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Precambrian - Wikipedia The Precambrian is so named because it preceded the Cambrian, the first period of the Phanerozoic Eon, which is named after Cambria, the Latinized name for Wales, where rocks from this age were first studied The Precambrian accounts for 88% of the Earth's geologic time
Precambrian | Life, Climate, Facts | Britannica Precambrian, period of time extending from about 4 6 billion years ago (the point at which Earth began to form) to the beginning of the Cambrian Period, approximately 541 million years ago The Precambrian represents more than 80 percent of the total geologic record
Precambrian | Natural History Museum The Precambrian encompasses nearly 90% of the history of the Earth and around a third of the history of the Universe The Precambrian begins with the formation of the Solar System 4 57 billion years ago (bya) and extends to the beginning of the Cambrian 540 million years ago (Mya, or 0 54 bya)
The Precambrian - U. S. National Park Service Introduction The Precambrian was the "Age of Early Life " During the Precambrian, continents formed and our modern atmosphere developed, while early life evolved and flourished Soft-bodied creatures like worms and jellyfish lived in the world's oceans, but the land remained barren
Precambrian Era - Michigan State University 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
Get Precambrian Time Information and Prehistoric Facts Precambrian time covers the vast bulk of the Earth's history, starting with the planet's creation about 4 5 billion years ago and ending with the emergence of complex, multicelled life-forms
The Precambrian - University of California Museum of Paleontology Nearly 4 thousand million years passed after the Earth's inception before the first animals left their traces This stretch of time is called the Precambrian To speak of "the Precambrian" as a single unified time period is misleading, for it makes up roughly seven-eighths of the Earth's history
Precambrian Time - The Story of the Early Earth The Precambrian is the least-understood part of Earth history, yet it is arguably the most important Precambrian time spans almost nine-tenths of Earth history, from the formation of the Earth to the dawn of the Cambrian Period
Precambrian: what it was, characteristics and division The Precambrian is the earliest and longest time period in Earth's history It spanned approximately 3 96 billion years, ending about 540 million years ago with the beginning of the Phanerozoic Eon and its first era, the Paleozoic
Precambrian - Ancient Life, Fossils, Eons | Britannica Precambrian - Ancient Life, Fossils, Eons: Precambrian rocks were originally defined to predate the Cambrian Period and therefore all life, although the term Proterozoic was later coined from the Greek for “early life ”