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The Mid-Atlantic Ridge separates the North American plate from the African plate. This ridge runs through the Atlantic Ocean and marks the boundary where the two plates are moving apart.
Its the Ural Mountains in Russia
The Mid-Atlantic Ridge is a divergent boundary where the North American Plate and the Eurasian Plate are moving away from each other. It is not a distinct tectonic plate itself but rather a boundary between two plates.
The Ural Mountains and the Ural River mark the western boundary of Asia.
Approximately 66° 33' 39" N marks the boundary of the Arctic Circle
The official definition of boundary is "a line that marks the limits of an area; a dividing line."
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Flywheels that require alignment will generally have marks.Flywheels that require alignment will generally have marks.
The heliopause marks the outer boundary of our solar system. This is where the solar wind from the Sun meets the interstellar medium of space.
the continental shelf, which is an underwater landmass extending from the shoreline to the continental slope. This boundary represents the transition from continental crust to oceanic crust and generally marks the end of the continent.
This marks the boundary of a water hazard.