Paris biota

The Paris biota is a very important group of fossils from the Early Triassic, about 249 million years ago. These fossils were first found in Paris Canyon, west of the town of Paris in Bear Lake County, southeastern Idaho, United States. Later, similar fossils were also discovered in northeastern Nevada, specifically in Elko County, as well as in Bear Lake and Caribou counties in southeastern Idaho.

This collection of fossils is special because it shows many different kinds of life from that ancient time. Studying the Paris biota helps scientists learn what the world was like millions of years ago and how life changed after big events such as mass extinctions. The fossils give us clues about the plants and animals that lived together in those early days of the Triassic period.

Age

The Paris biota was found in layers from the earliest Spathian, a part of the Early Triassic. Scientists learned this by studying special fossils like ammonoids such as Tirolites and certain conodonts. These fossils helped them find the exact age of the rocks. The Paris biota was also found in newer layers in Nevada, which have fossils that help tell the age.

Palaeogeography and paleoenvironment

The organisms of the Paris biota lived in a shallow marine epicontinental sea in what is now the western USA. This sea was part of the western coast of Pangea, a huge ancient supercontinent. During the Early Triassic epoch, these sites were close to the equatorial region.

Assemblage

The Paris biota is an old group of fossils from about 249 million years ago. People found them in southeastern Idaho, United States. They show some of the first many kinds of sea life after a big change in Earth's history.

These fossils include many types of sea creatures, like sponges, brachiopods, mollusks, arthropods, and early vertebrates. The fossils also show algae and traces of old waste. This mix of species helps us learn how life came back after big changes on our planet.