The Cool early Earth (CEE) theory posits that the early planet Earth had a calm influx of bolides and a cool climate allowing fluid water, after the planetary accretion but before the occurrence of the Late Heavy Bombardment in the Hadean geological eon. The Cool Early Earth is believed to have been the state for some hundreds of million years around 4.2 billion years (Ga) ago. This Cool Early Earth theory is supported by supposed water conditions at the creation of detrital zircon at Jack Hills in Western Australia, dated to about 4.0–4.4 Ga ago, some time after the planetary accretion era of the early Hadean. The Cool Early Earth was immediately followed by the Late Heavy Bombardment.
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Famous quotes containing the words cool, early and/or earth:
“The cool blade
Severs between coolness, apple-rind
Compelling a recognition.”
—Charles Tomlinson (b. 1927)
“[My early stories] are the work of a living writer whom I know in a sense, but can never meet.”
—Elizabeth Bowen (1899–1973)
“[W]e must remember that so long as war exists on earth there will be some danger that even the Nation that most ardently desires peace may be drawn into war.”
—Franklin D. Roosevelt (1882–1945)