Granite is a light-colored igneous rock found in the mountains. When granite weathers, it breaks down into larger grains of sand and much smaller particles of silt and clay. These pieces roll down the sides of the mountain and form piles. After many years, what type of rock would most likely be formed at the foot of a mountain? Responses Igneous rock will form since all mountains are formed from volcanoes. Igneous rock will form since all mountains are formed from volcanoes. Sedimentary rock will form as the layers sand, silt and clay are pressed together. Sedimentary rock will form as the layers sand, silt and clay are pressed together. Metamorphic rock will form due to the pressure caused by the movement of the mountain. Metamorphic rock will form due to the pressure caused by the movement of the mountain. Magma rock is formed from the intense heat released from the volcanic mountain.