GEOL 352 Lecture Notes - Lecture 3: Pseudotachylite, Eclogite, Hornblende

• School: College of Charleston
• Department: Geology and Environmental Geosciences
• Course: GEOL 352
• Professor: Beutel

Document Summary

When a bed crosses a valley, the outcrop pattern of the bed will "v" or curve in the direction that the bed is dipping in map view. Conversely, when a sedimentary bed crosses a ridge, it will "v" in the direction opposite to its dip. A vertical bed will never "v" - it will just go straight across the topography. A horizontal bed will parallel topographic contours on a map. A bed whose dip angle is less than the slope of the valley bottom (creek) may v. Apparent dip in direction opposite to its dip. For a dipping bed, viewing it from any direction not perpendicular to the strike will make the bed appear to be dipping more shallowly than it is. Thus it will have an apparent dip that is always less than the true dip (steepest path down the slope).