Early Earth (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Early Earth" in English language version.

refsWebsite

Global rank English rank

15doi.org

2^nd place

11harvard.edu

18^th place

17^th place

9nih.gov

4^th place

6worldcat.org

5^th place

5semanticscholar.org

11^th place

8^th place

2arxiv.org

69^th place

59^th place

2usgs.gov

167^th place

198^th place

2web.archive.org

1^st place

1eolss.net

low place

1stratigraphy.org

2,562^nd place

3,215^th place

1springer.com

274^th place

309^th place

1iop.org

1,725^th place

1,828^th place

1wiley.com

222^nd place

297^th place

1washingtonpost.com

34^th place

27^th place

1lyellcollection.org

6,584^th place

4,241^st place

1talkorigins.org

9,502^nd place

low place

1archive.org

6^th place

1excite.com

low place

9,059^th place

1pnas.org

1,293^rd place

3,794^th place

1scitechdaily.com

low place

1nasa.gov

75^th place

83^rd place

archive.org (Global: 6^th place; English: 6^th place)

Hamilton Raven, Peter; Brooks Johnson, George (2002). Biology. McGraw-Hill Education. p. 68. ISBN 978-0-07-112261-0. Retrieved 7 July 2013.

arxiv.org (Global: 69^th place; English: 59^th place)

Lammer, Helmut; Brasser, Ramon; Johansen, Anders; Scherf, Manuel; Leitzinger, Martin (2020-12-22). "Formation of Venus, Earth and Mars: Constrained by Isotopes". Space Science Reviews. 217 (1) 7. Springer Nature. arXiv:2102.06173. doi:10.1007/s11214-020-00778-4. Retrieved 2025-08-24.
Belbruno, Edward; Gott, J. Richard III (March 2005). "Where Did The Moon Come From?". The Astronomical Journal. 129 (3). IOP Publishing, American Astronomical Society: 1724–1745. arXiv:astro-ph/0405372. doi:10.1086/427539. Retrieved 2025-08-10.

doi.org (Global: 2^nd place; English: 2^nd place)

