| Description |
Shows a variety of beaches and headlands, their contours, and evidence of a continuing interaction between land and water. Uses film sequences, photographs and demonstrations to illustrate the causes and effects of currents, waves, and tides. Explains their part in building up and destroying the shoreline. Tells how living organisms also protect and build up the land and at the same time help destroy it. Points out the destructive work of the rock-boring clams, urchins, and the contributions of kelp, other algae, and the tube worms in building up the beach area. Concludes with film clips of the octopus.
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