The Paleozoic Era lasted from about 540 million years ago to about 280 million years ago. It included the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian Periods.
The Proterozoic Eon, which lasted from about 2.5 billion to 541 million years ago, was the longest geologic time era. It was a time of significant biological and geological evolution, including the emergence of early multicellular life forms.
The Precambrian Super-Eon is the informal name for the time on earth before the Cambrian Period. It lasted from 4,576 millions years ago until 542 million years ago, about 4.034 billion years.No geological era lasted as long. The longest era was the Paleoproterozic Era(2,500 - 1,600Ma) which lasted 900 million years.
The longest epoch on the geological time scale is the Paleozoic Era, which lasted approximately 291 million years, from about 541 to 252 million years ago. It is characterized by significant geological, climatic, and biological developments, including the emergence of early life forms, the colonization of land by plants and animals, and the formation of extensive fossil fuel deposits. The Paleozoic Era is divided into several periods, including the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian.
The Cenozoic Era is the most recent geologic era and has lasted for around 65 million years, making it the longest era to date. During this era, mammals diversified and dominated the Earth's ecosystems.
Earth has gone through four major geological eras: the Precambrian, Paleozoic, Mesozoic, and Cenozoic. The longest era is the Precambrian, lasting nearly 4 billion years, while the shortest is the Mesozoic, which lasted about 180 million years. Each era is characterized by significant geological, climatic, and biological changes.
The longest era in geologic time is the Precambrian era, which lasted from about 4.6 billion years ago to 541 million years ago. It encompasses about 90% of Earth's history and is divided into several eons, including the Hadean, Archean, and Proterozoic.
The earliest era of prehistory was also the longest. The Stone Age lasted from around 25,000 years to ago to about 5,500 years ago.
Eon
The sequence of geological time that represents increasing lengths of time is: epoch, period, era, and eon. An epoch is the smallest unit, followed by a period, then an era, and finally an eon, which encompasses the longest spans of geological time. Each successive category includes multiple subdivisions of the previous one, reflecting a broader timeframe.
The Precambrian is actually the longest block (division) of time in earth geological history. But the Paleozoic era is the longest of the three "eras". The paleozoic era started about 550 million years ago and is marked by the appearance of abundant invertebrate life in the oceans. The paleozoic era ended about 225 million years ago with the forming of the supercontinent Pangaea.
False. The Paleozoic Era is not the longest time period in Earth's history; it lasted about 291 million years, from approximately 541 to 252 million years ago. The longest time period is the Precambrian, which encompasses the Hadean, Archean, and Proterozoic eons and spans roughly 4 billion years.
The Byzantine Empire lasted for a millennium.