REMARKS: One of the most spectacular views in Pennsylvania. Folded ridges adn valleys cut by the Lehigh River result in wild and scenic gorges. The overlook owes its origin to large outcrops of Catskill sandstone and conglomerate (Devonian age) in Mauch Chunk Ridge.
REFERENCES: Epstein, J. B., Sevon, W. D., and Glaeser, J. D. [1974], Geology and mineral resources of the Lehighton and Palmerton quadrangles, Carbon and Northampton Counties, Pennsylvania, Pennsylvania Geological Survey, 4th ser., Atlas 195cd, 460 p.
REMARKS: One of the most striking geologic features in the state; the boulder field has remained relatively unchanged for more than 20,000 years. It measures about 400 feet by 1800 feet and is at least 12 feet deep. This feature is the largest of its kind in the Appalachian Mountains of the eastern United States, and is a registered National Natural Landmark.
REFERENCES: Geyer, A. R. [1969], Hickory Run State Park: Boulder field, Pennsylvania Geological Survey, 4th ser., Park Guide 2.
Sevon, W. D. [1969], Sedimentology of some Mississippian and Pleistocene deposits of northeastern Pennsylvania, in Subitzky, Seymour, ed., Geology of selected areas in New Jersey and eastern Pennsylvania and guidebook of excursions, Geological Society of America Annual Meeting, New Brunswick, N. J., Rutgers University Press, p. 214-234.
Smith, H. T. U. [1953], The Hickory Run Boulder Field, Carbon County, Pennsylvania, American Journal of Science, v. 251, p. 625-642.
REMARKS: A unique occurrence of the Duncannon Membe of the Catskill Formation (Devonian age). A large outcrop of steeply dipping, red quartzitic sandstone about 25 feet high is separated by a 5- to 56foot split (joint separation). The occurrence is unique in northeastern Pennsylvania and the outcrop itself is a anomalous because of the steep bedding dip.
REFERENCES: Sevon, W. D. [1975], Geology and mineral resources of the Hickory Fun and Blakeslee quadrangles, Carbon and Monroe Counties, Pennsylvania, Pennsylvania Geological Survey, 4th ser., Atlas 194cd.
REMARKS: A 100-foot-thick ridge of hard white sandstone, devoid of soil and tree cover, stands like a jagged "wall." The sandstone is highly fractured (jointed), and weathering has produced a myriad of "stone figures" silhouetted against the sky. This feature is also known asa Rocky Ridge and Devils Wall.
REFERENCES: Epstein, J. B., Sevon, W. D., and Glaeser, J. D. [1974], Geology and mineral resources of the Lehighton and Palmerton quadrangles, Carbon and Northampton Counties, Pennsylvania, Pennsylvania Geological Survey, 4th ser., Atlas 195cd, 460 p.
Leslie, J. P. [1892], A summary description of the geology of Pennsylvania, Pennsylvania Geological Survey, 2nd ser., 1892 Summary Final Report, v. 2, p. 721-1128.