![]() Instructions: Now that you possess the knowledge that you require to figure out the sequence of events, write out the lettered sequence (from oldest to youngest) below the figure. Principle of Stratigraphic Superposition. In an undisturbed sequence of rock strata, the oldest rocks are at the bottom and the youngest on top. Is this zone of contact shown in the picture? (yes or no)_ The Materials that make up sedimentary rocks are deposited in horizontal sheets which creates layers, Strata, within the Earth. Question #12: The caption describes a “zone of contact” forming as the dike intruded into the rock layers. Question #11: Is there evidence in this picture that there was another layer deposited between layer D and layer F? Explain why or why not. What might you conclude regarding their depositional history? _ Question #10: Supposed that letter B and C had the same fossil type. ![]() Question #9: Which law of geology determines which orientation letter F was deposited? _ Question #8: How do you know, based on your knowledge of unconformities, that there is not one represented in Figure 6? _ Question #7: Which letter represents a layer of shale? _ Question #6: Which type of unconformity (of the three listed in Figure 5) is shown in Figure 2? _ Which is older… the siltstone or the stream? _ Question 5: You notice at the top that the siltstone is cut by several streams. Question#2: Are the rock layers in the Figure 1 flat? Yes or No (hint: for reference, compare with the rocks in the lower part of Figure 7) This law states that, for sedimentary rock layers, these layers were originally deposited horizontal, or flat. Question #1: Which sedimentary rock layer is the oldest? _ This states that, for sedimentary rocks (those they occur in layers, like the ones above), the oldest layer is at the bottom and the youngest layer is at the top.
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