It is the Mesozoic Era which is divided into 3 periods - the Triassic, the Jurassic and the Cretaceous.
The Mesozoic era is divided into Triassic, Jurassic and Cretaceous time periods.
We are currently in the Cenozoioc Era (sub-era Tertiary); the era is divided into 3 periods, starting with the Palaeogene, then the Neogene, & now the Quaternary period. The era before this one was called the Mesozoic Era
== In geology and paleontology, an eon is the largest division of time. Eons are then divided into eras, and eras are divided into periods. So yes, an era is shorter than an eon. More And then periods are divided into series or epochs
Eras divide into periods and periods divide into epochs. The Palaeozoic Era is composed of the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian periods (in that order). The Mesozoic Era is divided into the Triassic, Jurassic and Cretaceous periods. The Cenozoic Era is divided into the Tertiary and Quaternary periods. The Tertiary period is divided into the Palaeocene, Eocene, Oligocene, Miocene and Pliocene epochs while the Quaternary period is divided into the Pleistocene and Holocene epochs. Note that eras are not the longest lengths of time. Eras may compose longer stretches of time known as eons/aeons.
That is a good question. Actually the Precambrian is divided into sections. Wikipedia has a good review of its subsections.
The Age of Reptiles was the Mesozoic Era. The three periods were the Triassic, Jurassic, and Cretaceous.
there are different periods in each era. In the Cenozoic era, there are 2 periods, Quaternary and Tertiary. Mesozoic era has 3 periods, Cretaceous, Jurassic, and Triassic. Paleozoic has 7 periods, Permian, Carboniferous, Devonian, Silurian, Ordovician, and Cambrian. Precambrian is just the present, no time periods in it.
Stone age
The three periods of Roman history were the monarchy, the republic and the principate. They were divided this way by the types of government in those periods.
The dinosaur age is known as the Mesozoic era. It is divided into three periods, the Triassic, the Jurassic, and the Cretaceous. Each of those is further divided into stages. There are a total of 29 stages in the Mesozoic.
There were three geological periods in the Mesozoic Era(251 - 65Ma).The Triassic Period(251 - 199Ma),the Jurassic period(199 - 145Ma) &the Cretaceous Period(145 - 65Ma).