3 Stages Of Earth's Evolution
The first stage of Earth’s evolution was the precambrian stage, which is spread out into 3 eras. In order, they are the Hadean, Archean and Proterozoic eras. The Hadean Era lasted from when the Earth (and the rest of the solar system) formed 4,550 million years ago to around 3,800 million years ago. The simplest description for this era is Hades on Earth, because the earth at the time mainly consisted of liquid rock, almost endless volcano eruptions blowing our lava and boiling sulfur. The atmosphere wasn’t much better, since it mainly consisted of carbon dioxide, water vapor, dust, and little bits of nitrogen and sulfur compounds. Despite the chaos of raining meteors and molten rock everywhere, the earth formed its core during this era,
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The earth at this point has cooled down, everything is mostly solid instead of molten rock on the Earth’s surface, despite the surface of the earth still changing incredibly volatile. At this point, the Earth now had full oceans. This is the first time that the Earth has ever looked anything like it does today, with most of the carbon dioxide in the atmosphere converted to limestone or other rocks through chemical reactions, and the atmosphere now mostly consisting of nitrogen. The lava on Earth’s surface had solidified to form the ocean floor. There are now very small continents. 50 million years earlier, the Earth’s first life formed, and 50 million years later bacteria began to diversify (at the beginning of the era), and around 3,700 million years ago, bacteria began using photosynthesis, which directly caused the red earth stage of earth with newly formed oxygen reacting with iron across the world. This oxygen created many, many new minerals, allowing life to take advantage of many more rocks, and we breathe oxygen formed from microbes and other life forms producing oxygen through photosynthesis. Around 2,600 million years ago, bacteria have now gotten on land. These ancient microbes tell modern scientists there was most likely an ozone layer at this point in time, so life becoming much more diverse in the next era makes sense since the life forms are now protected from some of the sun’s dangerous radiation on the
The earth at this point has cooled down, everything is mostly solid instead of molten rock on the Earth’s surface, despite the surface of the earth still changing incredibly volatile. At this point, the Earth now had full oceans. This is the first time that the Earth has ever looked anything like it does today, with most of the carbon dioxide in the atmosphere converted to limestone or other rocks through chemical reactions, and the atmosphere now mostly consisting of nitrogen. The lava on Earth’s surface had solidified to form the ocean floor. There are now very small continents. 50 million years earlier, the Earth’s first life formed, and 50 million years later bacteria began to diversify (at the beginning of the era), and around 3,700 million years ago, bacteria began using photosynthesis, which directly caused the red earth stage of earth with newly formed oxygen reacting with iron across the world. This oxygen created many, many new minerals, allowing life to take advantage of many more rocks, and we breathe oxygen formed from microbes and other life forms producing oxygen through photosynthesis. Around 2,600 million years ago, bacteria have now gotten on land. These ancient microbes tell modern scientists there was most likely an ozone layer at this point in time, so life becoming much more diverse in the next era makes sense since the life forms are now protected from some of the sun’s dangerous radiation on the