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Journal Article

Nest Structure for Sauropods: Sedimentary Criteria for Recognition of Dinosaur Nesting Traces

Luis M. Chiappe, James G. Schmitt, Frankie D. Jackson, Alberto Garrido, Lowell Dingus and Gerald Grellet-Tinner
PALAIOS
Vol. 19, No. 1 (Feb., 2004), pp. 89-95
Stable URL: http://www.jstor.org/stable/3515797
Page Count: 7

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Topics: Eggs, Sandstones, Animal nesting, Dinosaurs, Mudstone, Stone, Sediments, Lithology, Sedimentary structures, Geology
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Nest Structure for Sauropods: Sedimentary Criteria for Recognition of Dinosaur Nesting Traces
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Abstract

Six egg-filled depressions discovered in the Upper Cretaceous Anacleto Formation (Campanian) of Patagonia, Argentina, and interpreted as dinosaur nests, provide the only known evidence of titanosaurid sauropod nest construction. These nest trace fossils show truncation of sedimentary structures as well as differences in texture between the host substrate and in-filling sediment. Titanosaurid sauropods excavated and laid eggs in open nests rather than burying clutches in sediment. In addition, this paper establishes criteria for definitive recognition of excavated nests in the stratigraphic record.

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