The Paleozoic Era was a prehistoric period in earth's history that ran for about 290 million years. The University of California Museum of Palaeontology reports that the beginning of the Paleozoic Era was defined by an explosion of species diversity as multicelled animals began to evolve into different species. The Paleozoic Era ended with a mass extinction event that wiped out about 90 percent of all these new species.Know More
Live Science explains that the Paleozoic Era is further divided into six periods, each of which was tens of millions of years in length. The first was the Cambrian Period, during which the first animals with spinal columns appeared. During the second, the Ordovician Period, many new fish and marine invertebrate species appeared. This process continued in the Silurian Period, during which time more species of fish also appeared. The fourth, the Devonian Period, was the first time animals emerged from the sea to live exclusively on land.
Further explained by Live Science is how species continued to evolve at a rapid in the second half of the Paleozoic Era. During the Carboniferous Period, animals that could lay eggs on land evolved, allowing them to further distance themselves from the water. Finally, during the Permian Period, life on land divided into herbivorous and carnivorous species.Learn More
During the Paleozoic Era, there were multi-cellular organisms like trilobites, mollusks, jawless fish, seaweeds and finally, jawed fish, sharks, plants and early amphibians and reptiles. At the beginning, there was an increase in diversity of multi-celled animals, while the end of the era was marked by the largest mass extinction in history.Full Answer >
The periods of the Paleozoic Era were named for the locations, mostly in Great Britain, where rocks associated with them were found, according to the University of Oklahoma. The Cambrian Period, for example, is derived from the ancient Latin name for Wales, which has extensive Cambrian deposits.Full Answer >
The Paleozoic Era saw changes to Earth's landscapes, life forms and atmosphere over the course of several million years. On land, at sea, below the surface and in the skies, change occurred throughout the six distinct periods comprising the Paleozoic Era. The early Paleozoic periods introduced many plant species, while later periods brought invertebrates, dinosaurs and birds.Full Answer >
The Paleozoic Era lasted about 300 million years. This era comprised six periods: the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian. The Paleozoic saw the appearance of almost all groups of life.Full Answer >