The ‘burden of proof’ needed for the demonstration of the earliest cellular life is very great indeed. Compelling proof requires the demonstration of multiple, in situ and mutually supporting lines of evidence to fulfil the aforementioned criteria: for a wellconstrained age and context; evidence for a morphology unique to biology; and more than a single line of geochemical evidence for metabolic cycling; together with falsification of the null hypothesis of plausible non-biological origins (see for example Brasieret al., 2004, 2005, 2006 and references therein). This section of the book points the reader to the best areas of the world in which to search for signs of early life and the types of rocks to look for, before Chapter 5 discusses the techniques to use to analyse these rocks.
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Recommended Reading for Archean Rock Types
Brasier, M. D., Green, O. R., and Mcloughlin, N., 2004, Characterization and critical testing of potential microfossils from the early Earth: the Apex ‘microfossil debate’ and its lessons for Mars sample return, International Journal of Astrobiology 3: 1–12.
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Kiyokawa, S., Ito, T., Ikehara, M., and Kitajima, F., 2006, Middle Archean volcano-hydrothermal sequence: Bacterial microfossil-like bearing 3.2 Ga Dixon Island Formation, coastal Pilbara terrane, Australia, Bulletin of the Geological Society of America 118: 3–22.
Lowe, D. R., 1999, Petrology and sedimentology of cherts and related silicified sedimentary rocks in the Swaziland Supergroup, In: Lowe, D. R., and Byerly, G. R. (eds.), Geologic evolution of the Barberton Greenstone Belt, South Africa, Geological Society of America Special Paper 329: 83–114.
Noffke, N., Eriksson, K. A., Hazen, R. M., and Simpson, E. L., 2006, A new window into Early Archean life: microbial mats in Earth's oldest siliciclastic tidal deposits (3.2 Ga Moodies Group, South Africa), Geology 34: 253–256.
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Sugitani, K., 1992, Geochemical characteristics of Archean cherts and other sedimentary rocks in the Pilbara Block, Western Australia: evidence for Archean seawater enriched in hydrothermally-derived iron and silica, Precambrian Research 57: 21–47.
Staudigel, H., Furnes, H., Banerjee, N. R., Dilek, Y., and Muehlenbachs, K., 2006, Microbes and volcanoes: A tale from the oceans, ophiolites and greenstone belts, GSA Today 16: 4–11.
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Vearncombe, S., Barley, M. E., Groves, D. I., McNaughton, N. J., Mikucki, E. J., and Vearncombe, J. R., 1995, 3.26 Ga black smoker type mineralization in the Strelley Belt, Pilbara Craton, Western Australia, Journal of the Geological Society of London 152: 587–590.
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Recommended Reading for Pilbara Geology
Buick, R., Thornett, J. R., McNaughton, N. J., Smith, J. B., Barley, M. E., and Savage, M., 1995, Record of emergent continental crust ~3.5 billion years ago in the Pilbara craton of Australia, Nature 375: 574–577.
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Hickman, A. H., 2004, Two contrasting granite-greenstone terranes in the Pilbara Craton, Australia: evidence for vertical and horizontal tectonic regimes prior to 2900 Ma, Precambrian Research 131: 153–172.
Kiyokawa, S., and Taira, A., 1998, The Cleaverville Group in the West Pilbara coastal granitoid-greenstone terrain of Western Australia: an example of a Middle Archean immature oceanic island-arc succession, Precambrian Research 88: 109–142.
Lowe, D. R., 1983, Restricted shallow-water sedimentation of early Archaean stromatolitic and evaporitic strata of the Strelley Pool chert, Pilbara block, Western Australia, Precambrian Research 19: 239–283.
Smithies, R. H., Van Kranendonk, M. J., and Champion, D. C., 2005, It started with a plume —early Archaean basaltic proto-continental crust, Earth and Planetary Science Letters 238: 284–297.
Van Kranendonk, M. J., 2006, Volcanic degassing, hydrothermal circulation and the flourishing of early life on Earth: new evidence from the Warrawoona Group, Pilbara Craton, Western Australia, Earth-Science Reviews 74: 197–124.
Van Kranendonk, M. J., Hickman, A. H., Williams, I. R., and Nijman, W., 2001, Archean Geology of the East Pilbara Granite-Greenstone Terrane Western Australia—A Field Guide, Western Australia Geological Survey Record 2001/9: 134 p.
