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The Precambrian is the informal name for the large expanse of time preceding the current Phanerozoic Eon. It began with the Earth's formation about 4.5 billion years ago and lasted until the advent of multicellular life about 542 million years ago. Overall the planetary environment was drastically different. Life appeared sometime late in the Precambrian, but it is not known when.
The Precambrian "supereon" is divided into three eons: the Hadean, Archaean, and Proterozoic.
Very little is known about the Precambrian, despite the fact that it comprises nearly 90% of the Earth's history. This is simply because Precambrian rocks are so old, and are either heavily metamorphosed, have been destroyed by erosion, or remain buried deep beneath Phanerozoic strata.
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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.
What fossil records do you have from the Precambrian life?
very little, there are stromatolites, domed mates of microscopic algae that are aged as precambrian. No other fossils in the precambrian
Can carbon 14 be used in dating organic substances from precambrian time?
no. 50,000 years is the upper limit for using it for dating.
For which segment of the Earth's geologic history are fossils rarely found?
precambrian
What geological period has fossils of the most primitive life forms?
20,000 b.c.
When did Precambrian Time begin?
The Precambrian period was from 4600 million years ago to about 542 million years ago.
When did the precambrian era begin?
The Precambrian Era began in the time period 4600 and ended in 570.
How did precambrian time begin?
it began from the formation of the earth. earth started as a ball of fire
What was the longest segment of the earth's history?
It was the Precambrian time period.
When did plant life begin?
It began around the Precambrian period.
What does the precambrian era begin with?
The Precambrian era begins with the formation of Earth around 4.6 billion years ago. It is the longest geological time period, spanning from the formation of Earth to the beginning of the Paleozoic era about 541 million years ago.
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.
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 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.
Which is the largest of time on the geologic time scale?
The Precambrian
geologic time with poorest fossil record?
Precambrian time.
What time spans occurred first?
Precambrian
