0
The answer is debated amongst geologists, astrologists and palaeontologists - the earliest period in life's history is the Archean eon, when the first proto-cells were thought to have formed. The earliest period there, is the Eoarchean - 4200 - 4400 million years ago. However, the earliest eon is the Hadean, which encompasses the formation of the Earth as celestial body 4600 million years ago, up to 4200 million years ago. The earth was formed by accretion (gravitational attraction of smaller bodies, to form a central object of greater mass, thus attracting more smaller bodies, and so on), within 10 - 20 million years, so, other than describing this period of Earth's history as 'Proto-Earth', there isn't really a way of classifying even earlier stages, unless you are willing to look into the stages of accretion in forming planets. (The earliest stage would probably be a 'proto-planetary disk' stage, which was itself formed as a by-product of the formation of the sun, followed by a kilometre-wide planetisimal, and then a Mars sized 'embryo', growing progressively. In this sense, the Earth and the Sun are descended from the same Giant Molecular Cloud, or GMC.)
Alvah Stokes
Wiki User
∙ 12y agoThe Precambrian Period.
This period lasted from 4.5 billion to 542 million years ago and is split into two eons: Archean and Proterozoic.
Earth's geologic history is 900,000 times longer than our recorded history, which began only 5,000 years ago.
Wiki User
∙ 13y agoThe first Era was the Cryptic Era, during the Hadean Eon.
Wiki User
∙ 13y agono one can realy no for shor
Wiki User
∙ 13y agothe premcambrian era.
Wiki User
∙ 14y agoprecambrian
Add your answer:
Earn +20 pts
What is the purpose of the geologic time scale?
The scale outlines the development of Earth and life on Earth.
What is span of life?
a span of life (life span) is how long an organism (a living thing) can live.
Why are dogs considered man's best friend and no other animal in history?
Dogs have a history with man. From the earliest time dogs have been with man as companions and protectors. This goes back thousands of years making them man's best friend.
What is called the record of life forms and geologic events in earth's history?
the record of life forms and geologic events in earth's history is actually called the "Geologic time scale" fine sir. good day
Historical geologists divide the history of the earth into four unites of the time called?
Historical geologists divide the history of the earth into for units of time called Eras. The first one that began when the earth formed---- 4.6 billion years ago---- was called the Precambrian Time. The next--- after the PT--- was known as the Paleozoic Era. The third--- when dinos roamed--- was called the Mesozoic Era. The on we live in is called the Cenozoic era.
What is the name given to the earliest span of time in history?
Genesis, according to the Judao/Christian holy books.
What span of time did the worlds earliest civilizations exist?
The beginning of recorded Greek history was as early as 776 BC
Why is the geologic time scale used to show the Earth's history?
because the time span of earth past is so great geologic
How are paleo and Mississippian different?
"Paleo" refers to a time span in Earth's history while "Mississippian" refers to an area of land on the Earth.
Which eon did most of earths history occur in?
Most of Earth's history has occurred in the Precambrian Era, a time span of over 4 billion years.
What has the author John William Abbott written?
John William Abbott has written: 'A history of London, from the earliest period to the present time' -- subject(s): History 'A history of London from the earliest period'
What percentage of geologic time do humans span?
Humans span roughly 0.0044% (about 4 thousandths of one precent) of the time since the Earth was formed.
What era represents a large span of time on earth in whose fossils very little variety exists?
The Archean era represents a large span of time on Earth in whose fossils very little variety exists.
Approximately how many years does the earth's geologic time span?
4.6 billion years
What is used to divide Earth's history into smaller pieces of time?
Earth's history is divided into eras.
What time span does archaeology cover?
Archaeology covers the study of human history from the emergence of our earliest ancestors to recent times, typically up to about 12,000 years ago. This includes the study of artifacts, structures, and other physical remains left behind by ancient civilizations.
Approximately how many years does the Earth's geologic time scale span?
4.6 billion years
