Exercise 10-6 FOLDS-SALEM QUADRANGLE, KENTUCKY Refer to the map in Appendix B (p
ID: 290987 • Letter: E
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Exercise 10-6 FOLDS-SALEM QUADRANGLE, KENTUCKY Refer to the map in Appendix B (p. 208). The structure contours on this map are drawn on the base of the Cypress Sandstone (Mcb). Negative values indicate elevations below sea level. 1. Is the area where IPca is exposed best described as a dome, basin, plunging anti- cline, or plunging syncline? 2. Are the rock units that are exposed outside the area bounded by faults folded? 3. What are the approximate strike and dip of the rock units located outside the fault bounded area?Explanation / Answer
1) The area where Pca is exposed is a best describes as a dome since allsides of this structure is diping away which is evident from the decreasing value of contour lines.Since the lithology and the contour are almost parallel so then the dome is non plunging.
2) yes the rock units outside the fault bounded are is foldes due to symmetrical repetition of beds .
Msgf|Msgr|Msgl|Msgr|Msgf. which is only possible if the lithology is folded.
3) Although it is complicated to get the exact strike dip of the beds without working on a hard copy of the map.
but most of the beds are sub-horizontal to horizontal as the lithology or rock units are parallel to the contour lines without crosscutting it.
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