On Monday afternoon I went out to Newcomb Hollow, where an enormous amount of sand had been removed from the beach by the new moon tides and easterly winds of the past couple of days. The beach erosion revealed a horizontal floor of blue clay that ran along the base of the cliffs for at least 200 feet in a band 20 to 30 feet wide. These wide, horizontal ledges were a mixture of solid-blue and yellow-reddish clay feathered with thin exfoliations of rust-colored iron oxide. The impression was that