Geological time- Triassic

Triassic Period

upper triassicEPOCH252 million to 247 mYA

Mid TriassicEPOCH247 million to 235 mYA

Lower triassicEPOCH 235 million to 201 mYA

Life

Events

World

Climate

Facts

References Ruckwied, Katrin, and Annette E. Goetz. "Climate change at the Triassic/Jurassic boundary: palynological evidence from the Furkaska section (Tatra Mountains, Slovakia)." Geologica Carpathica 60.2 (2009): 139-149. Schoepfer, Shane D et al. “The Triassic–Jurassic Transition – A Review of Environmental Change at the Dawn of Modern Life.” Earth-science reviews 232 (2022): n. pag. Web.

• The continents were grouped in a single supercontinent known as Pangea during the start of the dinosaur era

Climate Conditions

Triassic climate conditions appear to have been substantially more uniform than they are now. Polar ice didn't exist. There would have been less diversity in biological habitats as a result of less dramatic temperature fluctuations between the equator and the poles than there are now.

Of the Triassic Period

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Among tetrapods, the lissamphibians, turtles, lepidosaurs (lizards and relatives), archosaurs (crocodiles, dinosaurs, birds, and relatives), and mammals replaced the temnospondyls, parareptiles, and synapsids of the late Palaeozoic. The late Palaeozoic hybodont sharks and other fish started to be replaced by neoselachians in the Triassic, and the basic bony fishes with thick scales were replaced by neopterygians and subsequently teleosts. Lepidoptera (butterflies and moths), Hymenoptera (bees, wasps, and ants), Diptera (flies), and Trichoptera (caddisflies), among other important contemporary insect families, all first appeared in the Late Triassic;

Life During the Triassic

Archosaurs Between 246 and 229 million years ago, during the Middle Triassic Period, the earliest archosaurs that are currently recognized emerged. They descended from a previous group of diapsid reptiles, which had two holes behind the eyes in their skulls.

Ichthyosaur

• Creature largest of its time
• shark like
• driven to extinction due to climate change.
• Considered aquatic reptile.

• Late in the Triassic Period Pangea broke apart and split into other continents about 200MYA

Of the Triassic Period

Significant Events

• Triassic–Jurassic extinction event- one of the top five major extinction events of the Phanerozoic eon, marked the transition between the Triassic and Jurassic eras 201.4 million years ago and had a significant impact on life on land and in the waters.
• Permian–Triassic extinction event- Around 251.9 million years ago, the great dying marked the transition between the Paleozoic and Mesozoic eras and the Permian and Triassic geologic eras. It is the most severe known extinction event on Earth and the greatest of the "Big Five" mass extinctions of the Phanerozoic, with the extinction of 57% of biological groups, 83% of genera, 81% of marine species, and 70% of terrestrial vertebrate species. This insect mass extinction is the biggest one ever recorded.

Pangaea began to rift and fragment in the Early Triassic, and this process persisted and accelerated towards the start of the Norian. Early Triassic stretching sparked the division of North America and Gondwana, which persisted until the Late Triassic rifting period. The most significant Triassic convergent event was the Indosinian orogeny, the consolidation of Chinese blocks with Cimmerian Plates

Triassic

The World

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Hot summers/ cold wintersaridinterior of pangea was desertcoal deposits relative high rain falllush vegitation with poor drainage due to depositsmonsoonal climateformation of redbed sandstone and evaporites

Strong Monsoonal Climate The tropical monsoon climate is the intermediate climate between the wet climate and the drier climate.

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Of the Triassic Period

Interesting Facts

• First and shortest period of the Mesozoic Era
• First mammals introducted
• First Dinosaurs introducted
• Red sandstones appeared in this time and can still be found today in North America and Africa.
• Early Triassic, a time for life to recover
• Most Life could be found around the edge of Pagea and not on the interior as it was desert.