Chapter 14 Structural Geology 75 * What structure is shown in Figure 14. ISB? A

Question

Chapter 14 Structural Geology 75 * What structure is shown in Figure 14. ISB? A Describe the structure shown in Figure 14. ISC Xiad of fault is shown in Figure 14.15D, and what kind of structure does the fault cut? ELLLLLLLLLLLLLLLLLL Fill in use blanks to formulate a series of rules to help in the interpretation of geologic maps and cross sections. a The following rules refer to relative ages of sedimentary beds. Choose older or younger for your answers. • When anticlines and domes are eroded, the beds exposed in the center are from the center. than the beds exposed away • When synclines and basins are eroded, the beds exposed in the center are – than the beds exposed away from the center. • On a geologic map. - beds dip under (or toward) - beds, unless they are overturned. (Hint: Look at the upper surfaces of your cut-out block diagrams or Figure 14,9.) 6 The following rules refer to beds and contacts between beds, as seen in map view. • When folds have been eroded, the contacts between beds, as seen on a horizontal surface, are straight and parallel. Choose plunging or non-plunging. • When plunging anticlines have been eroded, the contacts between beds, as seen in map view, bend so as to point _ the direction of plunge. Choose toward or away from. • When plunging synclines have been eroded, the contacts between beds, as seen on the surface, bend so as to point _ the direction of plunge. Choose toward or away from. • The outcrop width of a bed as the angle between the surface and the dip of the bed decreases. Choose increases or decreases. 8. Web extras: Inferring Structures from Geologic Maps. You can often infer the large geologic structures that dominate a state from examining the patterns formed by the rock units. Visit Chapter 14 of www.mhhe.com/jones&e; to get a taste of map reading by examining the geologic map of Ohio. Calata Cintuna Punum Cnaea Many of the websites used to help you navigate from one place to another

Explanation / Answer

when anticlines and domes are eroded the beds exposed in the center are older than the beds exposed away from the center.

when synclines and basins are eroded the beds exposed in the center are younger than the beds exposed away from the center.

on a geological map older beds dip under or toward younger bed unless overturned. (the lower the number the older is the bed ie 1is the oldest bed).

when non plunging folds have been eroded the contacts between beds as seen on a horizontal surface are straight or parallel (The hinge is the line of maximum curvature. The hinge line may be straight, in which case it forms a cylindrical fold, or it may have a plunge)

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.