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there is bacteria... that's abot it.
Wiki User
∙ 12y ago
Some interesting things about the Precambrian time period include:
- The formation of the Earth's oldest known rocks, which date back to about 4 billion years ago.
- The development of early life forms such as bacteria and blue-green algae, which were responsible for the oxygenation of the Earth's atmosphere.
- The occurrence of significant geological events, such as the formation of supercontinents (e.g., Rodinia) and the occurrence of multiple global ice ages.
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When did Precambrian Time begin?
The Precambrian period was from 4600 million years ago to about 542 million years ago.
How long did the PreCambrian era last?
The Precambrian Era. The name means: "before the Cambrian period." This old, but still common term was originally used to refer to the whole period of earth's history before the formation of the oldest rocks with recognizable fossils in them. In the last few decades, however, geologists have found that there are some hard-to-discern fossils in some Precambrian rocks, so this period is now also known as the Cryptozoic or "obscure life" Eon (from the words "crypt" = "hidden," and "zoon" = "life"). The Precambrian covers almost 90% of the entire history of the Earth. It has been divided into three eras: the Hadean, the Archean and the Proterozoic. Source: Unknown The Precambrian Era comprises all of geologic time prior to 600 million years ago. The Precambrian was originally defined as the era that predated the emergence of life in the Cambrian Period. It is now known, however, that life on Earth began by the early Archean and that fossilized organisms became more and more abundant throughout Precambrian time. The two major subdivisions of the last part of the Precambrian are the Archean (oldest) and the Proterozoic. Rocks younger than 600 Ma are considered part of the Phanerozoic.
What time spans occurred first?
Precambrian
What time period you would visit using a time machine?
The 1870's and 80's because of all the interesting things that happened in history during that era, (in Canada leastways) and the way of life seems very efficient.
What is the definition for historical period?
A historical period, or era as it's sometimes called, is a period of time that is readily identifiable by particular things, events and or persons that happened or existed during that time.
What was the longest segment of the earth's history?
It was the Precambrian time period.
Why is the Precambrian time period segmented into very few parts?
The Precambrian time period is segmented into very few parts because:
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 :)
Why is the precambrian time period segmented into very few parts because?
The Precambrian time period is segmented into very few parts because the fossil record is scarce.
Precambrian are fossils yes or no?
Precambrian is a geologic period that extends as back as 4.500 million years ago. Fossils are very rare from that period of time.
When did Precambrian Time begin?
The Precambrian period was from 4600 million years ago to about 542 million years ago.
What time period represents 88 percent of earths history?
The Precambrian Time
What time period began 4.6 billion years ago?
Precambrian time
When did the precambrian era begin?
The Precambrian Era began in the time period 4600 and ended in 570.
Which period of Earth's time would be considered the longest?
The period of Earth's time that would be considered longest is the Precambrian Era.
What geologic period lasted seven eighths of the earths history?
The Precambrian time
What is the time range of Precambrian Era?
Precambrian time - The period in the geologic time scale from the formation of the Earth to the beginning of the Palezonoic era, from about 4.6 billion to 543 million years ago.
