Earth's Hadean Ocean Condenses from Volcanic Outgassing
c. 4.41 Billion years ago · Prehistoric
Approximately 4.4 billion years ago, Earth cooled sufficiently for water vapor to condense into a global ocean. Intense volcanic outgassing from the still-molten interior released carbon dioxide, nitrogen, and water vapor, forming a secondary atmosphere after the primordial hydrogen-helium envelope was stripped by solar wind. As surface temperatures dropped below 373 K, water condensed into liquid. Oxygen isotope ratios in Jack Hills zircons from Western Australia provide the primary evidence, recording values that form only through interaction with liquid water. Earth transitioned from molten hellscape to water world within 150 million years of the Moon-forming impact.
Locations
Jack Hills
Topics
early EarthHadean Eonastrobiologyvolcanismoceans
Connected Events — 7 Connections
Volcanic outgassing from Earth's cooling interior released the water vapor and CO₂ that formed the secondary atmosphere and ocean Formation of Planet Earth
The ocean was the environment in which abiogenesis occurred approximately 900 million years later, providing the solvent, thermal gradients, and mineral surfaces necessary for prebiotic chemistry Earliest Evidence of Life on Earth
The Theia impact vaporized any earlier water and resurfaced the planet in magma; the Hadean ocean formed only after Earth re-cooled over the following 100-150 million years Moon-Forming Giant Impact
Jack Hills zircon oxygen isotope ratios provide the primary evidence that liquid water existed on Earth's surface by 4.4 billion years ago Formation of Earth's Oldest Known Minerals
The Late Heavy Bombardment delivered additional water via comets while partially vaporizing the existing ocean, though the ocean persisted through the bombardment Late Heavy Bombardment
The ocean provided the liquid medium in which organic compounds delivered by meteorites could dissolve, concentrate, and interact chemically Delivery of Organic Compounds via Meteorites
The entire universe briefly reached liquid water temperatures 10 million years after the Big Bang, but lacked substrates; Earth's ocean 9.4 billion years later was the first known instance of persistent liquid water on a rocky surface Cosmic Background Temperature Enters the Liquid Water Range
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