rn region once had a rich rainforest. Deposits found at the Simposn desert suggest central Australia had a closed forest. Yet, potentially less diverse than forest jacketing the northern regions. Modern Rainforest offer a complex history of the Australasian regions rainforest. The ‘palaeoaustral’ rainforest have taken refuge in northeastern QLD and the mountains of New Guinea. The origins of New Guinea’s forest have Gondwanan origins. Nonetheless, the rainforest of the region had to be created by “…drifting micro continental fragments…” that produced forests origins in Gondwanan, India, and etc. 15 million years ago landmasses from southeastern Asian plates and the Australian crustal plates collided and were respectively “…shoved down each other’s throats.” Thus a decline of Australia’s rainforest in the central and northern regions due to build up of mountains. Now, weather would be affected and possibly productive rainfall would be lost to the highlands of New Guinea. Increasing problems were permanent polar icecaps, and cooler oceanic temperatures. Thus, effectively reducing the amount of precipitation and a stage of cooling and drying occurred. Migration of animals and plants (rainforests) were increased with the contact of Asian land. Various groups could make beneficial advances by using the migration routes. These migration routes, which allowed reptiles, frogs, birds, bats, and rats migrate into Australia. Before colliding with Asia and its separation with Antarctica Australia might have supported biota, which included Eurasian and Gondwanan clusters. The evidence for this comes from rich fossil deposits at Riversleigh. “Riversleigh’s fossil deposits indicate that a number of vertebrate groups probably first entered Australia from south eastern Asia more than 30 million years ago.” There is no relating evidence of Asian ta...
