Abstract

"There is no fossil network described in the geologic literature that could be held to have originated from the activity of tadpoles. With one exception all of them are not a primary (positive) but secondary (bas-relief casts or hyeroglyphs) structures and are on the lower surface of a bed. They are of an organic origin but may be only imprints of algae. . . . or as traces of worm-activity. They all are related to the group of Paleodictyonidae."

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