Geological Mapping — DU B.Sc. (Hons.) Geology Previous Year Question Papers

(b) Identify and briefly discuss about th`e fold geometry with help of neat and well-labelled sketch. (10) Use suitable and labelled diagrams wherever required. 1. (a)Describe th'e important components of a topographic map. (b) What is the meaning and significance of scale in geological/topographic mapping? (c) How do the contours help ip providing crucial information about the topography? 2. (a) What are the importaht characteristics of rocks that help in their identification in the field and in the lab? (b) Describe a litholog and its significance. What are the various steps in the preparation of a litholog? (c) How does the `rule of V' help in outcrop interpretation? 3. (a). Define the attitudes of an inclined planar structure. (b) Explain the trend, plunge, and pitch of a given linear structure with the hel_p of a diagram. (c) How does the Global Positioning System work, and what is its use in geological mapping? 4. (a) How can the omission and repetition of beds observed on a geological map be interpreted in terms of faulting and folding? Explain with help of suitable diagrams and examples. (b) An upright, non-plunging, cylindrical fold is exposed in an area.. With respect to its geometry, define the following terms : (i) Axial plane (ii) Fold axis (iii) Profile plane (iv) Interlimb angle 5. Duri.ng the fieldwork, the collected structural data of folded strata froni two outcrop locations is represented by'stereonet (i) and (ii) below. For each stereonet:. (a) Specify the attitude of fold axis and the axial plane. (5)