O
| Olistostromes Oolites, deformed Ophiolites, obducted and subducted Orders of strike slip faults Orientation data Orientation diagram Orientation patterns Orientation, lattice preferred |
Orientation, shape preferred Orogenic settings, types of Orogens, orogeny, orogenic belts Orthogonal thickness versus limb dip Orthographic projections, de Paor Overprinting of structures Overthrusts Overturned fold Owen fracture zone |