…In vain the mastodon retreats beneath its own powder’d bones, In vain objects stand leagues off and assume manifold shapes, In vain the ocean settling in hollows and the great monsters lying low, In vain the buzzard houses herself with the sky, In vain the snake slides through the creepers and logs, In vain the elk takes to the inner passes of the woods, In vain the razor-bill’d auk sails far north to Labrador, I follow quickly, I ascend to the nest in the fissure of the cliff.
There are no more uses of "fissure" in the book.
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The earthquake opened a small fissure across the road.
The crisis is creating a fissure in the coalition government.