Stratigraphic analysis is about trying to understand the chronological order in
ID: 230947 • Letter: S
Question
Stratigraphic analysis is about trying to understand the chronological order in which features and strata were deposited. Your task for this exercise is to place the letters (representing the strata and features they label) in stratigraphic order. Be aware that some of the letters will represent features and strata that may have been deposited at the same time (contemporaneous), or that you will be unable to understand association among certain features and strata due to the fact that they are not stratigraphically connected in the profile.Explanation / Answer
By the principle of lateral continuity, it is clear that the layer O is formed horizontally and extended in all directions. Later on it was separated by a valley like feature may be due to erosion. Before the formation of layer O, M is formed and is shown as inclusion. According to principle of inclusion, M is older than layer O. After the process of erosion of layer O, some material was deposited and formed a layer N. According to law of superposition, layers L and K are younger than layer N. Layer K got erosion and gets deposited with material J. Hence, J is younger than K. According to principle of inclusion, H is younger than G. G is younger than J. D and F cannot be predicted since they are not positioned as per chronological order. I and E might be deposited one as well as B and C also. According law of superposition, layer A at the top is younger than all the layers. Order of depositions from older to younger is M. O, N. L, K, J, H, G, E=I, B=C, and A.