Units become younger toward the center of a syncline, but older toward the cente

Question

Units become younger toward the center of a syncline, but older toward the center of an anticline.

      
The layers bend around an anticlne more abruptly than they do around a syncline.

      
Anticlines are always on the north side of synclines.

      
You cannot tell an anticline from a sncline on a geologic map.

Which of the following formations is most resistant to weathering and erosion?

Benner-Loysburg Formation

      
Juniata Formation

      
Bellafonte Formation

      
Coburn-Nealmont Formation

On SILURIAN Obl Ocn Sc 20 Oa Clinton Group Obe Ob St Tuscarora Fm. St ORDOVICIAN 19 Juniata Fm. 23 Obe 20 Bald Eagle Fm. Oc Reedsville Fm. obl Ocn Coburn-Nealmont Fms. Obe Obe Obl Benner Loysburg 20 Fms. Obe Obf 20 Bellafonte Fm. Ocn Oa 25 Axe mann Fm. St 20 On Ob Nittany Fm. 1 mile FIGURE 13.1 Geological map of the Mill Hall region of Pennsylvania showing the relationship of geology and topography.

Explanation / Answer

1) The layers bend around an anticlne more abruptly than they do around a syncline. Because here the dip of the beds are very steep around anticline here.

2) Juniata Formation is more resistant to weathering because this formation is existed under the Benner-Loysburg Formation and Coburn-Nealmont Formation. Other Bellafonte Formation is exposed to weather.

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