Introduction to the Ordovician Period

The Ordovician Period is an important geological era in the history of the earth. Its appearance marks the beginning of the Paleozoic Era. This article will introduce you to the geological time, biota, and geological events of the Ordovician period to help you better understand this period.

Geological Time

The Ordovician Period is the third geological period of the Paleozoic Era, about 485 million to 435 million years ago. Its name comes from the Ordovician Mountains in Sweden, and was first proposed by Swedish geologist Alexander Kiesling (Adam Sedgwick) in 1835. The Ordovician is divided into three stages: Lower, Middle, and Upper Ordovician, namely the Lower Ordovician, the Middle Ordovician, and the Upper Ordovician.

Biota

The Ordovician was a period of dramatic increase in biodiversity, and marine biota developed rapidly. During this period, many important biological groups appeared, such as trilobites, brachiopods, and seaweeds.

Trilobites are one of the most important biological groups in the Ordovician period. They are close relatives of insects and live in the ocean. Trilobites have a hard shell and usually have three segments, hence their name. They reached their peak in the Ordovician period, with large numbers and a wide variety of species, and became an important part of the marine ecosystem at that time.

Brachiopods are also a typical biological group of the Ordovician. They are a type of marine invertebrates named for their special appendage structures. Brachiopods flourished in the Ordovician, with a wide variety and large numbers, and had an important impact on the evolution of marine ecosystems.

In addition, the Ordovician seaweed was also very rich and diverse. Seaweed is a type of plant that lives in the ocean and plays an important role in the stability and energy cycle of marine ecosystems. There were many types and quantities of seaweed in the Ordovician, which played an important role in the balance of the marine ecosystem at that time.

Geological events

The Ordovician period was a period of frequent geological activities, and many important geological events occurred.

During the early Ordovician period, Earth's continents were still clustered together to form a supercontinent called Laurentia West Asia. Over time, Laurentia began to break apart, creating a series of rift valleys and ocean basins.

At the same time, the Ordovician was also a period of frequent volcanic activity. During this period, many volcanic eruptions resulted in the eruption of large amounts of volcanic rock, forming many volcanic islands and volcanic mountains.

In addition, a series of important geological events occurred during the Ordovician period, such as changes in sea level and the formation of sedimentary rocks. These geological events have had an important impact on the evolution of the earth and the evolution of living things.

End

In short, the Ordovician period is an important geological period in the history of the earth. Its geological time, biota and geological events are all of great significance. By understanding the Ordovician, we can better understand the evolution of the Earth and the evolution of living things. Hope this article can helpHelp you have a preliminary understanding of the Ordovician.