Triassic

The global climate during the Triassic was mostly hot and dry, with deserts spanning much of Pangaea’s interior. However, the climate shifted and became more humid as Pangaea began to drift apart.
The Triassic began in the wake of the Permian–Triassic extinction event, which left the Earth’s biosphere impoverished; it was well into the middle of the Triassic before life recovered its former diversity.
The vast supercontinent of Pangaea dominated the globe during the Triassic, but in the following Jurassic period it began to gradually rift into two separate landmasses, Laurasia to the north and Gondwana to the south.
Triassic (Wikipedia) The Triassic (/traɪˈæsɪk/ try-ASS-ik; sometimes symbolized 🝈) is a geologic period and system which spans 50.5 million years from the end of the Permian Period 251.902 million years ago (Mya), to the beginning of the Jurassic Period 201.4 Mya. The Triassic is the first and shortest period of the Mesozoic Era. Both the start and end of the period are marked by major extinction events. The Triassic Period is subdivided into three epochs: Early Triassic, Middle Triassic and Late Triassic.
Washington State Fossil Sites and Collecting Localities (fossilspot.com)

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Jurassic

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Mesozoic

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geologic period

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Paleozoic

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