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Dinosaurs nesting on tidal flats


López Martínez, Nieves and Moratalla, J.J. and Sanz, J.L. (2000) Dinosaurs nesting on tidal flats. Palaeogeography, palaeoclimatology, palaeoecology , 160 (1-2). pp. 153-163. ISSN 0031-0182

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The discovery of a dinosaur clutch in Upper Cretaceous tidal flat deposits in the Tremp Formation in Biscarri,
Isona (Lleida, Spain), provides insight into the mode of life of some dinosaurs. The clutch occurs in grey marls that
were originally waterlogged, muddy sediments. The seven elongated eggs are parallel to each other and with their
long axis almost vertically oriented. A mound-nest is inferred in contrast to hole-nest described so far for similar eggshell types. The permeability of the eggshell (oospecies Megaloolithus siruguei) was highly enhanced by a braidednetwork of multicanaliculate pore canals. The nest style, eggshell porosity and tidal flat environment point to a periaquatic habitat for these dinosaurs. A modern analogue occurs in crocodiles, alligators and some birds living in periaquatic environments, with nesting on plant-mounds above waterlogged soils or even on floating vegetation.

Item Type:Article
Uncontrolled Keywords:Dinosaurs; Eggs; Nests; Spanish Pyrenees; Tidal flats; Upper Cretaceous
Subjects:Sciences > Geology > Paleontology
ID Code:9975
Deposited On:28 Jan 2010 14:57
Last Modified:01 Feb 2010 09:21

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