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.)
The 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.
The first Era was the Cryptic Era, during the Hadean Eon.
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the premcambrian era.
precambrian
The scale outlines the development of Earth and life on Earth.
a span of life (life span) is how long an organism (a living thing) can live.
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.
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 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.
Genesis, according to the Judao/Christian holy books.
The beginning of recorded Greek history was as early as 776 BC
because the time span of earth past is so great geologic
"Paleo" refers to a time span in Earth's history while "Mississippian" refers to an area of land on the Earth.
Most of Earth's history has occurred in the Precambrian Era, a time span of over 4 billion years.
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'
Humans span roughly 0.0044% (about 4 thousandths of one precent) of the time since the Earth was formed.
The Archean era represents a large span of time on Earth in whose fossils very little variety exists.
4.6 billion years
Earth's history is divided into eras.
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.
4.6 billion years