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. Is this zone of contact shown in the picture? (yes or no)_ ![]() 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? _ A geologic feature such as a fracture or igneous intrusion is youngerin age than any rock unit or feature that it cuts across. Question #7: Which letter represents a layer of shale? _ In an undisturbed sequence of sedimentary rock layers, the layer on the bottom is the olderin terms of relative age, whereas the layer on the top is the youngest. ![]() 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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