Geological time- Triassic

Triassic Period

upper triassic EPOCH 252 million to 247 mYA

Mid Triassic EPOCH 247 million to 235 mYA

Events

Climate

Life

World

Facts

Lower triassic EPOCH 235 million to 201 mYA

Climate Conditions

Of the Triassic Period

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.

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

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

Significant Events

Of the Triassic Period

• 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.

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

The World

Triassic

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

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Hot summers/ cold winters arid interior of pangea was desert coal deposits relative high rain fall lush vegitation with poor drainage due to deposits monsoonal climate formation of redbed sandstone and evaporites

Interesting Facts

Of the Triassic Period

• 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.