- Sedimentary rock is a kind of rock
- Metamorphic rocks are formed by rocks being exposed to extreme heat and pressure
- So, metamorphic rocks can be formed by sedimentary rocks being exposed to extreme heat and pressure

- Metamorphic rocks can be formed by sedimentary rocks being exposed to extreme heat and pressure
- To be exposed to something means to be subjected to something
- Hence, metamorphic rocks can be formed by sedimentary rocks being subjected to extreme heat and pressure

- Metamorphic rocks can be formed by sedimentary rocks being subjected to extreme heat and pressure
- Limestone is a kind of sedimentary rock
- So, metamorphic rocks can be formed by limestone being subjected to extreme heat and pressure

- Metamorphic rocks can be formed by limestone being subjected to extreme heat and pressure
- Marble is a kind of metamorphic rock
- So, marble can be formed by limestone being subjected to extreme heat and pressure

Therefore, marble can be formed by limestone being subjected to extreme heat and pressure
[Question]Which type of rock is formed when limestone is subjected to heat and pressure?
[Context]- Limestone is a kind of sedimentary rock 
- Sedimentary rock is a kind of rock 
- To be exposed to something means to be subjected to something 
- Marble is a kind of metamorphic rock 
- Metamorphic rocks are formed by rocks being exposed to extreme heat and pressure