A question says: You are standing by a cliff far away from the ocean. You see a sedimentary layer with shells in it. You are told the shells are from oceanic organisms. How do you think this layer formed?
My thinking: I think this layer formed in a body of water, when sediment was piling on top of one another, and as it was piling, shells must have came in between.
Please tell me what you think, and do you think my answer is correct or incorrect. If i am incorrect, please give me an explanation of the correct answer.