Question

which type of unconformity shows tilted older layers overlain by flat younger layers? nonconformity disconformity angular unconformity parallel unconformity

Explanation:

Angular unconformity occurs when tilted older rock layers are overlain by flat - lying younger layers. This represents a significant period of erosion and a change in the depositional environment. Nonconformity is between sedimentary and igneous/metamorphic rocks, disconformity has parallel layers with an erosion surface in between, and parallel unconformity is another term for disconformity.

Answer:

C. Angular unconformity