Rankama, Kalervo (May 1967). "Megayear and Gigayear: Two Units of Geological Time". Nature. 214 (5088): 634. Bibcode:1967Natur.214..634R. doi:10.1038/214634a0. ISSN 1476-4687.
Lammer, Helmut; Brasser, Ramon; Johansen, Anders; Scherf, Manuel; Leitzinger, Martin (2020-12-22). "Formation of Venus, Earth and Mars: Constrained by Isotopes". Space Science Reviews. 217 (1) 7. Springer Nature. arXiv:2102.06173. doi:10.1007/s11214-020-00778-4. Retrieved 2025-08-24.
Belbruno, Edward; Gott, J. Richard III (March 2005). "Where Did The Moon Come From?". The Astronomical Journal. 129 (3). IOP Publishing, American Astronomical Society: 1724–1745. arXiv:astro-ph/0405372. doi:10.1086/427539. Retrieved 2025-08-10.
Yu, Gang; Jacobsen, Stein B. (2011-10-17). "Fast accretion of the Earth with a late Moon-forming giant impact". PNAS. 108 (43). National Academy of Sciences: 17604–17609. doi:10.1073/pnas.1108544108. PMID 22006299.
Carlson, Richard W.; Garnero, Edward; Harrison, T. Mark; Li, Jie; Manga, Michael; McDonough, William F.; Mukhopadhyay, Sujoy; Romanowicz, Barbara; Rubie, David (2014-01-01). "How Did Early Earth Become Our Modern World?". Annual Review of Earth and Planetary Sciences. 42 (1): 151–178. Bibcode:2014AREPS..42..151C. doi:10.1146/annurev-earth-060313-055016.
Drake, Michael J.; Righter, Kevin (2002-03-07). "Determining the composition of the Earth". Nature. 416 (6876): 39–44. Bibcode:2002Natur.416...39D. doi:10.1038/416039a. ISSN 0028-0836. PMID 11882886. S2CID 4380038.
Dong, Junjie; Fischer, Rebecca A.; Stixrude, Lars P.; Lithgow-Bertelloni, Carolina R. (2021-03-09). "Constraining the Volume of Earth's Early Oceans With a Temperature-Dependent Mantle Water Storage Capacity Model". AGU Advances. 2 (1) e2020AV000323. American Geophysical Union. doi:10.1029/2020AV000323. Retrieved 2025-08-24.
Korenaga, Jun (2018-10-01). "Crustal evolution and mantle dynamics through Earth history". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 376 (2132) 20170408. Royal Society. doi:10.1098/rsta.2017.0408. eISSN 1471-2962. ISSN 1364-503X. PMC 6189559. PMID 30275159.
Wilde, Simon A.; Valley, John W.; Peck, William H.; Graham, Colin M. (2001-01-11). "Evidence from detrital zircons for the existence of continental crust and oceans on the Earth 4.4 Gyr ago : Abstract: Nature". Nature. 409 (6817): 175–178. Bibcode:2001Natur.409..175W. doi:10.1038/35051550. ISSN 0028-0836. PMID 11196637. S2CID 4319774.
Dalrymple, G. Brent (2001). "The age of the Earth in the twentieth century: a problem (mostly) solved". Special Publications, Geological Society of London. 190 (1): 205–221. Bibcode:2001GSLSP.190..205D. doi:10.1144/GSL.SP.2001.190.01.14. S2CID 130092094.
Manhesa, Gérard; Allègre, Claude J.; Dupréa, Bernard & Hamelin, Bruno (1980). "Lead isotope study of basic-ultrabasic layered complexes: Speculations about the age of the earth and primitive mantle characteristics". Earth and Planetary Science Letters. 47 (3): 370–382. Bibcode:1980E&PSL..47..370M. doi:10.1016/0012-821X(80)90024-2.
Onyett, Isaac J.; et al. (14 June 2023). "Silicon isotope constraints on terrestrial planet accretion". Nature. 619 (7970): 539–544. Bibcode:2023Natur.619..539O. doi:10.1038/s41586-023-06135-z. PMC 10356600. PMID 37316662. S2CID 259161680.
Dalrymple, G. Brent (2001). "The age of the Earth in the twentieth century: a problem (mostly) solved". Geological Society, London, Special Publications. 190 (1): 205–21. Bibcode:2001GSLSP.190..205D. doi:10.1144/GSL.SP.2001.190.01.14. S2CID 130092094. Retrieved 2007-09-20.
Ohtomo, Yoko; Kakegawa, Takeshi; Ishida, Akizumi; et al. (January 2014). "Evidence for biogenic graphite in early Archaean Isua metasedimentary rocks". Nature Geoscience. 7 (1): 25–28. Bibcode:2014NatGe...7...25O. doi:10.1038/ngeo2025. ISSN 1752-0894.
Bell, Elizabeth A.; Boehnike, Patrick; Harrison, T. Mark; et al. (19 October 2015). "Potentially biogenic carbon preserved in a 4.1 billion-year-old zircon" (PDF). Proc. Natl. Acad. Sci. U.S.A. 112 (47): 14518–21. Bibcode:2015PNAS..11214518B. doi:10.1073/pnas.1517557112. ISSN 1091-6490. PMC 4664351. PMID 26483481. Retrieved 2015-10-20. Early edition, published online before print.

eolss.net (Global: low place; English: low place)

Vaclav Cilek, ed. (2009). "Early Earth". Earth System: History and Natural Variability Volume I. Eolss Publishers. p. 98. ISBN 978-1-84826-104-4.

excite.com (Global: low place; English: 9,059^th place)

apnews.excite.com

Borenstein, Seth (19 October 2015). "Hints of life on what was thought to be desolate early Earth". Excite. Yonkers, NY: Mindspark Interactive Network. Associated Press. Archived from the original on 2015-10-23. Retrieved 2015-10-20.

harvard.edu (Global: 18^th place; English: 17^th place)

