3.Ildentify the fold structure with the following characteristics by answering (

Question

3.Ildentify the fold structure with the following characteristics by answering (2 pts each) A (for anticline) or S (for syncline) a. shows the younger rocks preserved e. map view bed lines flare apart in the center of the eroded structure in the direction of plunge b. shows the older rocks preserved f. map view bed lines converge the direction of plunge in the center of the eroded structure c. involved in creating enormous g. beds dip toward the center sedimentary basins of the fold structure d. involved in creating 1 h. beds dip away from the crustal domes center of the fold structure

Explanation / Answer

3. a) S

Reason : In case of Syncline, the fold has its youngest beds towards the core of the fold and relatively older layer outwards. Thus, on erosion, in case of a syncline, the younger rocks will lie in the central portion surrounded by relatively older rocks forming an outlier.

b) A

Reason : For Anticlines, the oldest beds lie at the core of the fold which on erosion appears as an inlier where the oldest rocks lie in the center of the eroded structure with relatively younger rocks surrounding it.

c) S

Reason : Synclines are also known as elongated structural basins because they are areas of geological depressions.

d) A

Reason : Anticlines when they intersect with each other they result im the formation of domes. Domes are mainly caused by compression and successive upliftment of the crust.

e) A

Reason : In case of an anticline, the beds dip away from each other and thus in map view the bed lines flare apart in the direction of plunge.

f) S

Reason : In case of synclines, the beds dip towards each other and so the bed lines appear to converge in the direction of plunge.

g) S

Reason : In synclines, the beds dip towards the central portion of the folded structure.

h) A

Reason : In anticlines, the beds diverge or dip away from the center of the fold structure.

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