Transcript Triassic period - Digging-Up-The-Past

Trissic period
Ethan guest
Environment
• 251 mya to 199 mya.
• The start of the Triassic period (and the Mesozoic era) was a
desolate time in Earth's history. Something—a bout of violent
volcanic eruptions, climate change.
• perhaps a fatal run-in with a comet or asteroid—had triggered the
extinction of more than 90 percent of Earth's species.
Land
• The Triassic period was a transition from the Paleozoic Era
to the Mesozoic. It is situated between the end of the
permian period and the beginning of the Jurassic, lasting
from 254 mya to 206 mya.
•
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As with almost any other period
of the Earth's history, the
Triassic had a unique climate and biota indigenous to that
time. The paleoclimate was influenced largely by tectonic
events that never existed before or since.
weather
• The Triassic Period (250-108 million
years ago): In Triassic times, all of
the earth's continents were joined
together into a vast landmass called
Pangaea
vegetation
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The Triassic period (248 - 206 million
years ago).
the Triassic Period followed the biggest
mass extinction in the history of the Earth,
the Permian extinction.
• This left the Earth relatively unpoplated
(especially the seas) and ready for new
life.
•
Jurassic Period
Ethan guest
Environment
• Pangaea started to break apart during the
Jurassic Period. The Atlantic Ocean
opened to the west of Britain and the
Americas drifted away from Europe. The
Earth was relatively warm, sea levels were
high and there were hardly any polar ice
caps.
Land
• The giant continent Pangaea broke up into
two landmasses known as Laurasia (in the
north) and Gondwanaland (in the south).
The budding Atlantic Ocean started to
separate Eurasia and North America.
Weather
• Jurassic climate stayed warm and became
more humid. The polar areas were ice-free
during this Period.
vegetation
• The rainfall on the lands was sufficient to
support luxuriant vegetation. There were
no ice-caps, and the seas were very warm
and clear. Over wide areas old land areas
were covered by shallow water.
Cretatious period
Ethan Guest
Environment
• The world during the Cretaceous looked
very different. Its continental arrangement
was different, as was the 'flora and fauna'
that survived in a very different climate.
Land
• During the Late Cretaceous, land and
seas continued to change and move. The
climate of the world changed toward
cooler and more seasonal weather. New
types of plants and animals were
appearing.
Weather
• There was a major change in the climate
in the Cretaceous Period. During the
Cretaceous Period the weather was very
warm. It was considered "tropical." At
around the ending of the Cretaceous
Period, however, the temperature dropped
making the climate very cold.
Vegetation
• The main innovation of the Cretaceous
was the evolution of flowering plants,
which spread across the separating
continents, along with thick forests and
other kinds of dense, matted vegetation.
Dinosaur Extinction
• Well some people believe that there are
two ways that dinosaurs got extinct the
first reason is because the great flood the
time when Noah built the ark and the
massive earthquake. There was no sun it
was just pitch black. There was no air for
them to breathe in. so no one really knows
what happened.