Dinosaur World

The world has not always looked the way it does today. Continents are constantly moving, and this very gradually changes the appearance of earth. The Triassic, Jurassic,And Cretaceous worlds all looked very different from one another, Mountains grow up; erosion wore land away, and plants and animals, including the dinosaurs, appeared and disappeared.

Changing Earth:


The Earth's outer layer consists of huge plates, made up of crust  (The rocky outside) and the topmost part of the mantle (the dense substance below ). along one edge and constantly moving, growing along one edge and being destroyed along the older .

Moving plates:

As the plates move, they either collide, which sometimes forms mountain ranges, Or they move apart, forming new crust. When plates move apart,molten mantle rock rises between them, cools,and adds to the earth's crust.

World Map of Plates

Plates Boundaries: 

There are nice main plates and several smaller ones. The plates are in constant motion, at a rate of only a few inches each year.

Triassic World :

In the  Triassic period, when dinosaurs first appeared on Earth, all the land was joined together forming one gigantic continent. Scientists call this supercontinent Pangaea . 

Jurassic World :

In the jurassic period, Pangea gradually split into two continents. The continent in the north, made of large  landmasses and smaller islands, is called laurasia. The continent in the south is called Gondwanaland.

Cretaceous World: 

Toward the end of  the cretaceous period, the continents broke up into smaller landmasses .plates collided, forming the rocky Mountains in North America and other mountains ranges.