What would happen if a sedimentary rock was first exposed to energy from the sun and then millions of years later to energy from the Earth's interior?

to me personally I think They would become igneous rocks

Explanation:

If originally, sedimentary rocks are exposed to energy from the sun, no changes will occur to them.

The temperature of the sun does not change the materials of the earth substantially. There is a very significant effect of the heat from the interior on rocks, especially sedimentary rocks. Heat can hit a whopping 6000 ° C from the inside, which is more than enough to cause a metamorphic shift in a rock in the body. Actually, the igneous rock will be formed from the sedimentary rock at this temperature.