Seismic reflection records collected east and south of the Bermuda Pedestal by USNS “Kane” and USNS “Wilkes” show that the acoustic basement morphology throughout most of the area is typical of rugged ocean crust; only around the base of the pedestal and within a lobe to the southeast does basement appear noticeably smoother. Structural trends, revealed by bathymetric and isopach maps, tend to parallel the mid-ocean ridge. The sediments above basement vary in thickness up to 1.5 sec. A belt of thick sediment (1.0 sec or greater) around the base of the pedestal indicates a structural moat and also reflects the input of erosional debris from the pedestal in addition to the normal pelagic sedimentation. Locally, the sediments around Bermuda are separated into upper and lower sections by a zone of acoustically laminated sediments. The zone correlates with a sequence of upper Eocene to upper Oligocene volcanoclastic turbidites recovered at DSDP site 386 and is interpreted as an early archipelagic apron and plain which has since been deformed by basement movements and differential compaction. Older reflective horizons also occur locally to the south-southeast of Bermuda and may correlate with lower Eocene siliceous and carbonate turbidites at site 386. The distribution pattern of these sediments suggests a source (or sources) other than Bermuda, possibly the continental margin of North America. A second major erosional and depositional phase, apparently resulting from the Pleistocene sea-level fluctuations, is represented by ponded, reflective sediments which form the sea floor at the base of the pedestal. Depositional asymmetry indicative of bottom-current activity is evident throughout the survey area; a vigorous abyssal circulation appears to have been active since before the upper Eocene. No evidence was found indicating the existence of a major seamount structure predating the present Bermuda Pedestal, although a small, incipient “bulge” is not excluded.