( ) ǡ . ɡ - - : (980-1038) ( ) . - - - - ǡ . - . .
(Hutton 1797-1726) ( ) ( low of Uniformitorionism ) ( ) , (Tarbuck lutgens 1984) : " . [ ]. ǡ :" " (The Present is the Key to the Past ) .
" " 1026 .
: " ... ( ) ( ) ȡ "
- - . : " " .
:
( ) ( ) .
:-
1 - .
2- () .
: .
(Tarbuck lutgens 1984 ) ɡ " ѡ ȡ ɡ " " " ( 1983 Dr.Adms ) ! :-
(Geikie,1962) : " " 35 ( 1990) .
: ߡ - . : " !