- Limestone is a kind of sedimentary rock
- Shale is a kind of sedimentary rock
- Therefore, shale and limestone are different kinds of sedimentary rock

- Shale and limestone are different kinds of sedimentary rock
- Environments changing can cause layers of rock that are on top of each other to be of different kind
- A layer of shale is on top of a layer of limestone
- So, environments changing causes the shale and limestone to be on top of each other

So, environments changing causes the shale and limestone to be on top of each other
[Question]A road cut shows a layer of shale on top of a layer of limestone. This indicates
[Context]- Environments changing can cause layers of rock that are on top of each other to be of different kind 
- Limestone is a kind of sedimentary rock 
- Shale is a kind of sedimentary rock 
- A layer of shale is on top of a layer of limestone