Was There Land on the Early Earth?

The presence of exposed land on the early Earth is a prerequisite for a certain type of prebiotic chemical evolution in which the oscillating activity of water, driven by short-term, day–night, and seasonal cycles, facilitates the synthesis of proto-biopolymers. Exposed land is, however, not guarant...

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Auteur principal:	Jun Korenaga
Format:	article
Langue:	EN
Publié:	MDPI AG 2021
Sujets:	exposed land continents ocean islands wet–dry cycles Science Q
Accès en ligne:	https://doaj.org/article/8bc68b8590674521941fcdc9b0e5654a
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id	oai:doaj.org-article:8bc68b8590674521941fcdc9b0e5654a
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spelling	oai:doaj.org-article:8bc68b8590674521941fcdc9b0e5654a2021-11-25T18:10:36ZWas There Land on the Early Earth?10.3390/life111111422075-1729https://doaj.org/article/8bc68b8590674521941fcdc9b0e5654a2021-10-01T00:00:00Zhttps://www.mdpi.com/2075-1729/11/11/1142https://doaj.org/toc/2075-1729The presence of exposed land on the early Earth is a prerequisite for a certain type of prebiotic chemical evolution in which the oscillating activity of water, driven by short-term, day–night, and seasonal cycles, facilitates the synthesis of proto-biopolymers. Exposed land is, however, not guaranteed to exist on the early Earth, which is likely to have been drastically different from the modern Earth. This mini-review attempts to provide an up-to-date account on the possibility of exposed land on the early Earth by integrating recent geological and geophysical findings. Owing to the competing effects of the growing ocean and continents in the Hadean, a substantial expanse of the Earth’s surface (∼20% or more) could have been covered by exposed continents in the mid-Hadean. In contrast, exposed land may have been limited to isolated ocean islands in the late Hadean and early Archean. The importance of exposed land during the origins of life remains an open question.Jun KorenagaMDPI AGarticleexposed landcontinentsocean islandswet–dry cyclesScienceQENLife, Vol 11, Iss 1142, p 1142 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	exposed land continents ocean islands wet–dry cycles Science Q
spellingShingle	exposed land continents ocean islands wet–dry cycles Science Q Jun Korenaga Was There Land on the Early Earth?
description	The presence of exposed land on the early Earth is a prerequisite for a certain type of prebiotic chemical evolution in which the oscillating activity of water, driven by short-term, day–night, and seasonal cycles, facilitates the synthesis of proto-biopolymers. Exposed land is, however, not guaranteed to exist on the early Earth, which is likely to have been drastically different from the modern Earth. This mini-review attempts to provide an up-to-date account on the possibility of exposed land on the early Earth by integrating recent geological and geophysical findings. Owing to the competing effects of the growing ocean and continents in the Hadean, a substantial expanse of the Earth’s surface (∼20% or more) could have been covered by exposed continents in the mid-Hadean. In contrast, exposed land may have been limited to isolated ocean islands in the late Hadean and early Archean. The importance of exposed land during the origins of life remains an open question.
format	article
author	Jun Korenaga
author_facet	Jun Korenaga
author_sort	Jun Korenaga
title	Was There Land on the Early Earth?
title_short	Was There Land on the Early Earth?
title_full	Was There Land on the Early Earth?
title_fullStr	Was There Land on the Early Earth?
title_full_unstemmed	Was There Land on the Early Earth?
title_sort	was there land on the early earth?
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8bc68b8590674521941fcdc9b0e5654a
work_keys_str_mv	AT junkorenaga wastherelandontheearlyearth
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Was There Land on the Early Earth?

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