ui.adsabs.harvard.edu

Rankama, Kalervo (May 1967). "Megayear and Gigayear: Two Units of Geological Time". Nature. 214 (5088): 634. Bibcode:1967Natur.214..634R. doi:10.1038/214634a0. ISSN 1476-4687.
Carlson, Richard W.; Garnero, Edward; Harrison, T. Mark; Li, Jie; Manga, Michael; McDonough, William F.; Mukhopadhyay, Sujoy; Romanowicz, Barbara; Rubie, David (2014-01-01). "How Did Early Earth Become Our Modern World?". Annual Review of Earth and Planetary Sciences. 42 (1): 151–178. Bibcode:2014AREPS..42..151C. doi:10.1146/annurev-earth-060313-055016.
Drake, Michael J.; Righter, Kevin (2002-03-07). "Determining the composition of the Earth". Nature. 416 (6876): 39–44. Bibcode:2002Natur.416...39D. doi:10.1038/416039a. ISSN 0028-0836. PMID 11882886. S2CID 4380038.
Wilde, Simon A.; Valley, John W.; Peck, William H.; Graham, Colin M. (2001-01-11). "Evidence from detrital zircons for the existence of continental crust and oceans on the Earth 4.4 Gyr ago : Abstract: Nature". Nature. 409 (6817): 175–178. Bibcode:2001Natur.409..175W. doi:10.1038/35051550. ISSN 0028-0836. PMID 11196637. S2CID 4319774.
Dalrymple, G. Brent (2001). "The age of the Earth in the twentieth century: a problem (mostly) solved". Special Publications, Geological Society of London. 190 (1): 205–221. Bibcode:2001GSLSP.190..205D. doi:10.1144/GSL.SP.2001.190.01.14. S2CID 130092094.
Manhesa, Gérard; Allègre, Claude J.; Dupréa, Bernard & Hamelin, Bruno (1980). "Lead isotope study of basic-ultrabasic layered complexes: Speculations about the age of the earth and primitive mantle characteristics". Earth and Planetary Science Letters. 47 (3): 370–382. Bibcode:1980E&PSL..47..370M. doi:10.1016/0012-821X(80)90024-2.
Onyett, Isaac J.; et al. (14 June 2023). "Silicon isotope constraints on terrestrial planet accretion". Nature. 619 (7970): 539–544. Bibcode:2023Natur.619..539O. doi:10.1038/s41586-023-06135-z. PMC 10356600. PMID 37316662. S2CID 259161680.
Dalrymple, G. Brent (2001). "The age of the Earth in the twentieth century: a problem (mostly) solved". Geological Society, London, Special Publications. 190 (1): 205–21. Bibcode:2001GSLSP.190..205D. doi:10.1144/GSL.SP.2001.190.01.14. S2CID 130092094. Retrieved 2007-09-20.
Ohtomo, Yoko; Kakegawa, Takeshi; Ishida, Akizumi; et al. (January 2014). "Evidence for biogenic graphite in early Archaean Isua metasedimentary rocks". Nature Geoscience. 7 (1): 25–28. Bibcode:2014NatGe...7...25O. doi:10.1038/ngeo2025. ISSN 1752-0894.
Bell, Elizabeth A.; Boehnike, Patrick; Harrison, T. Mark; et al. (19 October 2015). "Potentially biogenic carbon preserved in a 4.1 billion-year-old zircon" (PDF). Proc. Natl. Acad. Sci. U.S.A. 112 (47): 14518–21. Bibcode:2015PNAS..11214518B. doi:10.1073/pnas.1517557112. ISSN 1091-6490. PMC 4664351. PMID 26483481. Retrieved 2015-10-20. Early edition, published online before print.
Arney, G. N.; Meadows, V. S.; Domagal-Goldman, S. D.; Claire, M.; Schwieterman, E. (2014). "The Pale Orange Dot: Spectral Effects of a Hazy Early Earth". AGU Fall Meeting Abstracts. 2014. Bibcode:2014AGUFMPP53A1202A.

iop.org (Global: 1,725^th place; English: 1,828^th place)

iopscience.iop.org

Belbruno, Edward; Gott, J. Richard III (March 2005). "Where Did The Moon Come From?". The Astronomical Journal. 129 (3). IOP Publishing, American Astronomical Society: 1724–1745. arXiv:astro-ph/0405372. doi:10.1086/427539. Retrieved 2025-08-10.

lyellcollection.org (Global: 6,584^th place; English: 4,241^st place)

sp.lyellcollection.org

Dalrymple, G. Brent (2001). "The age of the Earth in the twentieth century: a problem (mostly) solved". Geological Society, London, Special Publications. 190 (1): 205–21. Bibcode:2001GSLSP.190..205D. doi:10.1144/GSL.SP.2001.190.01.14. S2CID 130092094. Retrieved 2007-09-20.

nasa.gov (Global: 75^th place; English: 83^rd place)

"NASA Team Looks to Ancient Earth First to Study Hazy Exoplanets - NASA". 8 February 2017.

