Isotopes, ice ages, and terminal Proterozoic earth history
Open accessAbstract
Detailed correlations of ancient glacial deposits, based on temporal records of carbon and strontium isotopes in seawater, indicate four (and perhaps five) discrete ice ages in the terminal Proterozoic Eon. The close and repeated stratigraphic relationship between C-isotopic excursions and glaciogenic rocks suggests that unusually high rates of organic carbon burial facilitated glaciation by reducing atmospheric greenhouse capacity. The emerging framework of time and environmental change contributes to the improved resolution of stratigraphic and evolutionary pattern in the early fossil record of animals.
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Multiple major continental glaciations occurred between about 760 and 580 Mya, and at least one possibly involved sea-level glaciation at near-equatorial latitudes.
“The latest Neoproterozoic is immediately preceded by multiple major continental glaciations that occurred between about 760 and 580 Mya (Kaufman et al., 1997).At least one and possibly more of these events involved glaciation at sea level at near-equatorial latitudes, a highly unusual occurrence.”
From The last common bilaterian ancestor (2002) · cites this paper as Kaufman et al., 1997
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- Authors
- Kaufman, A. J., Knoll, A. H., & Narbonne, G. M.
- Affiliations
- Harvard University (US)
- Venue
- Proceedings of the National Academy of Sciences
- Publisher
- National Academy of Sciences
- Published
- 1997-06-24
- Volume
- 94
- Issue
- 13
- Pages
- 6600-6605
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- PMC
- PMC21204
- OpenAlex
- W2167166970
- Cited by
- 509
- References
- 4
- Citations by year
- 2026: 5 · 2025: 8 · 2024: 7 · 2023: 11 · 2022: 10 · 2021: 15 · 2020: 8 · 2019: 15 · 2018: 18 · 2017: 14 · 2016: 13 · 2015: 20 · 2014: 10 · 2013: 23 · 2012: 19
- FWCI
- 19.60
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Proceedings of the National Academy of Sciences (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
- Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
- Keywords
- ice ages, carbon isotopes, strontium isotopes, seawater isotopes, glacial deposits, organic carbon burial, glaciation, Precambrian stratigraphy
- MeSH terms
- Animals, Australia, Canada, Carbon Isotopes, Cold Climate, Fossils, Geology, Ice, Namibia, Paleontology, Seawater, Strontium Isotopes, Svalbard, Earth, Planet, Geologic Sediments, Evolution, Planetary, Geological Phenomena
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