DOI: 10.1016/j.palaeo.2013.05.031
论文题名: Influence of vertisol development on sauropod egg taphonomy and distribution at the auca mahuevo locality, Patagonia, Argentina
作者: Jackson F.D. ; Schmitt J.G. ; Oser S.E.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 386 起始页码: 300
结束页码: 307
语种: 英语
英文关键词: Auca Mahuevo
; Paleo-Vertisols
; Sauropod eggs
英文摘要: At the Auca Mahuevo locality in the Upper Cretaceous Anacleto Formation in Patagonia, Argentina pedogenic processes associated with Vertisol development affected changes in both individual titanosaur egg morphology and three-dimensional egg distribution. These changes resulted primarily from vertical and lateral movement within fluvial overbank sediments due to clay mineral expansion and contraction in alternating wet and dry seasonal conditions. At the scale of individual sauropod eggs, pedogenic sediment movement produced egg shearing, eggshell fracture and displacement, mechanical abrasion of egg ornamentation, and alteration of egg size and shape. Movement of either individual eggs or subsets of eggs along slickensided surfaces (1) modified the number and relative position of eggs within individual clutches, (2) combined eggs of one of more clutches produced by different females, and (3) combined eggs from one or more nesting horizons, producing a time-averaged fossil assemblage. These mechanisms of egg rearrangement suggest that accurate interpretation of dinosaur reproductive behavior using fossil egg assemblages preserved in fine-grained fluvial overbank deposits require careful assessment of pedogenic processes. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69650
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth Sciences, Montana State University, 226 Traphagen Hall, Bozeman, MT 59717, United States
Recommended Citation:
Jackson F.D.,Schmitt J.G.,Oser S.E.. Influence of vertisol development on sauropod egg taphonomy and distribution at the auca mahuevo locality, Patagonia, Argentina[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,386