Yes they did and afterwards as well.
Rocks did not form in a specific era like the Mesozoic. Rocks form over long periods of time through geological processes such as erosion, sedimentation, and metamorphism. The Mesozoic era is known for the evolution of dinosaurs and the breakup of the supercontinent Pangaea.
The Paleozoic came before the Mesozoic.
In the mesozoic era
the first type of life form that appeared in the mesozoic era was a fish! the second type of life form that appeared in the mesozoic era was the reptile! and the third was a reptile bird!!!!!!!!!!!!!!!!
Yes, the Cambrian Period was before the Mesozoic Era
The Paleozoic era was from 540 million years ago to about 245 million years ago. After that came the Mesozoic era, and that lasted from the end of the Paleozoic to 65 million years ago, when the earth entered the Cenozoic era.
Mesozoic
The current era is Cenozoic era. The preceding era was Mesozoic era. However if you are looking for periods in Cenozoic era, the current one is Neogene period, the preceding period was paleogene period.
The Rocky Mountains starting forming when the Mesozoic era begun.
The Cenozoic era was not a subdivision of the Mesozoic era. The Mesozoic era is subdivided into the Triassic, Jurassic, and Cretaceous periods.
Mesozoic Era
The Paleozoic precedes the Mesozoic. And our current era, the Cenozoic, follows the Mesozoic.