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According to the precambrian rock record much of earths first free oxygen combined with?
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∙ 9y ago
Earth was formed somehwat less than 4.6 billion years ago. The Cambrian Era begins around 542 million years ago. Subtracting these times provides for a PreCambrian Era of around 4 billion years in length. This time period makes up around 87% of Earth's total history.
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∙ 9y ago
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Is Precambrian cyanobacteria need oxygen?
no
Which early Precambrian era converted to oxygen?
carbon dioxide
How did oxygen get in your atmosphere?
Oxygen was released from Precambrian rocks. cynobacteria were the first organisms to produce oxygen 2.5-3 billion years ago
What effects does oxygen have on metals?
Oxygen on metals may have many different effects depending on the metal and what the oxygen is combined with. Oxygen combined with moisture on the metal of steel or iron will cause the metal to rust.
Was there oxygen in the early earths atmosphere?
yes
According to the precambrian rock record much of earth's first free oxygen combined with what?
Iron
What gas was lacking from earths early atmosphere in the early precambrian?
oxygen
What was the biggest change in the earths atmosphere between the precambrian and the paleozoic eras?
The origin of free oxygen
How did earths atmosphere change during precambrian time?
The amount of oxygen increased greatly
What is the geolgic significance of banded iron fomation?
It was laid down when earths oceans first acquired oxygen in the Precambrian
How did earths atsmophere change during the precambrian time?
It changed from a reducing atmosphere containing no free oxygen to an atmosphere containing oxygen. The evolution of life on Earth "terraformed" the planet.
Atmosphere gases in the precambrian?
What evidence shows that the Precambrian atmosphere did not contain oxygen?
What is precambrian order?
85% of earths history and the earliest era that exists. bacteria mostly survived then and built up oxygen until a mass extinction.The. Era had many extinctions because of large variations in climate is what mesozoicor cenozoic or precambrian which one
What did Precambrian do?
ANSWER:They produced oxygen
Is Precambrian cyanobacteria need oxygen?
no
The Precambrian era converted what to oxygen?
Carbon Dioxide
Which gas did volcanoes not produce in the Precambrian era?
Oxygen
