As a period of geologic time, the boundaries of the Triassic are defined on the basis of rocks and the fossil record. It was the German geologist Friedrich August von Alberti who first marked the ...

The Triassic Period was a time of great change. Bookended by extinctions, this era saw huge shifts in the diversity and dominance of life on Earth, ushering in the appearance of many well-known groups ...

The Jurassic Period is one of the three prehistoric geological periods of the Mesozoic Era. It spans from 145 million to 201 ...

The Triassic period ends where it does is because that is a time that's marked by a major ... rate than anything that we can discern in the geologic record, except for the very brief catastrophic ...

At the same time, the large number of fossils ... A comprehensive overview of a geological period, like the Triassic, can ...

Earth’s continents are constantly shifting. About 252 to 199 million years ago, all the continents were actually one huge “supercontinent” surrounded by one enormous ocean. Slowly, this ...

During the first period of the Mesozoic Era (Triassic Period), many new types ... However, extinction is not a modern phenomenon. All through geologic time there have been extinctions mostly ...

The Triassic rocks that were laid down between ... spans nearly 200 million years of Earth’s history and three geological time periods. The clip explains the different rocks that can be found ...

Learn about the time period that took place 251 to 199 million years ago. 3 min read The start of the Triassic period (and the Mesozoic era) was a desolate time in Earth's history. Something—a ...