300 Million years ago the land masses on earth had solidified and formed a huge single super continent: Pangaea.

200 Million years ago this super continent started to break up into Laurasia in the northern hemisphere and Gondwana in the south. 

100 Million years ago in what is called 'The Cretaceous'  Gondwana was breaking up and the continent which was to become Australia started its journey into isolation from all other continents on Earth.

The Cretaceous was a time with a warm and moist climate in Australia and with extensive rainforests. Large parts of Australia were flooded and a shallow sea called Sea of Eromanga, covered much of today's Outback. It was the time of the last huge plant eating dinosaurs, of strange and dangerous creatures in the ocean, of flying reptiles as big as elephants and... 

it was the time when Muttaburrasaurus hatched:

Enter our world:
 More Australian Dinosaurs and Reptiles

	Neoceratopian:  a dinosaur with a strange looking face
	Leaellynasaura amicagraphica:  the gazelles of the dinosaur world
	Nanantius eos:  it almost looked like a bird
	Austrosaurus mckillopi: the big plant eating dinosaur
	Minmi paravertebra:  the dinosaur in armour
	Caenagnathid:  small but dangerous
	Pteranodon sp:  the giant flying machine
	Kronosaurus queenslandicus:  the hunter in the sea
	Woolungosaurus glendowerensis: perfectly adapted to the sea
	Muttaburrasaurus:  the plant eating dinosaur of Central Queensland
or read more about the dinosaurs of Australia and especially Queensland