No, mountains that form when molten materials reach the Earth's surface through a weak area in the crust are called volcanic mountains or volcanoes.

Fault-block mountains are formed by tectonic activity where large blocks of the Earth's crust are uplifted or tilted along faults.

Here's a breakdown:

* Volcanic Mountains: Formed by the accumulation of lava and ash from volcanic eruptions.

* Fault-Block Mountains: Formed by the movement of tectonic plates, causing large blocks of rock to be uplifted or tilted.

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