Which type of unconformity exists between two horizontal rock layers if the older rock is much older than the younger rock?

a. disconformity

b. nonconformity

c. angular unconformity

The type of unconformity exists between two horizontal rock layers if the older rock is much older than the younger rock is : Angular Unconformity.

The sedimentary in this interaction created some sort of angular discordance with the overlying horizontal layers