期刊
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
卷 268, 期 1-2, 页码 19-25出版社
ELSEVIER
DOI: 10.1016/j.palaeo.2008.07.022
关键词
Giant galleries; Trace fossils; Thalassinoides; Miocene; Betic Cordillera; Southeast Spain
资金
- RNM-178 Group (Junta de Andalucia)
- Univ. Granada-M.E.C. [AP2003-3810]
- NSERC [311726-05]
- [CGL2005-01316/BTE]
- [CGL 2004-04342]
Large burrow systems occur in the Miocene marine deposits of the Almeria-Nijar Basin (Betic Cordillera, Southeast Spain). They consist of galleries of dense burrow segments, locally forming irregular networks. Cylindrical, branched (Y-shaped) structures, with diameters ranging from 8 to 22 cm and minimum lengths of 30-60 cm are abundant. In addition, galleries longer than 70-80 cm are common, and burrow segments larger than 200 cm are locally present. Burrows have smooth walls, without pellet reinforcements, but locally possible Scratch marks are present. Burrow fill is structureless and has a similar composition to the host rock. These structures are assigned to the ichnogenus Thalassinoides Ehrenberg, displaying similarities with T suevicus. Identification of the possible tracemaker is not straightforward, but decapod crustaceans, probably shrimp or shrimp-like organisms, are the most likely candidates. (C) 2008 Elsevier B.V. All rights reserved.
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