Quick Answer: What Are The 4 Eras In Order?

What are the 5 eras?

The book divides the timeline of the universe into five eras: the primordial Era, the Stelliferous Era, the Degenerate Era, the Black Hole Era and the Dark Era.

In addition to explaining current cosmological theory, the authors speculate on what kinds of life might exist in future eras of the universe..

Which era do we live in?

CenozoicOur current era is the Cenozoic, which is itself broken down into three periods. We live in the most recent period, the Quaternary, which is then broken down into two epochs: the current Holocene, and the previous Pleistocene, which ended 11,700 years ago.

What is the current era?

Earth’s geological history over the past 4.5 billion years is divided up into various units including eons, eras, periods, epochs, and ages. Scientists have just assigned three new ages to the Holocene, which is the current epoch in which we live.

What is the longest part of Earth’s history?

Earth Science Chapter 14 – History of the EarthABPrecambrian TimeLongest part of Earth’s history, starting at 4.0 billion yearsCyanobacteriaPhotosynthetic bacteria thought to be one of Earth’s earliest life-formsPaleozoic EraWhen organisms developed hard parts and ended with mass extinctions12 more rows

How many years are in an era?

An era in geology is a time of several hundred million years. It describes a long series of rock strata which geologists decide should be given a name. An example is the Mesozoic era, when dinosaurs lived on the Earth. An era is made up of periods, and several eras make up an eon.

What are the eras in order?

List of geological eras in Earth’s historyEonEraTime frame (Ma = million years ago)PhanerozoicCenozoic66 million years ago to presentMesozoic251.902 to 66 million years agoPaleozoic541 to 251.902 million years agoProterozoicNeoproterozoic1,000 to 541 million years ago7 more rows

What are the 4 major divisions of geologic time?

Geologic Time Scale: Major Eons, Eras, Periods and Epochs.

Which era is longest?

PrecambrianThe longest geologic era was the Precambrian. It began with the formation of the earth about 4.53 billion years ago, and ended about 542 million years…

Which is the shortest era?

Phanerozoic EonThe Quaternary spans from 2.58 million years ago to present day, and is the shortest geological period in the Phanerozoic Eon. It features modern animals, and dramatic changes in the climate. It is divided into two epochs: the Pleistocene and the Holocene.

What was before Jurassic period?

The Jurassic Period was the second segment of the Mesozoic Era. It occurred from 199.6 to 145.5 million years ago, following the Triassic Period and preceding the Cretaceous Period. During the Jurassic Period, the supercontinent Pangaea split apart.

What was the first era of the universe?

Primordial eraThe Primordial era This is where the universe begins, though what came before it and where it came from are certainly still up for discussion. It begins at the Big Bang about 13.8 billion years ago.

What is the next era called?

The next-larger division of geologic time is the eon.

What are the four eras in order from oldest to youngest?

1 Answer. The four main ERAS are, from oldest to youngest: PreCambrian, Palaeozoic, Mesozoic and Cenozoic.