Chimney Rocks EarthCache

Chimney Rocks is a natural wonder. The wall of rock was where signal fires of Indians burned messages to the warriors in the valley below. Local lore claims the chief of the local Native American tribe would sit in this area and view his tribe. 
A bronze marker was placed on the Pulpit Rock, on October 17, 1924. Now known as the "Look Out".

Chimney Rocks is an outstanding outcrop of towers of limestone. The rocks are beds of the Tonoloway and Keyser Formations and part of the western flank of Catfish Ridge. The ridge is mainly supported by the Keyser Formation, a limestone that is slightly more resistant than the Tonoloway Formation, and which makes up the base of the ridge. A small vertical fault is the primary cause for the development of the chimneys. 
Northeast trending joints, which have enlarged by dissolution of limestone, also have contributed to the isolation of the chimneys. The Keyser Formation is noticeably fossiliferous, including crinoids, corals, brachiopods, bryozoans, and stromatoporoids.

In addition, Chimney Rocks provides a scenic view of Hollidaysburg and its setting in the Ridge and Valley Province. 
In the distance, the imposing wall of the Allegheny Front rises to the north. This marks the boundary between the Ridge and 
Valley and the Appalachian Plateaus physiographic provinces. 

To claim this earthcache email the answers to the following questions.

1. In which physiographic province can Chimney Rocks be found?

2. What is the imposing wall to the north?

3. What colors are the rocks forming the chimneys?

4. What factors help form the spires.