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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."
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How was the environment like in Precambrian era?
The environment during the Precambrian era was very different from today. There were no complex life forms, and the atmosphere had high levels of carbon dioxide. The land was barren, and the oceans were dominated by simple organisms like bacteria and algae.
What did earth look like during the precambrian time?
It looked like a sphere
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.
Which is the largest of time on the geologic time scale?
The Precambrian
Is the Precambrian time the longest or shortest part of Earth's history?
The Precambrian time is the longest part of Earth's history, spanning from the formation of Earth around 4.6 billion years ago to about 541 million years ago. It makes up about 88% of Earth's history.
What type of organisms dominated life during Precambrian time?
Simple organisms like bacteria, algae, and some protozoa dominated life during the Precambrian time. These were mostly single-celled and lacked complex structures like tissues or organs.
geologic time with poorest fossil record?
Precambrian time.
