A341    Periodical contribution:     Pemberton, S. George and Robert W. Frey. 1990. Darwin on worms: the advent of experimental neoichnology. Ichnos 1: 65-71.   Text   Image

Darwin's field. The resulting vertical profile, therefore, consisted of 7 to 8 inches of stone-free, fine-grained mold overlying a stony substratum resulting from bioturbation by worms. Darwin's earlier description of these phenomena (Darwin, 1840) is probably the first detailed account of biogenic graded bedding in the literature (Fig. 3). Darwin was fascinated by the burial of objects by the burrowing activity of worms, and he went into great detail outlining the undermining of the Stone