please answer all 5 questions. thank you 5. Think back to Question 3 regarding t
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please answer all 5 questions. thank you
5. Think back to Question 3 regarding the oldest unit on the map. Does your cr oss-section agree or disagree with your original interpretation? 6. How old is the granite? 7. In point form and using as much detail as possible, describe the geologic history for Map A. Map B 1. What type of geologic contact exists between the Undivided granite and gneiss unit and the Ordovician packstone to wackestone? What type of geologic contact exists between the Undivided granite and gneiss unit and the Cambrian quartz arenite? Sketch a geologic cross-section across the entire map area in a geologically appropriate orientation below the map. Hint: it is typically appropriate to draw a cross-section that is across the strike of the main geologic features in the area, e.g., bedding, faults, folds, etc. Make sure you put on the line of section on the map. Check your line of section with a TA before you sketch the section 3.Explanation / Answer
1. As we can see in the map B there is an irregular contact between the undivided granite and gneiss and ordovician wackestone to packstone. This is the non conformity that exists between the igneous rock i.e. granite and gneiss and the overlying sedimentary rock i.e. ordovician wackestone to packstone.
2. Since the contact between an igneous rock and a sedimentary rock is a non conformity. So the contact that exists between the cambrian quartz arenite which is a sedimentary rock and the undivided granite and gneiss which is an igenous will be non conformity.
4. As we can see there is a normal fault seen on the map. Since the normal fault is represented by the ball and bar symbol.
5. First there is eruption of igneous rock. After a prolonged period of erosion there is deposition of quartz arenite. After that the rock gets faulted there is deposition of packstone to wackestone.
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