An Expanded Model for Modern Shelf Sand Ridge Genesis and Evolution on the New Jersey Atlantic Shelf

A device for skimming floating material from a body of liquid, particularly useful with a pipe galvanizing apparatus for skimming dross from a zinc bath. The device includes paddles pivoted to a reciprocating carriage for dragging floating material to an edge of the vessel. The paddles pivot to positions in which their faces lie parallel with the direction of carriage movement to avoid pushing material back toward the interior of the vessel during return strokes of the carriage.