Formation of Planet Earth
4.54 Billion years ago · Prehistoric
Approximately 4.54 billion years ago, Earth formed through accretion of cosmic material in the solar nebula. Gravitational collapse caused dust and gas to coalesce into a spherical protoplanet. Heavier elements like iron and nickel sank to form the core, while lighter materials remained near the surface. This process generated heat from gravitational compression, radioactive decay, and impacts. Early Earth was likely covered in magma oceans with an atmosphere of hydrogen, water vapor, and gases released through volcanic outgassing.
Key Figures
Clair Cameron PattersonHarrison BrownMark Inghram
Locations
Meteor CraterArgonne National LaboratorySolar Nebula
Topics
cosmologysciencespace
Connected Events — 11 Connections
Earth's formation and subsequent tectonic evolution produced the plate movements that drove India northward into Eurasia India-Eurasia Collision Begins Closing the Neo-Tethys Ocean
Earth's tectonic evolution drove the rifting that separated Antarctica from South America Drake Passage Opens
Earth's tectonic processes drove the Iapetus Ocean closure and continental collisions Caledonian Orogeny
Earth's tectonic processes produced the plate subduction that created the Western Interior Seaway and isolated Laramidia Laramidia Emerges as Island Continent
Earth's tectonic processes led to the formation and closure of the Rheic Ocean Closure of the Rheic Ocean
Earth's tectonic processes created the subduction zone forming the Caribbean volcanic arc Formation of the Caribbean Volcanic Arc
Wilson's theory explains how Earth's tectonic processes cycle ocean basins through opening and closing J. Tuzo Wilson Proposes Plate Tectonic Cycle
Alexander's inheritance of the Macedonian crown and Philip's military machine made possible the decisive defeat of the Persian Empire, ending centuries of East-West conflict and opening Asia to Hellenistic influence Alexander the Great becomes King
Earth's iron-rich core began differentiating during planetary formation, creating the liquid outer core whose convection currents eventually generated the magnetic dynamo Earth's Core Dynamo Generates a Sustained Magnetic Field
Plate tectonics began approximately 1.3 billion years after Earth's formation, as the planet cooled sufficiently for the lithosphere to fracture into rigid plates Onset of Plate Tectonics on Earth
Volcanic outgassing from Earth's cooling interior released the water vapor and CO₂ that formed the secondary atmosphere and ocean Earth's Hadean Ocean Condenses from Volcanic Outgassing
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