LOCATION: Approximately 1 mile south of the business district of Jim Thorpe on Mauch Chunk Ridge; within Flagstaff Mountain Park.
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.
LOCATION: A gap in Blue Mountain approximately 1 mile south of the Borough of Palmerton.
REMARKS: A magnificent water gap in Blue Mountain. Erosion by the Lehigh River over millions of years brought the gap to its present elevation. A nearly continuous rock sequence from the top of the Martinsburg Formation (Ordovician age) to the Middle Silurian can be seen along the east bank of the river; it is the "type section" of the Lizard Creek Member of the Shawangunk Formation (Lower Silurian).
LOCATION: The Lehigh River between White Haven and Jim Thorpe.
REMARKS: One of the prime natural areas of eastern Pennsylvania; it is wild and remote. The gorge is extremely rugged and has a very precipitous east wall near Jim Thorpe; Glen Onoko (243) is a steep-walled canyon of uncut timber and spectacular waterfalls.
LOCATION: Approximately 10 miles southeast of White Haven along Pa. Route 534.
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.
LOCATION: In the village of Split Rock.
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.
LOCATION: A 9.7-mile-long ridge between the village of Ashfield (west of the Lehigh River) and Little Gap (east of the Lehigh River).
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.
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