[Solution]GEOLOGICAL VISUALISATION

Question 3Look at the Box Fault at Grid reference: (515, 980) on the geological map provided. Calculate the apparent strike separation of the Swansea Two-Feet…

Question 3Look at the Box Fault at Grid reference: (515, 980) on the geological map provided. Calculate the apparent strike separation of the Swansea Two-Feet coal seam (SW2) and describe the sense of movement along the fault at this location. Explain your reasoning.

(4 marks)

Question 4In relation to the geological map provided, evaluate the following statement: ‘The fold in the southwest, cored by the Pennard Conglomerate Formation (PeC), is an antiformal syncline which plunges towards the west.’

(4 marks)

Question 5The Mississippian is a subperiod of the Carboniferous which lasted from 359 – 323 Ma. From the information recorded on geological map provided, calculate the average rate of sedimentation during the Mississippian in the map area. Write your answer in units of mm / year.

(4 marks)

Question 6Using the sketch map shown in Figure 1, calculate the dip, strike and dip direction of the prominent northwest-southeast trending Pwll Du Fault near to grid reference: 540, 940. You can assume that the fault plane has a uniform dip across the area of interest. Remember to view this map at 100% zoom.

Figure 1. Sketch map of a section of the Pwll Du Fault

(8 marks)Question 7In relation to the geological map provided, determine which side of the Bethel Fault (Grid reference: 690, 930) has been thrown down. Explain your reasoning.

(4 marks)

Question 8Using the geological map provided and your cross section, interpret the geological history of the area from the Devonian to the present day. Marks will be awarded for justifying the environments of deposition, nature of tectonic events and relative timing of periods of net erosion.

(15 marks)

Question 9Using the geological map and cross section sheet provided, produce a geological cross section between grid references: 505, 860 and 550, 970.

Your cross section should show your annotated interpretation of the subsurface geology and a reasonable continuation of the geology above the modern day ground surface. Include a scale, key and any necessary labels. Assume a flat topography.

(20 marks)
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