nih.gov (Global: 4^th place; English: 4^th place)

pubmed.ncbi.nlm.nih.gov

Yu, Gang; Jacobsen, Stein B. (2011-10-17). "Fast accretion of the Earth with a late Moon-forming giant impact". PNAS. 108 (43). National Academy of Sciences: 17604–17609. doi:10.1073/pnas.1108544108. PMID 22006299.
Drake, Michael J.; Righter, Kevin (2002-03-07). "Determining the composition of the Earth". Nature. 416 (6876): 39–44. Bibcode:2002Natur.416...39D. doi:10.1038/416039a. ISSN 0028-0836. PMID 11882886. S2CID 4380038.
Korenaga, Jun (2018-10-01). "Crustal evolution and mantle dynamics through Earth history". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 376 (2132) 20170408. Royal Society. doi:10.1098/rsta.2017.0408. eISSN 1471-2962. ISSN 1364-503X. PMC 6189559. PMID 30275159.
Wilde, Simon A.; Valley, John W.; Peck, William H.; Graham, Colin M. (2001-01-11). "Evidence from detrital zircons for the existence of continental crust and oceans on the Earth 4.4 Gyr ago : Abstract: Nature". Nature. 409 (6817): 175–178. Bibcode:2001Natur.409..175W. doi:10.1038/35051550. ISSN 0028-0836. PMID 11196637. S2CID 4319774.
Onyett, Isaac J.; et al. (14 June 2023). "Silicon isotope constraints on terrestrial planet accretion". Nature. 619 (7970): 539–544. Bibcode:2023Natur.619..539O. doi:10.1038/s41586-023-06135-z. PMC 10356600. PMID 37316662. S2CID 259161680.
Bell, Elizabeth A.; Boehnike, Patrick; Harrison, T. Mark; et al. (19 October 2015). "Potentially biogenic carbon preserved in a 4.1 billion-year-old zircon" (PDF). Proc. Natl. Acad. Sci. U.S.A. 112 (47): 14518–21. Bibcode:2015PNAS..11214518B. doi:10.1073/pnas.1517557112. ISSN 1091-6490. PMC 4664351. PMID 26483481. Retrieved 2015-10-20. Early edition, published online before print.

ncbi.nlm.nih.gov

Korenaga, Jun (2018-10-01). "Crustal evolution and mantle dynamics through Earth history". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 376 (2132) 20170408. Royal Society. doi:10.1098/rsta.2017.0408. eISSN 1471-2962. ISSN 1364-503X. PMC 6189559. PMID 30275159.
Onyett, Isaac J.; et al. (14 June 2023). "Silicon isotope constraints on terrestrial planet accretion". Nature. 619 (7970): 539–544. Bibcode:2023Natur.619..539O. doi:10.1038/s41586-023-06135-z. PMC 10356600. PMID 37316662. S2CID 259161680.
Bell, Elizabeth A.; Boehnike, Patrick; Harrison, T. Mark; et al. (19 October 2015). "Potentially biogenic carbon preserved in a 4.1 billion-year-old zircon" (PDF). Proc. Natl. Acad. Sci. U.S.A. 112 (47): 14518–21. Bibcode:2015PNAS..11214518B. doi:10.1073/pnas.1517557112. ISSN 1091-6490. PMC 4664351. PMID 26483481. Retrieved 2015-10-20. Early edition, published online before print.

pnas.org (Global: 1,293^rd place; English: 3,794^th place)

Bell, Elizabeth A.; Boehnike, Patrick; Harrison, T. Mark; et al. (19 October 2015). "Potentially biogenic carbon preserved in a 4.1 billion-year-old zircon" (PDF). Proc. Natl. Acad. Sci. U.S.A. 112 (47): 14518–21. Bibcode:2015PNAS..11214518B. doi:10.1073/pnas.1517557112. ISSN 1091-6490. PMC 4664351. PMID 26483481. Retrieved 2015-10-20. Early edition, published online before print.

scitechdaily.com (Global: low place; English: low place)

Zurich, Eth (29 November 2020). "Uncovering Mysteries of Earth's Primeval Atmosphere 4.5 Billion Years Ago and the Emergence of Life". Retrieved 30 November 2020.

