answersLogoWhite

0


Want this question answered?

Be notified when an answer is posted

Add your answer:

Earn +20 pts
Q: What organisms were abundant during the Precambrian time?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about General History

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


When did Precambrian Time begin?

The Precambrian period was from 4600 million years ago to about 542 million years ago.


True or false the first era the precambria era lasted 4 billion year and was the longest era during that time the earth had no solid crust?

It is best to break down the question into smaller parts.1) The Precambrian was the 1st Era? (FALSE)The Precambrian was a super-eon not an era. It was the 1st of the 2 Super-Eons.The 1st named era was the Eoarchean Era (3,800 - 3600 Ma). This was during the Archean Eon (3,800 - 2,500 Ma). This was proceeded by the Hadean Eon (4,600 - 3,800) but no Eras from this time have been named. These were all in the Precambrian Super-Eon (4,600 - 542 Ma).2) The Precambrian was the longest Era? (FALSE)The longest era also occurred in the Precambrian. This was the Paleoproterozoic Era (2,500 - 1,600 Ma) which lasted 900 million years.3) The Precambrian lasted 4 billion years (TRUE)The Precambrian was the longer of the 2 super-eons. It lasted from 4,500 to 542 million years ago, some 3.96 billion years, compared to the current super-eon that has lasted a mere 542 million years.4) During the Precambrian the Earth had no solid crust (FALSE)The Earth is approximately 4,600 million years old. According to the latest theory 4,530 a Mars sized planet called theia hit the earth causing the crust to in part or totally melt (It also gave rise to the moon). Estimates suggest that over the next 30 million years the crust was able to solidify so when the Precambrian Super-Eon started the crust was solid. Certainly by 3,500 million years ago there was life. Fossilized stromatolites have been found at this time. There is no known life that can survive at the temperates necessary for molten rock so the crust must have cooled and solidified by this time.


What were the dangers in the precambrian time?

welll ya see there was lots of little critters walking around and ya know its funyn cus that is it! ha

Related questions

What type of organisms dominated life during Precambrian time?

multi-celled organisms


How many living organisms were alive during the precambrian time?

155.92yrs


Did the organisms during the precambrian time have hard body parts?

Nope! They had jelly-like body parts.


What did jellyfish eat during the precambrian time period?

Jellyfish were not even alive during the Precambrian era because only single-celled organisms lived.


What were the dominant organisms living in the vendian time period?

Metazoans were abundant during the Vendian Period.


What were organisms that lived doing Precambrian time?

Animals that lived during the Precambrian times were single celled animals such as stromatolites,(blue-green algae).The earliest forms of invertebrae animals were also in the Late Precambrian.


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 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.


Human beings were present on earth from the beginning of the precambrian?

Human beings did not appear on Earth until much later, during the Quaternary period, around 2.5 million years ago. The Precambrian era, which spans from about 4.6 billion to 541 million years ago, predates the existence of humans by a vast amount of time. Life during the Precambrian consisted mostly of single-celled organisms.


Did plants colonized dry land during the precambrian time?

yes


Cyanobacteria are as significant to this process today as they were during precambrian time?

hello there