Answer to Question 1
Answer: The blue rock units labeled C are the oldest. These strata would have originally been deposited horizontally and then were folded, presumably during a compressional episode of mountain building. A period of erosion followed, and the ancient mountain belt was ground down to its roots. Deposition of the strata of unit B followed next, so the contact between C and B is an angular unconformity. Sometime later, igneous unit A intruded into both C and B as magma. The aureole of contact metamorphism that surrounds A shows that A must be younger than the units it cuts across. The surface of B was subject to erosion, and unit D filled a large concave gouge that was cut downward into B, perhaps an ancient river channel? (Technically, we cannot tell whether unit D was incised into B first, or whether unit A intruded first, because they have no direct or indirect relationship to one another.) Unit igneous F then cut across all units on its way up to the surface as a dike. Note that dike F has baked the units it cuts across (A, B, and D) with contact metamorphism. When it got to the surface, it erupted as a volcano. This volcano, as well as units B and D, was eventually buried underneath another batch of strata. The various layers of E were deposited next, covering everything that came before. Finally, the fault marked G cut through, offsetting portions of B, D, and E with apparent normal dip-slip motion.
Answer to Question 2
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