Faults are of all sizes, from a foot or two up to vertical displacements of thousands of feet.
"Geology"
James Geikie
The magnitude of the displacements that have been noticed sometimes attains many thousands of miles, and the actual velocity with which such masses move frequently exceeds 100 miles a second.
"The Story of the Heavens"
Robert Stawell Ball
Some were half nomad, none was firmly rooted in the soil; and the fact that tribes who spoke similar dialects were often far away from one another, with a tribe of a different dialect living between, indicated that there had been many displacements of population of which no historical record existed.
"Impressions of South Africa"
James Bryce