At what point in Earth's history does the Triassic period fall?

The Silurian period is one of the geological eras.

The Quaternary is the most recent era in Earth's history.

The Devonian period was a very important time in the history of the Earth.

The Triassic period is one of the geological ages, referring to the period from about 252 million years ago to about 200 million years ago.

The Ordovician, an era name used in paleontology, is now called the Ordovician.

Old Church Slavonic is the oldest recorded language of the Slavic group.

Old Church Slavonic is the first language written by the Slavs.

I plan to travel to the Czech Republic next year.

My friend came from the Republic of the Congo.