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What was much of earths first free oxygen combined with according to the Precambrian rock record?
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What is the geolgic significance of banded iron fomation?
It was laid down when earths oceans first acquired oxygen in the Precambrian
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
Early organisms in the Precambrian era converted to oxygen.?
Carbon dioxide
Oxygen combined with one other element is an?
Oxygen combined with one other element is an oxide.
Metal combined with oxygen is?
metallic oxide
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
According to the precambrian rock record much of earths first free oxygen combined with?
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.
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
