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A very interesting question. Not a place where we could live, according to this extract from Wikipedia:
http://en.wikipedia.org/wiki/Precambrian
"The atmosphere of the early Earth is poorly known, but it is thought to have been smothered in reducing gases, containing very little free oxygen. The young planet had a reddish tint, and its seas were thought to be olive green. Many materials with insoluble oxides appear to have been present in the oceans for hundreds of millions of years after the Earth's formation.
When evolving life forms developed photosynthesis, oxygen began to be produced in large quantities, causing an ecological crisis sometimes called the Oxygen Catastrophe. The oxygen was immediately tied up in chemical reactions, primarily with iron, until the supply of oxidizable surfaces ran out. After that the modern high-oxygen atmosphere developed. Older rocks contain massive banded iron formations that were apparently laid down as iron and oxygen first combined."
There is more information if you follow the link
andrea
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∙ 12y ago
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Is the Precambrian time the longest or shortest part of Earth's history?
The Precambrian time period is the longest time period of Earth's history.Looks like we have the same worksheet in school :)
What did earth look like during the precambrian time?
It looked like a sphere
Why is it difficult to study Precambrian time?
There is not many remains of the Precambrian time
What did Earth look like during the Precambrian time period?
It looked like a sphere
Is the Earth's surface hot or cool in the Precambrian Time?
It is hot in the Precambrian time
What was the longest segment of the earth's history?
It was the Precambrian time period.
What animals existed during the Precambrian Time?
jellyfish-like animals, sea pen, and bacteria.
Why is the shield also referred to as the Precambrian Shield?
Because it was created in the precambrian era...The Candadian Shield was formed in the Precambrian Era.The rocks of the Canadian Shield formed during the Precambrian time.
What happened during the Precambrian time?
Over most of Precambrian time 80 percent of earths history-the only life forms are bacteria ,which appear about 3,500 million years ago. multiple-cells marine animals like spriggina appear at the end of the era
Why is the Canadian Shield also referred as the Precambrian Shield?
Because it was created in the precambrian era...The Candadian Shield was formed in the Precambrian Era.The rocks of the Canadian Shield formed during the Precambrian time.
Why is the Canadian Shield also referred to as the Precambrian Shield?
Because it was created in the precambrian era...The Candadian Shield was formed in the Precambrian Era.The rocks of the Canadian Shield formed during the Precambrian time.
Why is the Precambrian time period segmented into very few parts?
The Precambrian time period is segmented into very few parts because:
