Which type of geologic event has to occur to create an angular unconformity?

Question

folding or tilting of rock layers

uninterrupted deposition of sediment

sediment deposited on older, eroded igneous rock

igneous intrusion into layered rock

Answer 1

An angular unconformity is created when there is a period of folding or tilting of rock layers, followed by erosion, and then new sediment is deposited on top of the tilted or folded layers. Therefore, the correct answer is:

folding or tilting of rock layers.