First era of the Mesozoic (248-208 MYA).

The first period of the Mesozoic era (after the Permian of the Paleozoic era, and before the Jurassic), thought to have covered the span of time between 225 and 190 million years ago; also, the corresponding system of rocks. The Triassic is so named because of its threefold division in the rocks of Germany. Syn: Trias.

Period of geologic time 190-225 million years ago.

The first of the three Geologic Periods of the Mesozoic Era. It extends from the end of the Paleozoic Era (about 230 million years ago) to the beginning of the Jurassic Period (about 195 million years ago).

from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity

The first of the Mesozoic Ages. From 248 to 206 million years ago

Name for three major rock units identified in Germany by Frederich A. von Alberti as one system. Lowest unit in the Mesozoic.

It is a period of geological time which extends from 250 to 205.1 million years ago. It marks the begining of the Mesozoic Era.

the period of geologic time from about 225 and 190 million years ago. The Permian is the first period of the Mesozoic era.

The geological period between about 245 million years and 208 million years ago. Throughout this time much of the British Isles (indeed northern Europe) was land. The desert conditions are marked by deposits of so-called "New Red sandstone" (see Devonian).

The earliest period of the Mesozoic era, spanning the time between 248 and 213 million years ago. The name Triassic refers to the threefold division of rocks of this age in Germany.

(see Geological Timescale)

Period of geological time, 180 – 230 million years before present.

A period in the geologic time scale that spans from 245 to 208 million years ago.

the period of geological time between 248 and 213 million years ago. The name reflects the division of this time period into 3 parts. See Geological Timescale.

The first period of the Mesozoic, 250 to 208 million years ago. ( more about the Geological Timetable)

a geological time period approximately 251 to 205 million years ago.

The first geological period of the Mesozoic. It lasted from 225 Ma until 190 Ma. This period saw many land animal groups come and go, ending with the archosaurs diversifying into many of the niches available.

Geologic period that occurred roughly 208 to 245 million years ago. During this period, the first dinosaurs appeared.

A period of geological time from 250-40Ma;

A period of time stretching from 248 to 206 million years ago. During this time the first dinosaurs began to evolve, which later dominated the earth during the Jurassic and Cretaceous periods.

A period of geological time extending from 190,000,000-150,000,000 years BP.

the earliest period of the Mesozoic era, beofre the Jurassic, characterized by the appearance of dinosaurs and primitive mammals, the domination of the earth by reptiles, and much volcanic activity; the rocks formed during this period. [AHDOS

The Triassic is a geologic period that extends from about 251 ± 0.4 to 199.6 ± 0.6 Ma (million years ago). As the first period of the Mesozoic Era, the Triassic follows the Permian and is followed by the Jurassic. Both the start and end of the Triassic are marked by major extinction events.