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BORNEO FROM

ASIA                                         958                  10                        10

 

NEW GUINEA FROM AUSTRALIA  775                   8                          10

 

SCOTLAND FROM

SWEDEN                                   840                     8.5                    10

 

INDIA FROM

E. AFRICA                                 4370                   43                      10

                                               

 

 

ALASKA FROM

N.W. RUSSIA                             5200                    52                     10

 

               

          

Diagram of the Clam-shell Expansion

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note: in the above diagram, the position of the mid-ocean ridge never changes as the diameter of the Earth increases. The hinge position is also maintained. Laurasia and Gondwana, at the centre of the diagram, are the upper and lower components, respectively, of the small clam-shell.

 

 

THE CLAM-SHELL
EXPANSION
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