GEOL 207 Final, Spring 2000

American University of Beirut Department of Geology Geol 207 Map Interpretation Final Exam NAME: Spring 2000 (25 points) — 1. (7 points) A. Label (name) the parts shown by the arrows. (3 points) B. Use diagrams to show how folds are produced by crustal forces. (10 points) = C. (2 points) a. Define the term “fold attitude”. b. Sketch diagrams for all possible fold attitudes. Clearly label your diagrams. (8 points) (5 points) D. Calculate the dip angle of the bed shown below. Loree le 4 = Aoom Elevedien in meters Cams£) Write your interpretation on the back of this page. (20 points) 2. Interpret the geological history of the area shown by the map below. Succession (not fo scale) 7 Red Beds Coal Measures Millstone Grit : 152 _ Yoredale Beds Great Scar Limestone Basal Conglomerate Silurian i Ordovician Ingletonian (tightly folded anticlines and | QO 1 2 3 4 Skin } | { J wt waned A Craven Faults S oN Yoredale R.Greta RUoe} } Great Scar Beds Millstone | Red} ! Limestone . \ Grit 1 ! Ingletonian synclines) B Millstone Grit | 800m 600 400 200 OD. 200 400 (20 points) 3. The map below shows the top ele several boreholes. Construct contour interval of 50 meters vation (in meters, amsl) ofa geological unit measured at a structure contour map for the top of the unit. Use a and start_with contour line 150m. (20 points) 4. The map below shows a fault at an clevation of 30 meters amsl, and elevations (amsl) of a thin bed recorded at six borcholes. Calculate the throw of the fault. & _. WADE = 48 bom o K om “Jom bow Seale 1: /00oco (15 points) 5. (10 points) A. The map below is for a horizontal ground at an elevation of 21 meters amsl. Draw a cross-section along AB and determine the throw of the fault. Do not use vertical exaggeration. (5 points) B. Explain how an angular unconfomnity is formed. Support your answer with diagrams.