Van Kranendonk, M. J., Hickman, A. H., Smithies, R. H., and Nelson, D., 2002, Geology and tectonic evolution of the Archean North Pilbara Terrain, Pilbara Craton, Western Australia, Economic Geology 97: 695–732.
Van Kranendonk, M. J., Hickman, A. H., and Huston, D. L., 2006, Geology and mineralization of the East Pilbara —a field guide, Western Australia Geological Survey Record 2006/16: 90 p.
Van Kranendonk, M. J., Smithies, R. H., Hickman, A. H., and Champion, D. C., 2007, Review: secular tectonic evolution of Archean continental crust: interplay between horizontal and vertical processes in the formation of the Pilbara Craton, Australia, Terra Nova 19: 1–38.
Wacey, D., McLoughlin, N., Green, O. R., Parnell, J., Stoakes, C. A., and Brasier, M. D., 2006, The ~3.4 billion-year-old Strelley Pool sandstone: a new window into early life on Earth, International Journal of Astrobiology 5: 333–342.
Wacey, D., McLoughlin, N., Stoakes, C. A., Kilburn, M. R., Green, O. R., and Brasier, M. D., 2008, The ~3.4 Ga Strelley Pool Chert in the East Strelley greenstone belt—a field and petrographic guide, Western Australia Geological Survey Record.
Recommended Reading for South-West Greenland Geology
Appel, P. W. U., Moorbath, S., and Touret, J. L. R., 2003, Early Archaean processes and the Isua Greenstone Belt, West Greenland, Precambrian Research 126: 173–179.
Dauphas, N., van Zuilen, M., Wadhwa, M., Davis, A. M., Marty, B., and Janney, P. E., 2004, Clues from Fe isotope variations on the origin of early Archean BIFs from Greenland, Science 306: 2077–2080.
Fedo, C. M., and Whitehouse, M. J., 2002, Metasomatic origin of quartz-pyroxene rock, Akilia, Greenland, and its implications for Earth's earliest life, Science 296: 1448–1452.
Kamber, B. S., Moorbath, S., and Whitehouse, M. J., 2001, The oldest rocks on Earth: time constraints and geological controversies, Special Publication of the Geological Society of London 290: 177–203.
Lepland, A., Arrhenius, G., and Cornell, D., 2002, Apatite in the Early Archean Isua supracrustal rocks, southern West Greenland: its origin, association with graphite and potential as a biomarker, Precambrian Research 118: 221–241.
Lepland, A., van Zuilen, M. A., Arrehnius, G., Whitehouse, M. J., and Fedo, C. M., 2005, Questioning the evidence for earth's earliest life —Akilia revisited, Geology 33: 77–79.
Manning, C. E., Mojzsis, S. J., and Harrison, M. T., 2006, Geology, age and origin of supracrustal rocks at Akilia, west Greenland, American Journal of Science 306: 303–366.
Mojzsis, S. J., Arrenhius, G., McKeegan, K. D., Harrison, T. M., Nutman, A. P., and Friend, C. R. L., 1996, Evidence for life on Earth 3,800 million years ago, Nature 384: 55–59.
Moorbath, S., O'Nions, R. K., and Pankhurst, R. J., 1973, Early Archaean age for the Isua iron formation, West Greenland, Nature 245: 138–139.
Nutman, A. P., McGregor, V. R., Friend, C. R. L., Bennett, V. C., and Kinny, P. D., 1996, The Itsaq Gneiss Complex of southern West Greenland; the world's most extensive record of early crustal evolution (3900–3600 Ma), Precambrian Research 78: 1–39.
Nutman, A. P., Mojzsis, S. J., and Friend, C. R. L., 1997, Recognition of 3850 Ma water-lain sediments in West Greenland and their significance for the early Archaean Earth, Geochimicaet Cosmochimica Acta 61: 2475–2484.
Rosing, M. T., 1999, 13C Depleted carbon microparticles in >3700-Ma sea-floor sedimentary rocks from West Greenland, Science 283: 674–676.
van Zuilen, M. A., Lepland, A., and Arhenius, G., 2002, Reassessing the evidence for the earliest traces of life, Nature 418: 627–630.
van Zuilen, M. A., Lepland, A., Teranes, J., Finarelli, J., Wahlen, M., and Arrhenius, G., 2003, Graphite and carbonates in the 3.8 Ga old Isua Supracrustal Belt, southern West Greenland, Precambrian Research 126: 331–348.
