The topography of an old subduction zone is disturbed by the San Andreas Fault, which is a component of a transform plate boundary.
The San Andreas Fault is thought to be the transform (strike-slip) border between two significant plates of the Earth's crust: the North American to the north and east and the Northern Pacific to the south and west.
The San Andreas is categorized as a strike-slip fault because the Northern Pacific plate is passing the North American plate laterally in a northerly manner.
Over the course of geologic time, the movement of the plates with respect to one another has averaged around 1 centimeter each year.
Large earthquakes that originate close to the surface occasionally occur along the fault and have been linked to tectonic action, notably the tragic 1906 earthquake in San Francisco.
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a high point or ridge that determines the direction rivers flow
A divide is a high point or ridge that determines the direction rivers flow.
Rivers are often divided by high points or ridges that act as a boundary, determining the direction in which they flow.
These divides are important geographic features that mark the area that a river will flow through. They can also serve as boundaries between different watersheds or drainage basins, helping to define the geography of the area.
A divide is an elevated area of land that separates two drainage basins, often determining the direction in which rivers and streams flow.
This ridge or peak is typically the highest point in the surrounding area, and can be found in many regions throughout the world.
It is important to recognize the significance of divides, as they can influence the paths of water and the geology of the land.
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