REMARKS: Huge, highly crossbedded sandstone blocks have been frost-wedged from the bedrock, forming a small "rock city." The Homewood Sandstone Member (Curwensville Formation, Pottsville Group, Pennsylvanian age) is exposed in a single bed 20 to 25 feet thick. Joint separations vary from a few inches to as much as 15 to 20 feet; chambers have vertical walls 15 to 25 feet in height, connected by narrow passageways of the same height and from 15 inches to 3 feet in width; some of these narrow passageways are 50 feet long.
REFERENCE: Ashley, G. H. (1940), Geology and mineral resources of the Curwensville quadrangle, Pennsylvania Geological Survey, 4th ser., Atlas 75, p. 38.
REMARKS: A unique meander of Mosquito Creek resembles a bizarre human elbow.
REMARKS: A tough, hard, resilient sandstone near the top of the Allegheny Group (Pennsylvanian age) caps these knobs. This high elevation (2346 feet above sea level), due to the weather-resistant character of the rock, provides an excellent view of the topographic transition area between the Pittsburgh Plateaus and Allegheny High Plateaus sections.
REMARKS: A"Rock City" in the Homewood Sandstone Member of the Curwensville Formation (Pottsville Group, Pennsylvanian age) "Streets" owe their origin to rock fractures that have been enlarged by weathering.