• PRECAMBRIAN EON (noun)
The noun PRECAMBRIAN EON has 1 sense:
1. the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago
Familiarity information: PRECAMBRIAN EON used as a noun is very rare.
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These three eons form the Pre-Cambrian supereon.
Supereon is the longest classification of time in geology. The Precambrian period is a supereon comprised of the Hadean, Archean, and Proterazoic eons.
The Hadean, Archean, and the protozoic eons.
The Precambrian era spans from about 4.6 billion years ago to 541 million years ago, encompassing almost 90% of Earth's history. It is divided into three eons: the Hadean, Archean, and Proterozoic eons.
There are four eons dividing the geologic scale. Three occurred during the Precambrian era.
These three eons form the Pre-Cambrian supereon.
supereon, composed of multiple eons
The Precambrian Eon consists of three main eras: the Hadean, Archean, and Proterozoic eras.
The Precambrian is the largest span of time in Earth's history before the current Phanerozoic Eon, and is a Supereon divided into several eons of the geologic time scale. It spans from the formation of Earth about 4.6 billion years ago (Ga) to the beginning of the Cambrian Period, about 541.0 ± 1.0 million years ago (Ma), when hard-shelled creatures first appeared in abundance.
Supereon is the longest classification of time in geology. The Precambrian period is a supereon comprised of the Hadean, Archean, and Proterazoic eons.
The Hadean, Archean, and the protozoic eons.
Precambrian time is another name for the group of eons that includes the Hadean, Archean, and Proterozoic eons.
The Precambrian era spans from about 4.6 billion years ago to 541 million years ago, encompassing almost 90% of Earth's history. It is divided into three eons: the Hadean, Archean, and Proterozoic eons.
The two subdivisions of the Precambrian Era are the Hadean and the Archean Eons.
There are four eons dividing the geologic scale. Three occurred during the Precambrian era.
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 time spans from about 4.6 billion years ago to around 541 million years ago. It represents roughly 90% of Earth's history and is divided into three eons: Hadean, Archean, and Proterozoic.