semanticscholar.org (Global: 11^th place; English: 8^th place)

api.semanticscholar.org

Drake, Michael J.; Righter, Kevin (2002-03-07). "Determining the composition of the Earth". Nature. 416 (6876): 39–44. Bibcode:2002Natur.416...39D. doi:10.1038/416039a. ISSN 0028-0836. PMID 11882886. S2CID 4380038.
Wilde, Simon A.; Valley, John W.; Peck, William H.; Graham, Colin M. (2001-01-11). "Evidence from detrital zircons for the existence of continental crust and oceans on the Earth 4.4 Gyr ago : Abstract: Nature". Nature. 409 (6817): 175–178. Bibcode:2001Natur.409..175W. doi:10.1038/35051550. ISSN 0028-0836. PMID 11196637. S2CID 4319774.
Dalrymple, G. Brent (2001). "The age of the Earth in the twentieth century: a problem (mostly) solved". Special Publications, Geological Society of London. 190 (1): 205–221. Bibcode:2001GSLSP.190..205D. doi:10.1144/GSL.SP.2001.190.01.14. S2CID 130092094.
Onyett, Isaac J.; et al. (14 June 2023). "Silicon isotope constraints on terrestrial planet accretion". Nature. 619 (7970): 539–544. Bibcode:2023Natur.619..539O. doi:10.1038/s41586-023-06135-z. PMC 10356600. PMID 37316662. S2CID 259161680.
Dalrymple, G. Brent (2001). "The age of the Earth in the twentieth century: a problem (mostly) solved". Geological Society, London, Special Publications. 190 (1): 205–21. Bibcode:2001GSLSP.190..205D. doi:10.1144/GSL.SP.2001.190.01.14. S2CID 130092094. Retrieved 2007-09-20.

springer.com (Global: 274^th place; English: 309^th place)

link.springer.com

Lammer, Helmut; Brasser, Ramon; Johansen, Anders; Scherf, Manuel; Leitzinger, Martin (2020-12-22). "Formation of Venus, Earth and Mars: Constrained by Isotopes". Space Science Reviews. 217 (1) 7. Springer Nature. arXiv:2102.06173. doi:10.1007/s11214-020-00778-4. Retrieved 2025-08-24.

stratigraphy.org (Global: 2,562^nd place; English: 3,215^th place)

"International Chronostratigraphic Chart 2015" (PDF). ICS. Retrieved 23 January 2016.

talkorigins.org (Global: 9,502^nd place; English: low place)

Stassen, Chris (2005-09-10). "The Age of the Earth". TalkOrigins Archive. Retrieved 2008-12-30.

usgs.gov (Global: 167^th place; English: 198^th place)

pubs.usgs.gov

"Age of the Earth". U.S. Geological Survey. 1997. Archived from the original on 23 December 2005. Retrieved 2006-01-10.
Newman, William L. (2007-07-09). "Age of the Earth". Publications Services, USGS. Retrieved 2007-09-20.

washingtonpost.com (Global: 34^th place; English: 27^th place)

Patel, Kasha (16 June 2023). "Scientists have a controversial theory for how — and how fast — Earth formed". The Washington Post. Retrieved 17 June 2023.

web.archive.org (Global: 1^st place; English: 1^st place)

"Age of the Earth". U.S. Geological Survey. 1997. Archived from the original on 23 December 2005. Retrieved 2006-01-10.
Borenstein, Seth (19 October 2015). "Hints of life on what was thought to be desolate early Earth". Excite. Yonkers, NY: Mindspark Interactive Network. Associated Press. Archived from the original on 2015-10-23. Retrieved 2015-10-20.

wiley.com (Global: 222^nd place; English: 297^th place)

agupubs.onlinelibrary.wiley.com

Dong, Junjie; Fischer, Rebecca A.; Stixrude, Lars P.; Lithgow-Bertelloni, Carolina R. (2021-03-09). "Constraining the Volume of Earth's Early Oceans With a Temperature-Dependent Mantle Water Storage Capacity Model". AGU Advances. 2 (1) e2020AV000323. American Geophysical Union. doi:10.1029/2020AV000323. Retrieved 2025-08-24.

