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Barbara Metivier Mini-Research Project
barbara metivier
Created on September 25, 2024
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Transcript
As mentioned above the events of orogeny led to significant amounts of igneous rocks forming. This is mostly characterized during the Jurassic and Cretaceous periods due to high amounts of volcanic events, some of them being the largest we have ever recorded.
Notable events of orogeny, also known as mountain building, took place during this era. It gave us various terranes in North America and the well-known Rocky Mountains.
This era could also be referred to as the “Age of Reptiles” due to the high amounts of dinosaurs, crocodiles, and other animals that roamed both land and air.
At the beginning of the Mesozoic era, the continents formed Pangea. This is when most of Earth’s land was a singular landmass or supercontinent that existed millions of years ago. By the later end of the era, it could be observed that the landmass was starting to break off into smaller bits.
The Mesozoic era consists of the following periods: the Triassic, Jurassic, and Cretaceous. These names are constantly referenced when dinosaurs are mentioned, which just so happens to be the main highlight of this era. Many reptiles, birds, and mammals roamed through this era until a massive extinction event occurred marking the end of this era. This can all be attributed to volcanic activity, plate tectonics, cooler climates, and an infamous meteorite/asteroid striking. It is believed that the wildfires, darkness, lowering temperatures, acid rain, and intense warming caused by the asteroid led to the end of non-avian dinosaurs and many other organisms.
The climate at the beginning of this era could be characterized as warm and dry, with little to zero evidence of ice existing at Earth’s poles. Throughout a more tropical climate could be observed. Lastly, by the closing bits of this era rising sea levels and the breaking apart of Pangea carried warmer water towards Earth’s poles, ultimately creating a mild global climate. Following the great extinction towards the end of the Permian created an opportunity for a new world of animals to evolve in this era. Tortoises, lizards, marine reptiles, and dinosaurs were among some of the first to appear. As well as, the first bird and flying reptiles. If we also consider the start of flowering plants, we would have been able to observe many modern-day insects such as bees, grasshoppers, ants, butterflies, termites, etc.