Land Bridges

During the last ice age the geographical boundaries of the continents were very different from how they are today. Below is a map of how the boundaries looked 65,000 years ago.  

 

 

landbridge oz.jpg (19868 bytes)   Click on this thumbnail to view a larger map of the land bridge which connected Australia to the island of the south east Pacific 65,000 years ago

(Original Images from Encarta 99)

 

 How often do Ice Ages occur?

 

Paleoclimatologists that study ancient climates of the earth have identified three distinct periods of glaciation: 1.) a period of glaciation around 600 million years ago about which little is known, 2.) glaciation that effected areas of Africa, India and Australia approximately 275 million years ago, and 3.) the most recent period, which began about 1.5 million years ago and ended (or at least subsided) within the last 15,000 years. The last ice age was called "The Great Ice Age" and was 11,000 years ago. During this "Great Ice Age" over a third of the earth was covered in ice.

 

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