RULES OF‘VS Traces of dipping layers that intersect uneven ground or topography Left hand side: Map view of layer in stream valle Right hand side: Cross section view of dipping layer. (after Marshak and Mitra laboratory manualRULES OF ‘VS’ Traces of dipping layers that intersect uneven ground or ‘topography’. Left hand side: Map view of layer in stream valley. Right hand side: Cross section view of dipping layer. (after Marshak and Mitra laboratory manual.) 11