The sheeted dike complex is a regionally mappable geologic unit with consistent position in the Samail ophiolite stratigraphy. Discontinuous exposures of the complex in the Ibra area of the southeast Oman Mountains provide structural data that allow reconstruction of a paleo-spreading ridge axis of 347 ¿ for the region and suggest a maximum spreading width of 275 km for the ophiolite. Contact relations within the well-exposed Al Ahamdi section indicate that the complex was formed by multiple parallel intrusion over a narrow zone at the paleo-ridge axis. Split dikes are abundant; facing directions indicate a spreading ridge southwest of the present outcrop area, in conflict with other spreading axis direction indicators.