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Mesozoic era and Cenozoic Era
Paleozoic Era - 291 million years (542 - 251 Ma)Mesozoic Era - 185.5 million years (251 - 65.5 Ma)Carboniferous Period - 62.2 million years (359.2 - 299Ma)Jurassic Period - 54.1 million years (199.6 - 145.5 Ma)
The Paleozoic era represents the longest timespan from the list. It ran from 542 to 251 million years ago, a total time of 291 million years. It is also worth noting that an era always represents a longer timespan than a period and in fact an era will be composed of a number of periods. For completeness, the other time spans mentioned in the question are given further detail below: The Mesozoic era ran from 251 to 65.5 million years ago. A timespan of 185.5 millions years The Carboniferous period ran from 359.2 to 299 million years ago, A timespan of 60.2 millions years. The Carboniferous period is one of the subdivisions of the Paleozoic era. The Jurassic period ran from 199.6 to 145.5 million years ago. A timespan of 54.1 millions years. The Jurassic period is one of the subdivisions of the Mesozoic era. For further information, please see the related links.
Carboniferous
No, Technically cordata were introduced in the late Camrian period in the form of small fish.. But The Devonian period is when the first large sharks and fish began to apear, I also believe that amphibians were on land in the mid-late devonian, and were abundant in the Carboniferous.
paleozoic
Mesozoic era and Cenozoic Era
C - PALEOZOIC ERA
Hydrocarbons and coal were formed in what is known as the carboniferous era.
The fossils of the earliest reptiles are about 320 million years old. They date back to the Carboniferous period. The Carboniferous was a period in the Paleozoic era.
The Paleozoic
Starting with the oldest, they are the: Cambrian, Ordivician, Silurian, Devonian, Carboniferous, and Permian.
era,epoch, and period are periods of time that happen in the past
Paleozoic Era - 291 million years (542 - 251 Ma)Mesozoic Era - 185.5 million years (251 - 65.5 Ma)Carboniferous Period - 62.2 million years (359.2 - 299Ma)Jurassic Period - 54.1 million years (199.6 - 145.5 Ma)
Coal beds formed during the Carboniferous Period, approximately 300 to 360 million years ago. This period was characterized by extensive forests being buried and compressed over time, eventually transforming into coal deposits.
The Paleozoic era represents the longest timespan from the list. It ran from 542 to 251 million years ago, a total time of 291 million years. It is also worth noting that an era always represents a longer timespan than a period and in fact an era will be composed of a number of periods. For completeness, the other time spans mentioned in the question are given further detail below: The Mesozoic era ran from 251 to 65.5 million years ago. A timespan of 185.5 millions years The Carboniferous period ran from 359.2 to 299 million years ago, A timespan of 60.2 millions years. The Carboniferous period is one of the subdivisions of the Paleozoic era. The Jurassic period ran from 199.6 to 145.5 million years ago. A timespan of 54.1 millions years. The Jurassic period is one of the subdivisions of the Mesozoic era. For further information, please see the related links.
Carboniferous