气候变化领域集成服务门户(CCPortal): Palaeoecology of the archaeocyathan reefs from the lower Cambrian Harkless Formation; southern Nevada; western United States and carbon isotopic evidence for their demise

CCPortal

DOI	10.1016/j.palaeo.2019.109389
	Palaeoecology of the archaeocyathan reefs from the lower Cambrian Harkless Formation; southern Nevada; western United States and carbon isotopic evidence for their demise
	Pruss S.B.; Smith E.F.; Leadbetter O.; Nolan R.Z.; Hicks M.; Fike D.A.
发表日期	2019
ISSN	0031-0182
卷号	536
英文摘要	Archaeocyath sponges, the first group of reef-building organisms, have a globally distributed albeit restricted stratigraphic occurrence. Archaeocyathan reefs are well known from the western United States, particularly in units like the Montenegro, Poleta, and Harkless formations of the White-Inyo ranges and Esmeralda County, Nevada. While it is recognized that these organisms disappear at some time above the last occurrence of their reefs in the Harkless Formation, the precise timing of their disappearance is unknown. Here, we show that the last archaeocyathan reefs in the upper Harkless Formation near Gold Point, Nevada, are overlain by 20–60 m of interbedded siltstone and carbonate that preserve a negative carbon isotopic excursion consistent with the AECE event (archaeocyath extinction carbon excursion). Point counts of reef thin sections and analysis of acid-insoluble residues of reef and reef-adjacent samples illustrate that these last reefs also harbor previously undescribed diversity and abundance of animals living in and among the reefs, including an array of small shelly fossil taxa. We confirm previous work that the reefs of the early Cambrian were ecologically diverse and functioned in many ways like reefs of the later Paleozoic, even just prior to their global demise in the late early Cambrian, and that the extinction of archaeocyaths is recorded in strata of the Harkless Formation. © 2019 Elsevier B.V.
英文关键词	AECE; Carbon isotope excursion; Early Cambrian; Small shelly fossils
语种	英语
scopus关键词	Cambrian; carbon isotope; coral reef; fossil record; paleoecology; paleoenvironment; Paleozoic; shell; siltstone; sponge; Esmeralda County; Montenegro; Nevada; United States; Animalia; Archaeocyatha
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150754
作者单位	Department of Geosciences, Smith College, Northampton, MA 01063, United States; Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD 21218, United States; Department of Chemistry and Physical Sciences, Onondaga Community College, Syracuse, NY 13215,, United States; Department of Earth and Planetary Sciences, Washington University in St. Louis, St. Louis, MO 63130, United States
推荐引用方式 GB/T 7714	Pruss S.B.,Smith E.F.,Leadbetter O.,et al. Palaeoecology of the archaeocyathan reefs from the lower Cambrian Harkless Formation; southern Nevada; western United States and carbon isotopic evidence for their demise[J],2019,536.
APA	Pruss S.B.,Smith E.F.,Leadbetter O.,Nolan R.Z.,Hicks M.,&Fike D.A..(2019).Palaeoecology of the archaeocyathan reefs from the lower Cambrian Harkless Formation; southern Nevada; western United States and carbon isotopic evidence for their demise.Palaeogeography, Palaeoclimatology, Palaeoecology,536.
MLA	Pruss S.B.,et al."Palaeoecology of the archaeocyathan reefs from the lower Cambrian Harkless Formation; southern Nevada; western United States and carbon isotopic evidence for their demise".Palaeogeography, Palaeoclimatology, Palaeoecology 536(2019).