tag:blogger.com,1999:blog-8712540294522210240.post5402986808151500873..comments2024-03-06T22:08:30.648-08:00Comments on The Dynamic Earth: Trace Fossils - Critterology meets SedimentologyErichttp://www.blogger.com/profile/01969672173684293621noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-8712540294522210240.post-25036259622524545622008-02-28T10:40:00.000-08:002008-02-28T10:40:00.000-08:00Dear Core-girl,Agrichnia (farming traces) are trad...Dear Core-girl,<BR/><BR/>Agrichnia (farming traces) are traditionally categorized into meandering, spiral networks and regular geometrical networks that show no evidence for backfilling. The idea is that the critters made a network of tunnels or furrows that would either capture and concentrate organic bits OR serve as a substrate upon which bacteria would grow (which the critter would then munch on). <BR/><BR/>Examples of the spiralling variety include Spiroraphe and Cosmoraphe. Don't have enough to read, you say? Well, we'll see what we can do about that:<BR/><BR/>Orr, P.J., 2001, Colonization of the deep-marine environment during the early Phanerozoic: the ichnofaunal record: Geological Journal, v. 36, p. 265-278.<BR/><BR/>Seilacher, A., 1989, Spirocosmoraphe, a new graphoglyptid trace fossil: Journal of Paleontology, v. 63, p. 116-117.<BR/><BR/>Leszczynski, S., and Seilacher, A., 1991, Ichnocoenoses of a turbidite sole: Ichnos, v. 1, p. 292-303.<BR/><BR/>The flag ship trace fossil for the geometrical farming trace is Paleodictyon, which makes some really slick hexagonal pattern traces. Do a google image search, and you'll come up with some nice pictures.<BR/><BR/>PAPERWISE, however, I can recommend:<BR/><BR/>Crimes, T.P., and Crossley, J.D., 1991, A diverse ichnofauna from Silurian flysch of the Aerytwyth Grits Formation, Wales: Geological Journal, v. 26, p. 27-64.<BR/><BR/>Ekdale, A.A., 1980, Grapholyptid burrows in modern deep-sea sediment: Science, v. 207, p. 304-306.<BR/><BR/>Wetzel, A., 2000, Giant Paleodictyon in Eocene flysch: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 160, p. 171-178.Erichttps://www.blogger.com/profile/01969672173684293621noreply@blogger.comtag:blogger.com,1999:blog-8712540294522210240.post-7828212319148678012008-02-28T10:10:00.000-08:002008-02-28T10:10:00.000-08:00Dear Ichno,I was wondering what an example of an a...Dear Ichno,<BR/><BR/>I was wondering what an example of an agrichnia would be? <BR/><BR/>Feelin' frustrated over farmin' traces, <BR/>jJeannettehttps://www.blogger.com/profile/17230927794829413824noreply@blogger.com