71.   His contributions to the study of the ocean floor date back many years.

72.   However, these blooms eventually fall to the ocean floor.

73.   I would have to sink concrete pillars into the ocean floor.

74.   Imagine him looking up on D-Day when the hulls of the allied armada glided overhead and cast their shadows on the ocean floor.

75.   In another competition, the survivors had to retrieve treasure chests filled with useful items from the ocean floor.

76.   In other cases, undersea landslides or earthquakes can crush cables lying on the ocean floor.

77.   In that area, shoals rise from the ocean floor, creating big swells during storms, he said.

78.   In some earthquakes, a tsunami, or a wave caused by a sudden shift in the ocean floor, is generated.

79.   In one scene, the crew waddles around the ocean floor in diving suits with what appear to be iron bread loaves strapped to their backs.

80.   In the vicinity of Iceland the salty water sinks to the ocean floor.