A mountain ridge that separates river systems is called a water shed. They are very common around large rivers and streams around the world.
watershed
continmental dividecontinental divide
A mid ocean ridge
A ridge of land separating river systems is called a water shed. Normally the land is very high up and mountainous.
The sharp jagged mountain top is called the peak. The very top of the mountain might also be referred to as the summit.
a divide
The Continental Divide of the Americas is an example of a mountain ridge that separates river systems. Further examples include Northern Divide or Laurentian Divide.
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Continental ridge
This is called an ARETE
the thin mountain ridge is called an arête.
Mountains. We use the term "divide" to mean the place on a mountain or ridge that separates two directions of water flow.
a fall off stream or a Mary's range.
ocean ridge
A saddle.
ridge
arete
A divide.