What was the Silurian period?

The Silurian period is the third of the six main periods that make up the paleozoic era, the geological division of the time that extends about 542 million years ago 251 million years ago. The Silurian period itself began at the end of the Ordovice period, approximately 444 million years ago, until the beginning of the Devonian period, about 416 million years ago. Therefore, the Silurian period was a period of 28 million years. The recovery was fast, especially among the invertebrate fauna. The surface clams similar to brachiopods dominated and accounted for 80% of total species. Most trilobites have died in recent extinction and were in a decline in the whole Silurian.

The Silurian period and the Devonian period that came after it was an important time in fish development. The sea was dominated by fish and many species had a curious type of armor, which is not seen in any existing species. Vascular plants, ie plants capable of carrying nutrients through their tissues, first appeared on Earth during Silurian, although most of the plants were still non -vascular and only a fewto centimeters high. The first steps in the green surface of the Earth took place. These plants were not bearing seeds and probably did not grow too far from the water. They reproduced by spores and direct vegetative growth. The interior of the continents was huge, dry and dead. There were no real forests.

Although there have been preliminary animal raids on the ground, the Silurian period saw the first real walking biota on the ground, in the form of myriapoda, a subfylum, which includes Millipedes of the Centipede. This Podphyl first appeared during the Silurian period and remains one of the oldest, as it still exists.

eurypterids or water scorpion and for the first time fish without jaws spread to brackish and fresh water. The snail and nautiloids were common organisms. At the end of the Silurian period, there were small extinct events, including the Lau event caused by impact events or a climate change.