On the map , #2 is identifying which mountain system?

Sierra Madre

Explanation:

The Sierra Madre Occidental is a part of the North American Cordillera mountain belt. It runs directly from the NW part of the US to the SE direction of the US, that passes through the North-Western part and the West of Mexico City and the Gulf of California.

It is a high volcanic plateau that is eliminated at some particular places where the basement rocks are exposed to the surface. These are comprised of plutonic as well as sedimentary types of rocks that are found to be present below the two distinct formations of extrusive volcanic rocks. These lower volcanic rocks are made from the flow of lava.

In the given figure, location 2 depicts the Sierra Madre Occidental and locations 1 and 3 are the Rocky Mountains and the Appalachian mountains respectively.

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