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Shawn P Adamo
Shawn P Adamo, CPA, Professor, CFP. CGMA, Business Consultant, Professor, PFS I have decades of experience answering these questions.
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Experience:  CPA, Professor, CFP. CGMA, Business Consultant, Professor, PFS I have decades of experience answering these questions.
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Using the geologic map of Virginia, answer the following questions: Is

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Using the geologic map of Virginia, answer the following questions:
Is the region in the extreme northwest corner to the Potomac River strongly folded or strongly faulted?
Is the region from the southeast corner to Harrison Island along the Potomac strongly folded or strongly faulted?
In the southwestern part of the map, along the Shenandoah River, the sediments are only Quaternary in age, yet they are surrounded by much older Cambrian sediments. How do you explain this?
In the southeastern corner of the map, locate Rockville and Gaithersburg. Notice that they are separated by the Plummer’s Island Fault. Is Rockville moving atop Gaithersburg or is Gaithersburg moving atop Rockville?
Find Martinsburg, WV, in the extreme northwest corner. Now locate Martinsburg, MD, which is just to the to the east of Harrison Island and Mason Island along a bend in the Potomac in the south central area of the map. Which is surrounded by the older rock?
Locate Long Marsh Run just south of the West Virginia/ Virginia border on the southwestern side of the map. Which way is it flowing?
How many different ages of rock would you encounter along its course?
In the middle image at the bottom, to the far right, you see that the younger Prettyboy Schist lies beneath the older Mather Gorge Formation. How can older rock be found atop younger rock?
Locate the oval, brown rocks near the center of the map. What geologic feature is this?
Submitted: 1 year ago.
Category: Homework
Expert:  Shawn P Adamo replied 1 year ago.
Hello. I have been writing and answering homework questions for decades.
The northwest corner is more faulted than folded, while the southeast is more folded.
The newer sediments are deposited on an older formation.
Glen Hills is on top, as indicated by the “saw teeth.”
Martinsburg, West Virginia is Upper/middle Ordovician (450 Gya) and Martinsburg, Maryland is Pleistocene (less than 2.5 Gya). The West Virginia geology is very much older.It is flowing southeast along a trace of Holocene Alluvium, the newest rock there is. The trace runs through €e, €cb, €c, Obrr, Obps, Osnr, Oc, and Om before running off the top of the map. That is a total of 8 other rock ages.
This map is of the eastern Appalachian mountains where old rock has been folded and pushed up and eroded.
This particular feature is a promontory of lower cambrian marble and quartzite called Sugarloaf Mountain.
Expert:  Shawn P Adamo replied 1 year ago.
THIS ANSWER IS LOCKED!

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