Creatures of the Jurassic Period
by Virginia Quach, age 12
day, about 65 million years ago, the skies got dark and the wind
started to howl. Then a giant meteorite crashed into planet Earth. That explosion ended the dinosaurs forever.
fellow writer, Giselle Sanchez, wrote about the Cretaceous time
period, but I will talk about the period before: the Jurassic period.
Jurassic period lasted from 200 to 145 million years ago. The name
came from limestone that was in Europe’s sea at the time and
eventually became part of the European Jura Mountains. Soon the
climate started to change, leading to more plant and animal life
during this period.
the climate changed, fish and birds started to develop. Forests
became more lush, and the sky more populated with several species of
new flying reptiles. Sea creatures called ichthyosaurs
pray on fish.
1676, the first dinosaur bones were discovered in England. The bones
most likely came from a carnivore called Megalosaurus.
had a length of 30 feet and a height of 10 feet; they weighed at
least one U.S. ton. They had a powerful jaw, sharp fangs, and long
claws. These weapons helped them kill plant-eating dinosaurs. A long
tail which probably swung from side-to-side while walking, helped the
keep its heavy body balanced.
1809, bones of a sauropod
were found. The bones were first believed to have belonged to a
marine animal. That is why this dinosaur’s name became Cetiosaurus,
which means “whale lizard”. They are believed to have weighed 10
U.S. tons. The Cetiosaurus’
thigh bone measured 6 feet, and its shoulder blade was over 5 feet.
This dinosaur probably ate a lot in order to have enough power for
though these dinosaurs from the Jurassic period are now extinct, we
can still visit and see their magnificent bones at different museums
around the world.
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