Beach sands investigation: The "Trough" area, South Stradbroke Island from 2100 feet north to 1100 feet north

The Trough Area extends parallel to and 200 to 300 feet west of the eastern beach from approximately 4800 feet north of the zero line shown on the locality plan, to 6000 feet south of the zero line. It has a flat sandy floor 150 to 200 feet wide, and a foot or two below water level. The "trough" is bounded on the east by the fore-dunes, and on the west by an area of shifting sand which rises sharply to elevations of 25 to 35 or 40 feet. Deposits of heavy minerals occur at or near the surface at several localities along the western edge of the trough. This report gives an estimate of the quantities of heavy minerals occurring from 2100 feet north to 1100 feet north.