Whitehouse, M. J., and Fedo, C. M., 2007, Searching for Earth's earliest life in southern West Greenland —history, current status and future prospects. In: Va n Kranendonk, M. J., Smithies, H., and Bennett, V. (Eds.) Earth's Oldest Rocks. Developments in Precambrian Geology 15: 841–853.
Recommended Reading for South-West Greenland Geology
Appel, P. W. U., Moorbath, S., and Touret, J. L. R., 2003, Early Archaean processes and the Isua Greenstone Belt, West Greenland, Precambrian Research 126: 173–179.
Dauphas, N., van Zuilen, M., Wadhwa, M., Davis, A. M., Marty, B., and Janney, P. E., 2004, Clues from Fe isotope variations on the origin of early Archean BIFs from Greenland, Science 306: 2077–2080.
Fedo, C. M., and Whitehouse, M. J., 2002, Metasomatic origin of quartz-pyroxene rock, Akilia, Greenland, and its implications for Earth’s earliest life, Science 296: 1448–1452.
Kamber, B. S., Moorbath, S., and Whitehouse, M. J., 2001, The oldest rocks on Earth: time constraints and geological controversies, Special Publication of the Geological Society of London 290: 177–203.
Lepland, A., Arrhenius, G., and Cornell, D., 2002, Apatite in the Early Archean Isua supracrustal rocks, southern West Greenland: its origin, association with graphite and potential as a biomarker, Precambrian Research 118: 221–241.
Lepland, A., van Zuilen, M. A., Arrehnius, G., Whitehouse, M. J., and Fedo, C. M., 2005, Questioning the evidence for earth’s earliest life – Akilia revisited, Geology 33: 77–79.
Manning, C. E., Mojzsis, S. J., and Harrison, M. T., 2006, Geology, age and origin of supracrustal rocks at Akilia, west Greenland, American Journal of Science 306: 303–366.
Mojzsis, S. J., Arrenhius, G., McKeegan, K. D., Harrison, T. M., Nutman, A. P., and Friend, C. R. L., 1996, Evidence for life on Earth 3,800 million years ago, Nature 384: 55–59.
Moorbath, S., O’Nions, R. K., and Pankhurst, R. J., 1973, Early Archaean age for the Isua iron formation, West Greenland, Nature 245: 138–139.
Nutman, A. P., McGregor, V. R., Friend, C. R. L., Bennett, V. C., and Kinny, P. D., 1996, The Itsaq Gneiss Complex of southern West Greenland; the world’s most extensive record of early crustal evolution (3900–3600 Ma), Precambrian Research 78: 1–39.
Nutman, A. P., Mojzsis, S. J., and Friend, C. R. L., 1997, Recognition of ≥3850 Ma water-lain sediments in West Greenland and their significance for the early Archaean Earth, Geochimica et Cosmochimica Acta 61: 2475–2484.
Rosing, M. T., 1999, 13C Depleted carbon microparticles in >3700-Ma sea-floor sedimentary rocks from West Greenland, Science 283: 674–676.
van Zuilen, M. A., Lepland, A., and Arhenius, G., 2002, Reassessing the evidence for the earliest traces of life, Nature 418: 627–630.
van Zuilen, M. A., Lepland, A., Teranes, J., Finarelli, J., Wahlen, M., and Arrhenius, G., 2003, Graphite and carbonates in the 3.8 Ga old Isua Supracrustal Belt, southern West Greenland, Precambrian Research 126: 331–348.
Whitehouse, M. J., and Fedo, C. M., 2007, Searching for Earth’s earliest life in southern West Greenland – history, current status and future prospects. In: Van Kranendonk, M. J., Smithies, H., and Bennett, V. (Eds.) Earth’s Oldest Rocks. Developments in Precambrian Geology 15: 841–853.
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(2009). Fulfilling the Criteria for Early Life on Earth. In: Wacey, D. (eds) Early Life on Earth. Topics in Geobiology, vol 31. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-9389-0_5
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