Ripple Marks Show That Countercurrent Exists in Florida Straits.
About 60 percent of the area shown in photographs taken at the axis of Florida Straits exhibits well-defined current ripple marks. These ripples indicate a flow of water of at least 0.2 to 0.6 knots from the north. This current is in the opposite direction from the surface currents of 2 to 4 or more knots.
Hurley
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