The steep terrain in the South Fork Eel's watershed is the result of continuous uplift along the San Andreas Fault, and coinciding with the erosion caused by the river and its tributaries, steep canyons and ridges, many with slopes of over 50 percent, were formed.
South Africa | New South Wales | South Korea | South Australia | South America | South Carolina | Mississippi River | River Thames | South Dakota | Amazon River | Columbia River | University of New South Wales | South Island | South India | Hudson River | Colorado River | Potomac River | South Park | river | South Vietnam | Ohio River | South Yorkshire | Newcastle, New South Wales | Missouri River | Delaware River | Murray River | South Wales | South Asia | South Shetland Islands | South Pacific |