1. adj. 
Pertaining to structure, the geometry and spatial arrangement of rocks. The structure or deformation can include many mechanisms, such as folding, faulting and fracturing. Structure can usually be interpreted in terms of the deformation of the crust of the Earth as continents and tectonic plates move and collide.
See: anticlinal trap, anticline, closure, crest, crust, diapir, differential compaction, drape, en echelon, fault, fold, fracture, geologic map, harmonic, inversion, orogeny, plate tectonics, prospect, spill point, stratigraphy, structural trap, structure, structure map, syncline, trap