Preston Ercelle Cloud Jr., known as Preston Cloud, was an American earth scientist, biogeologist, cosmologist and paleontologist who lived from 1912 to 1991 and spent his career at Harvard University and the University of California, Santa Barbara. He was the first scientist to systematically recognize the importance of the rich Cambrian fossil record in evolutionary terms, coining the term eruptive evolution in 1948 to describe how adaptive radiation in a favorable ecological setting could drive diversification from an original population. His work through the 1960s and 1970s on mineralogical differences in sedimentary rocks and on banded iron formations led him to propose the Great Oxidation Event, the pivotal turning point when the oceans and atmosphere of the Earth first became enriched in molecular oxygen. He also named the Hadean eon and authored more than two hundred scientific publications for both academic and general audiences. He received the Penrose Medal in 1976.
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Birth YearSourced to the subject's own account Birth DateSourced to the subject's own account Death DateSourced to the subject's own account Death YearSourced to the subject's own account FieldSourced to the subject's own accountBiogeology and physical cosmology 1 Death PlaceSourced to the subject's own accountSanta Barbara, California 1 NationalitySourced to the subject's own account Notable WorkSourced to the subject's own accountProposed the Great Oxidation Event, the turning point when Earth's oceans and atmosphere first became enriched in molecular oxygen 1 BirthplaceSourced to the subject's own accountWest Upton, Massachusetts 1 Field
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Source Preston Cloud (Wikipedia)Lead paragraph of the cited Wikipedia articletier 3Quote, Lead paragraph of the cited Wikipedia article
Preston Ercelle Cloud, Jr. (September 26, 1912 – January 16, 1991) was an American earth scientist, biogeologist, cosmologist, and paleontologist.
Sources
1. Preston Cloud (Wikipedia)
Wikipedialead paragraph
Preston Ercelle Cloud, Jr. (September 26, 1912 - January 16, 1991) was an American earth scientist, biogeologist, cosmologist, and paleontologist.
Early life and education section
Cloud was born in West Upton, Massachusetts.
infobox, death_place field
death_place = Santa Barbara, California
infobox, field field
field = Biogeology, Physical cosmology
lead paragraph, Great Oxidation Event sentence
led him to propose the now well-accepted concept of a turning point in Earth's history (now known as the Great Oxidation Event or GOE) in the beginning of the Proterozoic eon, during which Earth's oceans and atmosphere first became enriched in O2 (molecular oxygen), allowing the later emergence and radiation of complex multicellular life.
Works In: Paleontology, Lead sentence
Preston Ercelle Cloud, Jr. (September 26, 1912, January 16, 1991) was an American earth scientist, biogeologist, cosmologist, and paleontologist.
Works In: Cosmology, Lead sentence
Preston Ercelle Cloud, Jr. (September 26, 1912, January 16, 1991) was an American earth scientist, biogeologist, cosmologist, and paleontologist.
Member Of: National Academy of Sciences, Article text
Cloud was a member of the National Academy of Sciences for thirty years, he was chairman of th
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