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| López Cabrera,María I.; Olivero,Eduardo B.; Carmona,Noelia B.; Ponce,Juan J.. |
| The systematics, paleoenvironmental implications, and diversity of Cenozoic trace fossils from the Fuegian Andes are studied. The relatively complete Paleocene-Miocene stratigraphic column includes ichnoassemblages of the Cruziana (Leticia Formation, late Middle Eocene), Zoophycos and Nereites (Early Eocene-Early Miocene turbidite systems) ichnofacies. The last two ichnoasemblages contain the only known deep marine Cenozoic trace fossils in Argentina. The late Middle Eocene Leticia Formation represents a transgressive-regressive cycle and bears the ichnogenera Curvolithus, Diplocraterion, Gyrochorte, Rosselia, Patagonichnus, Asterosoma, Palaeophycus, Paradictyodora, Planolites, Rhizocorallium, Schaubcylindrichnus, Taenidium, and Teichichnus. Ichnogenera of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fuegian Andes; Cenozoic; Ichnology; Graphoglyptids; Turbidites. |
| Ano: 2008 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142008000200011 |
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| Olivero,Eduardo B.; López Cabrera,María I.. |
| Miocene tidal deposits from Las Grutas, Patagonia, Argentina, superbly preserve cylindrically laminated burrow systems including Asterosoma radiciforme von Otto and three compound ichnospecies of the newly proposed ichnogenus Patagonichnus ; P. calyciformis n. isp.; P. stratiformis n. isp.; and P . thalassiformis n. isp. Together with large, palmate burrows, probably produced by crustacean decapods, they are elite trace fossils. The Patagonichnus burrow systems consist of many distinctive concentrically laminated elementary components including: horizontal and vertical, conical and helicoidal bulbs and swellings; vertical shafts; straight and paired branches; and cone-in-cone structures. Hollow, branched, straight or helicoidal inner lined tubes connect... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trace fossils; Patagonichnus; Asterosoma; Miocene; Patagonia; Ethology; Polychaetes. |
| Ano: 2005 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142005000200002 |
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