71.   Tau particles created in the maelstrom decayed into tau neutrinos, which streamed through thick layers of shielding that blocked most other particles and reached the emulsions.

72.   The closure came only a year after Mount Pinatubo erupted, covering the two bases and adjacent towns with a thick layer of ash.

73.   The eruptions may be repeated again and again over thousands or millions of years, eventually building up a thick layer cake of vast lava flows.

74.   The exterior wood is protected with three thick layers of oil-based primer and paint from Historic Paints Ltd. in Cooperstown, N.Y.

75.   The ensuing fire consumed everything in its path, leaving behind a thick layer of ash.

76.   The floor of the attic is covered with a thick layer of insulation and we have discovered that this insulation is wet.

77.   The hint of Cognac in the rich mousse filling and the thick layer of whipped cream might help make winter quite bearable.

78.   The ground is covered with a thick layer of debris so nothing can grow.

79.   The ground was frozen, a thick layer of white powder stretched from end zone to end zone.

80.   The one-room schoolhouse was wrecked, the textbooks ruined, the floor caked with a thick layer of ooze.