The Triassic Period is characterized by two main geologic events. The first was the creation and subsequent rifting of the supercontinent Pangaea. The second was the evolution of dinosaurs and mammals.Know More
At the beginning of the Triassic Period, the continents came together to form one large supercontinent called Pangaea. Pangaea was C-shaped and located on the equator. During this time, there were no ice caps at the north or south poles, causing a hot, dry climate. By the end of the Triassic Period, Pangaea began to rift and separate into two landmasses: Gondwana and Laurasia.
By the middle to late Triassic Period, dinosaurs and mammals evolved. Large reptiles called Therapsids were dominant during this period, and they were eventually replaced by Archosaurs. Archosaurs evolved to become bipedal, marking the beginning of dinosaurs. Aquatic reptiles and small, bird-like reptiles were also present.
The first observation of mammals occurred in the late Triassic Period. The Eozostrodon, a shrew-like mammal, was approximately 3 feet long. There is still much that is unknown about early mammals, but it is evident they had fur and three ear bones, and produced milk to feed their young. The Triassic Period ends with the Triassic-Jurassic mass extinction that widely affected ocean life and ushered in the dinosaur-dominated Jurassic era.Learn more about Geology
The Triassic period began approximately 248 million years ago and ended 206 million years ago; although, some sources date it to be between 251 and 199 million years ago. It was followed by the Jurassic period; it was the first period of the Mesozoic era.Full Answer >
The geology merit badge is an award given by the Boy Scouts of America for meeting requirements in the study of Earth, its resources and the events that changed it. Earning the geology merit badge has five broad requirements and numerous sub-requirements that a scout can choose to complete.Full Answer >
According to the Encyclopedia Britannica, the Triassic period was named after three rock layers found in central Germany that laid above the Permian layer and below the Jurassic layer. The original name "Trias" was later changed to "Triassic" as proposed by Friedrich August von Alberti in 1834.Full Answer >
Stromatolites are large formations of rocks that have been formed by the growth of multiple layers of bacteria over a very long period of time. These usually take the shape of mounds, columns and sheets. Cyanobacteria, single-celled microbes that can perform photosynthesis, develop into these stromatolites. There are many different layers to the various types of formations that stromatolites can take.Full Answer >