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Silurian

Published on Nov 05, 2015

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PRESENTATION OUTLINE

1.

SILURIAN

THE PALEOZOIC ERA
2.

How it started
Rising temperatures
Rising sea levels

3.

When the Silurian period happend
444 to 416 million years ago

4.

Silurian Climate
The climate was much warmer during the Silurian Period. This caused the glaciers to melt and the seas to rise. Even though the sea level was rising, there were places where the land was slowly rising as well. This was due to mountain building as the continental plates collided. In these places the seas moved away from the coasts or evaporated from the shallow areas. This left salt deposits. Plants that had lived in the coastal water had to adapt to life on land or die.

5.

Continents
Gondwana was still located in the southern hemisphere, but it stretched from the Equator, where modern-day Australia was located, to the South Pole, where modern South America was located. The tectonic plate that contained North America was moving toward the southeast. By the end of this period it would collide with another plate and form a mountain range. Most of North America was covered by shallow seas during this time.

6.

ANDREOLEPIS

A JAWED FISH FROM THE SILURIAN PERIOD
7.

Romundina
A PRIMITIVE ARMORED FISH WITH A CARTILAGE SKELETON — IS EARLIEST FISH KNOWN TO HAVE DEVELOPED JAWS.

8.

SCALELIKE LEAVES

LIKE THE CLUBMOSSES
9.

MILLIPEDES

MILLIPEDES ARE MYRIAPODOUS ARTHROPODS THAT HAVE TWO PAIRS OF LEGS
10.

Eospermatoperis
A 8 meter tree

11.

COLLEMBOLANS
SPRINGTAILS FORM THE LARGEST OF THE THREE LINEAGES OF MODERN HEXAPODS

12.

Trigonotarbids
is an extinct group of arachnids whose fossil record extends from the late Silurian to the early Permian.

13.

Acaenoplax
is an extinct worm-shaped mollusc known from the Wenlock Series lagerstätte of Herefordshire, England. It lived in the Silurian period.

14.

Crustacean
Form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles.

15.

Archaeopteryx
sometimes referred to by its German name Urvogel, is a genus of early bird that is transitional between feathered dinosaurs and modern birds.

16.

The silurian drew to a close with a series of extinction events linked to a climate change, however these were relatively minor compared to with other geological periods

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