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The Precambrian period really doesn't have an upper boundary. When the earth was made it was too hot to keep a crust.
The Hadean basically started with the sun exploding.
The formation of the oldest rock stared the Archean era as we know it. The fossils of visible life ended it.
What else can I help you with?
Historians know least about era do?
**Precambrian**
When was the Founding Era?
the Precambrian era
What are two subdivisions of the Precambrian Era called?
The two subdivisions of the Precambrian Era are the Hadean and the Archean Eons.
There was no life on land during this era?
Precambrian Era
Did the precambrian era occur first?
Yes. The first era was the precambrian era followed by the paleozoic era then the mesozoic era than the Cenozoic era.
What are the chracteristics of the geological era and the definition of precambrian Cenozoic mesozoic and paleozoic?
Precambrian
What era featured the longest periods with no life forms on Earth.?
Precambrian
What fossils are from the Precambrian era?
Stromatolites
What era is furthest in the past?
Precambrian !!!
What era is when life begins?
Precambrian
When did the precambrian era begin?
The Precambrian Era began in the time period 4600 and ended in 570.
Which describes the correct order of the geologic time scale from oldest to most recent?
ok im going to start off by saying this, the last answerer is stupid, and doesnt know what he is talking about. it goes from: PERIOD ERA EPOCH there you go ;)
