formation of the area being studied.

Understanding dip is essential for interpreting geological maps and assessing potential natural resource locations, as well as evaluating slope stability and planning construction projects. The other options, while relevant to geological concepts, do not accurately define what dip specifically refers to in the context of geologic mapping.