As streams flow through Stone Mountain, layers of sand build up. Over time, the sand particles form a sedimentary rock called sandstone.

Question

What causes sandstone to change into metamorphic rock at Stone Mountain?

Sandstone is reshaped by erosion from a stream.
Sandstone builds up layers of sand at the mountain.
Sandstone experiences intense heat and pressure.
Sandstone has more sand particles compacted on top of it.

Answer 1

The correct answer is: Sandstone experiences intense heat and pressure.

When sandstone undergoes metamorphism, it is subjected to high temperatures and pressures, often due to tectonic activity or burial under additional layers of rock. This process can alter the mineral composition and physical structure of the sandstone, transforming it into a metamorphic rock known as quartzite.