Over vast periods of time, our primitive ocean formed. Water remained a gas until the Earth cooled below 212 degrees Fahrenheit. At this time, about 3.8 billion years ago, the water condensed into rain which filled the basins that we now know as our world ocean.
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The ocean formed from the escape of water vapor and other gases from the molten rocks of the Earth to the atmosphere surrounding the cooling planet.
After the Earth's surface had cooled to a temperature below the boiling point of water, rain began to fall—and continued to fall for centuries. As the water drained into the great hollows in the Earth's surface, the primeval ocean came into existence. The forces of gravity prevented the water from leaving the planet.
scientists began comparing Earth’s water with the water in carbonaceous chondrites. The key is hydrogen, the most abundant element in the universe. Hydrogen has two isotopes—normal hydrogen, with a mass of one, and deuterium or “heavy hydrogen,” with a mass of two. The ratio of these isotopes differs in different parts of the solar system. The sun is made mostly of normal hydrogen. But comets, made mostly of rock and ice, formed much farther from the sun and are richer in deuterium. The hydrogen in Earth’s water is somewhere in between the sun and comets.
Measurements of hydrogen isotopes in carbonaceous chondrites matched very well with Earth’s water. That gave credence to the idea that Earth’s water came from chondrites. But when did this occur? The problem was that chondrites could have brought in water early, slamming into the growing planet, or late, pelting Earth after it formed. To know, scientists needed to find water in rocks that formed very early on, in the same region and time as Earth.
A promising source was a type of rock called eucrites. These are pieces of the asteroid Vesta that have fallen to Earth in the form of meteorites.
“Vesta completely froze and locked up about 14 million years after the start of the solar system, so it got all its water before then,” Sarafian said. “At the time, the Earth was one-quarter to one-half its size and still growing.”
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Water is stored in various reservoirs as it moves through this cycle. The largest, by far, is the oceans, accounting for 97% of the volume (Figure 5.2.2). Of course, that water is salty. The remaining 3% is fresh water. Two-thirds of our fresh water is stored in the ground and one-third is stored in ice. The remaining fresh water — about 0.03% of the total — is stored in lakes, streams, vegetation, and the atmosphere.
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the proportion of Earth’s water that is in the atmosphere is tiny, the actual volume is huge. At any given time, there is the equivalent of approximately 13,000 km3 of water in the air in the form of water vapor and water droplets in clouds. Water is evaporated from the oceans, vegetation, and lakes at a rate of 1,580 km3 per day, and just about exactly the same volume falls as rain and snow every day, over both the oceans and land. The precipitation that falls on land goes back to the ocean in the form of stream flow (117 km3/day) and groundwater flow (6 km3/day).
So thats the origin of the Oceans and why we have large amounts of it and btw if the ocean happened cause the flood explain why God wold dry up Mesopotamia but not the whole worlds water. Also what civilizations of ancient human species from billions or thousands of years ago was discovered in the Ocean provide sources. Also how is this belief coherent with Pangaea
the mass Earthquakes. Also ever heard of fossils?
Sources for this:
5.2 Origin of the Oceans – Introduction to Oceanography
What Is Pangaea? Theory and Facts About the Supercontinent | Live Science
https://pubs.usgs.gov/gip/dynamic/historical.html
The Geological Society
Why do we have an ocean?.
How Did Earth Get Its Ocean?