William Morris Davis Quote

Once established, an original river advances through its long life, manifesting certain peculiarities of youth, maturity and old age, by which its successive stages of growth may be recognized without much difficulty.


'The Rivers and Valleys of Pennsylvania', The National Geographic Magazine, 1889


Once established, an original river advances through its long life, manifesting certain peculiarities of youth, maturity and old age, by which its...

Once established, an original river advances through its long life, manifesting certain peculiarities of youth, maturity and old age, by which its...

Once established, an original river advances through its long life, manifesting certain peculiarities of youth, maturity and old age, by which its...

Once established, an original river advances through its long life, manifesting certain peculiarities of youth, maturity and old age, by which its...