These three eons form the Pre-Cambrian supereon.
Hadean, Archeozoic, Proterozoic, Phanerozoic
The Hadean, Archean, and the protozoic eons.
The Precambrian time, which includes the majority of Earth's history, began approximately 4.6 billion years ago with the formation of the Earth. This time period encompasses about 88% of geologic time and is divided into the Hadean, Archean, and Proterozoic eons.
The Hadean, Archean, and Proterozoic eons are considered distinct time periods in Earth's history primarily due to their significant geological and biological developments, rather than being divided into eras. These eons encompass vast spans of time characterized by fundamental changes in Earth's crust, atmosphere, and the emergence of early life. The later Phanerozoic eon, however, is divided into eras because it includes a more detailed fossil record and a greater variety of life forms, allowing for a finer resolution in geological time.
The eon after the Hadean Eon is the Archean Eon. During this eon, significant geological and biological events took place, leading to the development of early life forms on Earth.
Precambrian time is another name for the group of eons that includes the Hadean, Archean, and Proterozoic eons.
Hadean, Archeozoic, Proterozoic, Phanerozoic
The Precambrian Eon consists of three main eras: the Hadean, Archean, and Proterozoic eras.
The Precambrian era is divided into three subdivisions: the Hadean, Archean, and Proterozoic eons. These subdivisions represent different stages in Earth's early history, from the formation of the planet to the evolution of complex life forms.
Precambrian is an informal term for the time before the Cambrian Period, the first period of the Phanerozoic Eon. The Precambrian consists of three eons, the Hadean, the Archean, and the Proterozoic. The Hadean Eon is about 760,000,000 years long. The Archean Eon is about 1,300,000,000 years long. The Proterozoic Eon is about 1,960,000,000 years long This comes to a total of 4,025,000,000 years.
The Hadean, Archean, and the protozoic eons.
A geologic eon is a very large period of time, typically encompassing billions of years. Examples include the Hadean, Archean, and Proterozoic eons in the Earth's history.
Precambrian - It extends from 4.6 billion years ago to the beginning of the Cambrian Period (about 541 Ma). It includes three eons, the Hadean, Archean, and Proterozoic.
The Precambrian time, which includes the majority of Earth's history, began approximately 4.6 billion years ago with the formation of the Earth. This time period encompasses about 88% of geologic time and is divided into the Hadean, Archean, and Proterozoic eons.
The Hadean, Archean, and Proterozoic eons are considered distinct time periods in Earth's history primarily due to their significant geological and biological developments, rather than being divided into eras. These eons encompass vast spans of time characterized by fundamental changes in Earth's crust, atmosphere, and the emergence of early life. The later Phanerozoic eon, however, is divided into eras because it includes a more detailed fossil record and a greater variety of life forms, allowing for a finer resolution in geological time.
The eon after the Hadean Eon is the Archean Eon. During this eon, significant geological and biological events took place, leading to the development of early life forms on Earth.
There are four eons dividing the geologic scale. Three occurred during the Precambrian era.