... clay is of a dark-bluish or greenish-gray color, and so adhesive, that I now felt, when walking among it, after the softening rains of the previous night and morning, as if I had got into a bed of bird-lime. It is thinly charged with rolled pebbles, septaria, and pieces of a bituminous shale, containing broken ... — The Cruise of the Betsey • Hugh Miller
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