1.   One process which has certainly been important is geographical isolation.

2.   Steamboats, railways and telegraphs broke down geographical isolation.

3.   There is debate about whether a single species can split into two without geographical isolation.

4.   To begin with Darwin had solved this problem by invoking geographical isolation.

5.   Because of its geographical isolation, the area developed its own unique culture.

6.   God bless geographical isolation, Almqvist says.

7.   In a strange way, the geographical isolation of Nunavut has proved a blessing for the Inuit.

8.   To be honest, the grounds for subspecific status are probably based more soundly on geographical isolation than physical appearance.

9.   Geographical isolation and a backward economy have heightened the tensions.

10.   The geographical isolation of the islands is made worse by climatic conditions.