worldcat.org (Global: 5^th place; English: 5^th place)

search.worldcat.org

Rankama, Kalervo (May 1967). "Megayear and Gigayear: Two Units of Geological Time". Nature. 214 (5088): 634. Bibcode:1967Natur.214..634R. doi:10.1038/214634a0. ISSN 1476-4687.
Drake, Michael J.; Righter, Kevin (2002-03-07). "Determining the composition of the Earth". Nature. 416 (6876): 39–44. Bibcode:2002Natur.416...39D. doi:10.1038/416039a. ISSN 0028-0836. PMID 11882886. S2CID 4380038.
Korenaga, Jun (2018-10-01). "Crustal evolution and mantle dynamics through Earth history". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 376 (2132) 20170408. Royal Society. doi:10.1098/rsta.2017.0408. eISSN 1471-2962. ISSN 1364-503X. PMC 6189559. PMID 30275159.
Wilde, Simon A.; Valley, John W.; Peck, William H.; Graham, Colin M. (2001-01-11). "Evidence from detrital zircons for the existence of continental crust and oceans on the Earth 4.4 Gyr ago : Abstract: Nature". Nature. 409 (6817): 175–178. Bibcode:2001Natur.409..175W. doi:10.1038/35051550. ISSN 0028-0836. PMID 11196637. S2CID 4319774.
Ohtomo, Yoko; Kakegawa, Takeshi; Ishida, Akizumi; et al. (January 2014). "Evidence for biogenic graphite in early Archaean Isua metasedimentary rocks". Nature Geoscience. 7 (1): 25–28. Bibcode:2014NatGe...7...25O. doi:10.1038/ngeo2025. ISSN 1752-0894.
Bell, Elizabeth A.; Boehnike, Patrick; Harrison, T. Mark; et al. (19 October 2015). "Potentially biogenic carbon preserved in a 4.1 billion-year-old zircon" (PDF). Proc. Natl. Acad. Sci. U.S.A. 112 (47): 14518–21. Bibcode:2015PNAS..11214518B. doi:10.1073/pnas.1517557112. ISSN 1091-6490. PMC 4664351. PMID 26483481. Retrieved 2015-10-20. Early edition, published online before print.

Early Earth (English Wikipedia)

archive.org (Global: 6th place; English: 6th place)

arxiv.org (Global: 69th place; English: 59th place)

doi.org (Global: 2nd place; English: 2nd place)

eolss.net (Global: low place; English: low place)

excite.com (Global: low place; English: 9,059th place)

apnews.excite.com

harvard.edu (Global: 18th place; English: 17th place)

ui.adsabs.harvard.edu

iop.org (Global: 1,725th place; English: 1,828th place)

iopscience.iop.org

lyellcollection.org (Global: 6,584th place; English: 4,241st place)

sp.lyellcollection.org

nasa.gov (Global: 75th place; English: 83rd place)

nih.gov (Global: 4th place; English: 4th place)

pubmed.ncbi.nlm.nih.gov

ncbi.nlm.nih.gov

pnas.org (Global: 1,293rd place; English: 3,794th place)

scitechdaily.com (Global: low place; English: low place)

semanticscholar.org (Global: 11th place; English: 8th place)

api.semanticscholar.org

springer.com (Global: 274th place; English: 309th place)

link.springer.com

stratigraphy.org (Global: 2,562nd place; English: 3,215th place)

talkorigins.org (Global: 9,502nd place; English: low place)

usgs.gov (Global: 167th place; English: 198th place)

pubs.usgs.gov

washingtonpost.com (Global: 34th place; English: 27th place)

web.archive.org (Global: 1st place; English: 1st place)

wiley.com (Global: 222nd place; English: 297th place)

agupubs.onlinelibrary.wiley.com

worldcat.org (Global: 5th place; English: 5th place)

search.worldcat.org

archive.org (Global: 6^th place; English: 6^th place)

arxiv.org (Global: 69^th place; English: 59^th place)

doi.org (Global: 2^nd place; English: 2^nd place)

excite.com (Global: low place; English: 9,059^th place)

harvard.edu (Global: 18^th place; English: 17^th place)

iop.org (Global: 1,725^th place; English: 1,828^th place)

lyellcollection.org (Global: 6,584^th place; English: 4,241^st place)

nasa.gov (Global: 75^th place; English: 83^rd place)

nih.gov (Global: 4^th place; English: 4^th place)

pnas.org (Global: 1,293^rd place; English: 3,794^th place)

semanticscholar.org (Global: 11^th place; English: 8^th place)

springer.com (Global: 274^th place; English: 309^th place)

stratigraphy.org (Global: 2,562^nd place; English: 3,215^th place)

talkorigins.org (Global: 9,502^nd place; English: low place)

usgs.gov (Global: 167^th place; English: 198^th place)

washingtonpost.com (Global: 34^th place; English: 27^th place)

web.archive.org (Global: 1^st place; English: 1^st place)

wiley.com (Global: 222^nd place; English: 297^th place)

worldcat.org (Global: 5^th place; English: 5^th place)