Geobiologist Preston Cloud was an eminent geobiologist and
paleontologist, who contributed important observations and
interpretations that led to greater understanding of the evolution
of the atmosphere, oceans, and crust of the Earth and,
most important, to understanding the evolution of life on the
planet. Preston Cloud was educated at Yale University and
received his Ph.D. in 1940 for a study of Paleozoic brachiopods.
From there, he moved to Missouri School of Mines
in Rolla, but then returned to Yale University. In 1965 Cloud
moved to the University of California, Los Angeles, then in
1968 he moved to the Santa Barbara campus. In 1979 Cloud
retired, but he remained active in publishing books on life on
the planet and was also active on campus. Preston Cloud
emphasized complex interrelationships between biological,
chemical, and physical processes throughout Earth history. His
work expanded beyond the realm of rocks and fossils, and he
wrote about the limits of the planet for sustaining the exploding
human population, and he recognized that limited material,
food, and energy resources with the expanding activities of
humans could lead the planet into disaster. Preston Cloud was
elected a member of the Academy of Sciences and was an
active member for 30 years. The Preston Cloud Laboratory at
the University of California, Santa Barbara, is dedicated to the
study of pre-Phanerozoic life on Earth.














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