. Smithsonian miscellaneous collections . nd tointerpret the physical parameters and processes causing this move-ment. As Sable Island offers an opportunity to conduct a controlledstudy of the interaction of wind and water on an isolated sand body,criteria valuable in distinguishing adjacent depositional environments,particularly beaches and dunes, are investigated. This study wasinitiated as part of a more extensive investigation of the sediment dis-persal patterns on Sable Island Bank and adjacent areas, the results ofwhich are presented elsewhere (Stanley et al., 1967; James and Stan-ley, i
. Smithsonian miscellaneous collections . nd tointerpret the physical parameters and processes causing this move-ment. As Sable Island offers an opportunity to conduct a controlledstudy of the interaction of wind and water on an isolated sand body,criteria valuable in distinguishing adjacent depositional environments,particularly beaches and dunes, are investigated. This study wasinitiated as part of a more extensive investigation of the sediment dis-persal patterns on Sable Island Bank and adjacent areas, the results ofwhich are presented elsewhere (Stanley et al., 1967; James and Stan-ley, in press). NO. 7 SEDIMENT TRANSPORT, SABLE ISLAND JAMES & STANLEY 3 DESCRIPTION OF SABLE ISLAND Sable Island is an arcuate bar of sand approximately 24 miles long,% mile wide at its widest point, and only a few hundred yards wideat its terminal extensions (fig. 2). It lies at about 60° West Longitudeand 44° North Latitude. The central core of the island is composedof sand dunes stretching discontinuously 17^ miles from east to 42° GEORGES BANK 64° 60* 5tf Fig. 1.—Nova Scotia and the surrounding continental shelf,area denotes the region encompassed by this study. The framed Narrow, subaerially exposed bars extend beyond these dunes forseveral miles. A series of large parallel dune ridges, oriented east to west, form thebackbone of the island. Dunes average 20 to 50 feet in height, withsteep dune scarps, free of vegetation, facing the sea on both sides ofthe island. Dune slopes, covered with sparse vegetation, slope gentlytoward the center of the island forming a sheltered hollow. The dunesare breached by several large blowouts oriented northwest to southeast(figs. 2 and 16). The south-central portion of the island is occupied by Lake Wallace, 4 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I52 a shallow brackish lake (fig. 2). The dune ridge south of the lake hasalmost been destroyed, resulting in a large beach flat. Areal extent ofthe lake depends upon precipitation an
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