Answer:
3. Rocks erode and sediment is deposited.
4. No sediment is deposited over a long time.
Explanation:
An unconfomity is a break in stratigraphic record of a place usually as a result of non-deposition or erosion.
In a sequence of sedimentary rock strata some surfaces called unconformity surfaces gives clues about the depositional history of a particular place. During an unconfomity, there is usually no sediment deposition and when deposition resumes, the underlying rocks and the new ones will not share the same attribute especially by age. Unconformity can also be as a result of erosion of a sequence.
In the case of non- conformity, a sedimentary rock is deposited above an igneous or sedimentary rock. Option 5 is a simple example of an igneous intrusion called a sill. It is not unconformity.
The statements explain reasons is according to the question, Rocks erode and sediment is deposited. No sediment is deposited over a long time.There is no single time span represented by an unconformity.
Unconformities happen for two reasons: sediment deposition stopped for a considerable time and/or existing rocks were eroded prior to being covered by younger sediment. There is no single time span represented by an unconformity.
Thus, option 3 and 4 are correct.
To learn more about the Unconformities click here:
https://brainly.com/question/12975849
