When was the Devonian? What are the features:

Devonian. It refers to the 60 million years between 100 million years ago and 100 million years ago. From the Devonian period, the land area of the Earth expanded, thanks to active crustal movements.

It was also from this time that the land was no longer a barren land lacking life, and with the expansion of the land area, plants adapted to the land environment began to grow in large numbers, as well as many huge ancient insects and amphibians that had just come ashore.

However, this is only the beginning of terrestrial life, and it is marine life that flourishes the most.

Especially fish. In the Devonian period, fish were all over the ocean, and they were the masters of the ocean at that time, so the Devonian period is also called the "Age of Fishes".

Devonian continental map.

The most abundant fish in the Devonian period was the shield fish, and the dominant marine fish at that time was the Dunkle fish, which belonged to the shield fish.

The Dunkle fish has a super bite force and can bite a shark in half in one bite, so it stands on the food chain of the time.

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The ferocious Dunkle was the overlord of the seas of the Devonian period.

The second mass extinction event in the history of the earth occurred in the late Devonian, resulting in the extinction of 75% of all living things at that time, and the marine life was the hardest hit area.

Imagination of the early Devonian mass extinction.

The above content refers to Milley's children's book "A Brief History of Life".

The Paleozoic era belongs to the Phanerozoic, the previous era was the Neoproterozoic, and the next generation was the Mesozoic. The Paleozoic era includes the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian. The Devonian, Carboniferous, and Permian are also known as the Late Paleozoic.

x0d Paleozoic Era – the third generation of geological time (the first generation is Archean and Proterozoic).It began about 100 million years ago and ended 100 million years ago. There are 6 periods in the Paleozoic Era, which are generally divided into Early and Late Paleozoic.

The Early Paleozoic Era included the Cambrian (100 million years ago), Ordovician (500 million years ago) and Silurian (100 million years ago), and the Late Paleozoic included the Devonian (Devonian 100 million years ago), Carboniferous (100 million years ago) and Permian (Permian 100 million years ago).The fauna is most abundant among marine invertebrates, trilobites, molluscs and echinoderms. In the Ordovician, Silurian period, Devonian and Carboniferous periods, lower fishes, paleoamphibians and paleoreptiles appeared one after another.

Fish reached their peak in the Devonian. Carboniferous and Permian insects and amphibians flourished. In the early Paleozoic, marine algae were the main species of ancient plants, and by the end of the Silurian period, primitive plants began to land on land.

The Devonian was dominated by gymnoferns. During the Carboniferous and Permian periods, ferns flourished in particular, forming dense forests, which were important coal-forming periods. x0d Mesozoic (English name:

The Devonian is the fourth epoch in the Paleozoic era of geological epochs, and the Devonian belongs to the Phanerozoic Paleozoic era, which began at isotopic age 416 and ended in. In the late Devonian, amphibians appeared.

From the Devonian period, the Hercynian movement began again. As a result, during the Devonian, many areas rose and exposed the sea to become land, and the paleogeography changed greatly compared to the early Paleozoic. In the Devonian period, ferns flourished, and insects and amphibians arose.

The Devonian and Carboniferous periods were separated by a mass extinction – the supermantle plume. In this mass extinction, 75% of species are extinct. It is the second most extinct mass extinction, after the first most extinct Permian mass extinction, the Siberian Dark Rock Event.

The main extinct animals are: shield fish, Attenborough female. Vertebrates entered a period of rapid development, the number and variety of ichthyomorphs increased, and the modern fish, the bony fish, began to develop.

The Devonian period is often referred to as the "Age of Fishes".

The Devonian is the fourth epoch in the Paleozoic era of geological epochs.

The Devonian belongs to the Phanerozoic Paleozoic, the early Devonian naked ferns flourished, after the middle period, brachiopods and corals developed, primitive ammonites and insects appeared, late primitive amphibians and mazes appeared, ferns and primitive gymnosperms appeared; Jawless species tend to become extinct.

From the Devonian period, the Hercynian movement began again. Therefore, during the Devonian, many areas rose up, exposed the sea and became land, vertebrates entered a period of rapid development, and the number and variety of ichthyomorphs increased, and the Devonian period is often called the "Age of Fishes".

In September 2022, Australian researchers discovered a 100-million-year-old heart on an ancient jawed fish fossil from the Rolling Eggplant Devonian period between 100 million and 100 million years ago – the oldest heart ever discovered.

Relevant period

1. Carboniferous.

Dating from 286 million to 360 million years ago, it can be divided into two periods: the First Carboniferous and the Later Shijingbei Liangtan. Large-scale forests appeared on the continent, creating favorable conditions for the formation of coal.

2. Permian.

The Permian period began about 100 million years ago and extended to 100 million years, a total of 45 million years. The further expansion of land area, the shrinking of the ocean range, and the change of the brightness and width of the natural geographical environment have promoted the important evolution of the biological world, heralding the arrival of a new period in the history of biological development.

Silurian period. Geological chronology.

The Quaternary - Holocene - 10,000 years ago.

The Quaternary - Pleistocene - 2.5 million years ago.

The Tertiary lead - Pliocene - 12 million years ago.

The Tertiary - Miocene - 25 million years ago.

The Tertiary - Oligocene - 40 million years ago.

The Tertiary period - Eocene - 60 million years ago.

Cenozoic - Tertiary - Paleocene - 67 million years ago.

Cretaceous - 100 million years ago.

Jurassic - 100 million years ago.

Mesozoic Era - Triassic - 100 million years ago.

Permian - 100 million years ago.

Carboniferous - 100 million years ago.

Devonian number of travel period - 100 million years from Huaibi stove.

Silurian - 100 million years ago.

Ordovician - 100 million years ago.

Paleozoic - Cambrian - 100 million years ago.

Proterozoic - Aurora - 100 million years ago.

Archean 5 billion years ago.

Paleozoic. Precambrian: 600-564

Cambrian Period: 564-535 Middle: 535-515 Late: Zhouxiang 515-500

Ordovician 500—436

Lao Liuxian 436—409

Devonian Period: 409-389 Middle Period: 389-378 Late Period: 378-360

Carboniferous Early: 360-335 Late: 335-284 Permian 284-250

Mesozoic. Triassic Early Period: 242-237 Middle Period: 237-229 Late Period: 229-208

Jurassic Early-Middle: 208-159 Late: Sorift 159-140 Cretaceous Early: 140-94 Late: 94-64

The Devonian period (100 million years ago) is the first epoch of the Late Paleozoic Era, which began 400 million years ago and lasted for 40 million years.

It was a period of great changes in the earth's biological world, and the large-scale march from the sea to the land was the most prominent and important biological evolution event in this period.