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Preservation of aragonite in Late Cretaceous (Campanian) turtle eggshell

文献类型：期刊论文

作者Choi, Seung1,5; Kim, Noe-Heon4; Kim, Hyo-Im2,3; Kweon, Jin Jung4; Lee, Sung Keun4; Zhang, Shukang1; Varricchio, David J.5
刊名PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
出版日期2022
卷号585页码:8
关键词Aragonite EBSD Eggshell Judith River Formation Raman spectroscopy Turtle
ISSN号0031-0182
DOI10.1016/j.palaeo.2021.110741
通讯作者Choi, Seung(seung0521@gmail.com) ; Varricchio, David J.(djv@montana.edu)
英文摘要Among amniotes, turtles are the only clade that lay aragonitic eggs. Because aragonite is a metastable mineral, unequivocal preservation of aragonite in fossil turtle eggs has only been reported from Pliocene deposits. Here, we report in situ preservation of aragonite in a turtle egg from the Judith River Formation (Campanian) of Montana, USA. We utilized electron backscatter diffraction (EBSD) and Raman spectroscopy to explore the carbonate mineral polymorphs in the eggshell. The EBSD maps show the presence of both aragonite and calcite with the former preserved as needle-like crystal, a feature of all turtle eggshells. The presence of aragonite is independently validated by Raman maps. This dual approach provides direct, unambiguous evidence that the record of aragonitic turtle eggshell dates back at least to the Campanian (ca. 76 Ma) and supports the hypothesis that aragonitic eggshell is a synapomorphy of all turtles. The presence of pristine aragonite also indicates minimal taphonomic alteration at the fossil locality. Consequently, diverse invertebrate or vertebrate fossils from localities with aragonitic turtle eggs may provide high quality, unaltered palaeoenvironmental information.
WOS关键词BACKSCATTER DIFFRACTION EBSD ; JUDITH RIVER FORMATION ; CALCITE TRANSFORMATION ; FOSSIL ; SHELL ; DIAGENESIS ; EVOLUTION ; MONTANA ; INSIGHT ; EMBRYOS
资助项目National Research Foundation of Korea - Ministry of Education[2020R1A6A3A03038316] ; National Research Foundation of Korea - Ministry of Science and ICT[2020R1A3B2079815]
WOS研究方向Physical Geography ; Geology ; Paleontology
语种英语
WOS记录号WOS:000727258500002
出版者ELSEVIER
资助机构National Research Foundation of Korea - Ministry of Education ; National Research Foundation of Korea - Ministry of Science and ICT
源URL[http://119.78.100.205/handle/311034/19098]  
专题古脊椎动物与古人类研究所_图书馆1
通讯作者Choi, Seung; Varricchio, David J.
作者单位1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China
2.Gyeongsang Natl Univ, Res Inst Nat Sci, Jinju 52828, South Korea
3.Gyeongsang Natl Univ, Dept Geol, Jinju 52828, South Korea
4.Seoul Natl Univ, Sch Earth & Environm Sci, Seoul 08826, South Korea
5.Montana State Univ, Dept Earth Sci, Bozeman, MT 59717 USA
推荐引用方式
GB/T 7714		 Choi, Seung,Kim, Noe-Heon,Kim, Hyo-Im,et al. Preservation of aragonite in Late Cretaceous (Campanian) turtle eggshell[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2022,585:8.
APA Choi, Seung.,Kim, Noe-Heon.,Kim, Hyo-Im.,Kweon, Jin Jung.,Lee, Sung Keun.,...&Varricchio, David J..(2022).Preservation of aragonite in Late Cretaceous (Campanian) turtle eggshell.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,585,8.
MLA Choi, Seung,et al."Preservation of aragonite in Late Cretaceous (Campanian) turtle eggshell".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 585(2022):8.

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来源：古脊椎动物与古人类研究所

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