Preservation of aragonite in Late Cretaceous (Campanian) turtle eggshell

doi:10.1016/j.palaeo.2021.110741

IVPP-IR > 中科院古脊椎所（2000年以后）

	Preservation of aragonite in Late Cretaceous (Campanian) turtle eggshell
	Choi, Seung 1,5; Kim, Noe-Heon 2; Kim, Hyo-Im 3,4; Kweon, Jin Jung 2; Lee, Sung Keun 2; Zhang, Shukang 5; Varricchio, David J.1
	2022
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
卷号	585 页码:8
通讯作者	Choi, Seung(seung0521@gmail.com) ; Varricchio, David J.(djv@montana.edu)
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.
关键词	Aragonite EBSD Eggshell Judith River Formation Raman spectroscopy Turtle
DOI	10.1016/j.palaeo.2021.110741
关键词[WOS]	BACKSCATTER DIFFRACTION EBSD ; JUDITH RIVER FORMATION ; CALCITE TRANSFORMATION ; FOSSIL ; SHELL ; DIAGENESIS ; EVOLUTION ; MONTANA ; INSIGHT ; EMBRYOS
收录类别	SCI
语种	英语
资助项目	National Research Foundation of Korea - Ministry of Education[2020R1A6A3A03038316] ; National Research Foundation of Korea - Ministry of Science and ICT[2020R1A3B2079815]
项目资助者	National Research Foundation of Korea - Ministry of Education ; National Research Foundation of Korea - Ministry of Science and ICT
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000727258500002
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/19099
专题	中科院古脊椎所（2000年以后）
通讯作者	Choi, Seung; Varricchio, David J.
作者单位	1.Montana State Univ, Dept Earth Sci, Bozeman, MT 59717 USA 2.Seoul Natl Univ, Sch Earth & Environm Sci, Seoul 08826, South Korea 3.Gyeongsang Natl Univ, Dept Geol, Jinju 52828, South Korea 4.Gyeongsang Natl Univ, Res Inst Nat Sci, Jinju 52828, South Korea 5.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China
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.