Cited by 701Paleontology and Stratigraphy of FossilsGeological and Geochemical AnalysisEvolution and Paleontology Studies

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Biostratigraphic and Geochronologic Constraints on Early Animal Evolution

Grotzinger, John P., Bowring, Samuel A., Saylor, Beverly Z., Kaufman, Alan J.·1995·Science

DOI 10.1126/science.270.5236.598

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Abstract

Two distinct evolutionary pulses, represented by the Vendian Ediacaran fauna and Cambrian small shelly faunas, are generally thought to characterize the emergence of macroscopic animals at the end of Precambrian time. Biostratigraphic and uranium-lead zircon age data from Namibia indicate that most globally distributed Ediacaran fossils are no older than 549 million years old and some are as young as 543 million years old, essentially coincident with the Precambrian-Cambrian boundary. These data suggest that the most diverse assemblages of Ediacaran animals existed within 6 million years of the Precambrian-Cambrian boundary and that simple discoid animals may have appeared at least 50 million years earlier.

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Authors: Grotzinger, J. P., Bowring, S. A., Saylor, B. Z., & Kaufman, A. J.
Affiliations: Massachusetts Institute of Technology (US)
Harvard University (US)
ORCID: Grotzinger, John P.
Saylor, Beverly Z.
Kaufman, Alan J.
Venue: Science
Publisher: American Association for the Advancement of Science (AAAS)
Published: 1995-10-27
Volume: 270
Issue: 5236
Pages: 598-604
ISSN: 0036-8075 (ISSN-L)
1095-9203
DOI: 10.1126/science.270.5236.598
OpenAlex: W1995137647
Cited by: 701
References: 46
Citations by year: 2026: 9 · 2025: 15 · 2024: 16 · 2023: 19 · 2022: 10 · 2021: 25 · 2020: 29 · 2019: 16 · 2018: 22 · 2017: 18 · 2016: 17 · 2015: 26 · 2014: 28 · 2013: 14 · 2012: 26
FWCI: 31.85
Type: journal article
Language: en
Open access: closed
Locations: Science (publishedVersion)
Topics: Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geological and Geochemical Analysis
Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
Keywords: early animal evolution, Ediacaran fauna, Ediacaran, Precambrian-Cambrian boundary, small shelly fossils, zircon U-Pb geochronology, biostratigraphy, Namibia

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Biostratigraphic and Geochronologic Constraints on Early Animal Evolution

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