Microfossils of the Early Archean Apex Chert: New Evidence of the Antiquity of Life
- J. Schopf
- Environmental ScienceScience
- 30 April 1993
It is established that trichomic cyanobacterium-like microorganisms were extant and morphologically diverse at least as early as ∼3465 million years ago and suggests that oxygen-producing photoautotrophy may have already evolved by this early stage in biotic history.
Early Archean (3.3-billion to 3.5-billion-year-old) microfossils from Warrawoona Group, Australia.
Cellularly preserved filamentous and colonial fossil microorganisms have been discovered in bedded carbonaceous cherts from the Early Archean Apex Basalt and Towers Formation of northwestern Western…
Microflora of the Bitter Springs Formation, late Precambrian, central Australia
- J. Schopf
- Geology, Environmental Science
- 1 May 1968
Thirty new species, representing 24 new genera, of green algae, blue-green algae, colonial bacteria, fungus-like filaments, and possible pyrrophytes, are described from the bedded carbonaceous cherts…
Fossil evidence of Archaean life
- J. Schopf
- GeologyPhilosophical Transactions of the Royal Society B…
- 29 June 2006
Compilations support the view that life's existence dates from more than or equal to 3500 Myr ago.
Laser–Raman imagery of Earth's earliest fossils
- J. Schopf, A. Kudryavtsev, D. Agresti, T. Wdowiak, A. Czaja
- Geography, GeologyNature
- 7 March 2002
This work applies laser–Raman spectroscopic imagery of individual microscopic fossils to exceptionally ancient fossil microbe-like objects, including the oldest such specimens reported from the geological record, and shows that the results obtained substantiate the biological origin of the earliest cellular fossils known.
Evidence of Archean life: Stromatolites and microfossils
- J. Schopf, A. Kudryavtsev, A. Czaja, Abhishek B. Tripathi
- Geography, Environmental Science
- 5 October 2007
The Fossil Record: Tracing the Roots of the Cyanobacterial Lineage
- J. Schopf
- Geography, Environmental Science
- 2000
Mutually reinforcing lines of evidence indicate that stromatoliticmicrobial ecosystems, evidently including cyanobacteria and other members of the bacterial domain, were extant ~3500 Ma ago; methanogenic archaeans by ~2800 Ma lately; and Gram-negative sulfate-reducing bacteria at least as early as ~2700Ma ago.
The Proterozoic biosphere : a multidisciplinary study
List of contributors Preface Part I: 1. Geology and paleobiology of the Archean Earth 2. Geological evolution of the Proterozoic Earth 3. Proterozoic biochemistry 4. Proterozoic atmosphere and ocean…
Filamentous fossil bacteria from the Archean of Western Australia
- S. Awramik, J. Schopf, M. Walter
- Geography, Environmental Science
- 1 June 1983
Cradle of Life: The Discovery of Earth's Earliest Fossils
One of the greatest mysteries in reconstructing the history of life on Earth has been the apparent absence of fossils dating back more than 500 million years. We have long known that fossils of…
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