Ticklish Rock is an unusual sandstone rock formation, located in Shrewsbury Township, Sullivan County, Pennsylvania. The brown and green sandstone formation, which stands at the edge of a steep cliff and resembles an upright hammer, consists of a large horizontal block, 3 feet high, 8 feet long, and 6 feet wide (0.9 x 2.4 x 1.8 m), balanced upon a thin, 18 in × 30 in (46 cm × 76 cm) pedestal.
Sandstone is a clastic sedimentary rock composed mainly of sand-sized mineral particles or rock fragments.
An outcrop or rocky outcrop is a visible exposure of bedrock or ancient superficial deposits on the surface of the Earth.
Shrewsbury Township is a township in Sullivan County, Pennsylvania, United States. The population was 319 at the 2010 census.
Ticklish Rock is part of Pennsylvania's Catskill Formation, which was formed during the Devonian period. The outcrop itself is the result of more recent uneven weathering, which removed all but the pedestal from under the block.
The Devonian Catskill Formation or the Catskill Clastic wedge is a unit of mostly terrestrial sedimentary rock found in Pennsylvania and New York. Minor marine layers exist in this thick rock unit. It is equivalent to the Hampshire Formation of Maryland, West Virginia, and Virginia.
The Devonian is a geologic period and system of the Paleozoic, spanning 60 million years from the end of the Silurian, 419.2 million years ago (Mya), to the beginning of the Carboniferous, 358.9 Mya. It is named after Devon, England, where rocks from this period were first studied.
Weathering is the breaking down of rocks, soil, and minerals as well as wood and artificial materials through contact with the Earth's atmosphere, water, and biological organisms. Weathering occurs in situ, that is, in the same place, with little or no movement, and thus should not be confused with erosion, which involves the movement of rocks and minerals by agents such as water, ice, snow, wind, waves and gravity and then being transported and deposited in other locations.
A block of flat-lying, brown and green sandstone (Catskill Formation, Devonian age), 3 by 8 feet in cross section, 6 feet thick, resting on a pedestal that is 18 by 30 inches. The outcrop is on the rim of the Allegheny Ridge; an excellent example of differential weathering.
Sullivan County is a county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 6,428, making it the second-least populous county in Pennsylvania. Its county seat is Laporte. The county was created on March 15, 1847, from part of Lycoming County and named for Charles C. Sullivan, leader of the Pennsylvania Senate at that time.
The Old Red Sandstone is an assemblage of rocks in the North Atlantic region largely of Devonian age. It extends in the east across Great Britain, Ireland and Norway, and in the west along the northeastern seaboard of North America. It also extends northwards into Greenland and Svalbard. In Britain it is a lithostratigraphic unit to which stratigraphers accord supergroup status and which is of considerable importance to early paleontology. For convenience the short version of the term, ORS is often used in literature on the subject. The term was coined to distinguish the sequence from the younger New Red Sandstone which also occurs widely throughout Britain.
Hickory Run State Park is a 15,990-acre (6,471 ha) Pennsylvania state park in Kidder and Penn Forest Townships in Carbon County, Pennsylvania in the United States. The park is spread across the Pocono Mountains. The park is easily accessible from Interstate 476 and Interstate 80.
Little Pine State Park is a Pennsylvania state park on 2,158 acres (873 ha) in Cummings Township, Lycoming County, Pennsylvania in the United States. Little Pine State park is along 4.2 miles (6.8 km) of Little Pine Creek, a tributary of Pine Creek, in the midst of the Tiadaghton State Forest. A dam on the creek has created a lake covering 94 acres (38 ha) for fishing, boating, and swimming. The park is on Pennsylvania Route 4001, 4 miles (6.4 km) northeast of the unincorporated village of Waterville or 8 miles (13 km) southwest of the village of English Center. The nearest borough is Jersey Shore, Pennsylvania, about 15 miles (24 km) south at the mouth of Pine Creek on the West Branch Susquehanna River.
The Devonian Hamilton Group is a mapped bedrock unit in the United States. The unit is present in New York, Pennsylvania, Maryland, Ohio and West Virginia. In Virginia, it is known as the laterally equivalent Millboro Shale. The group is named for the village of Hamilton, New York. Details of stratigraphic nomenclature for this unit as used by the U.S. Geological Survey are available on-line from the National Geologic Map Database. These rocks are the oldest strata of the Devonian gas shale sequence.
The Huntley Mountain Formation is a late Devonian and early Mississippian mapped bedrock unit in Pennsylvania, in the United States.
The Lock Haven Formation is a Devonian mapped bedrock unit in Pennsylvania, in the Appalachian Mountains of the United States.
The Bedford Shale is a shale geologic formation in the states of Ohio, Michigan, Pennsylvania, Kentucky, West Virginia, and Virginia in the United States.
There are 24 named waterfalls in Ricketts Glen State Park in the U.S. state of Pennsylvania along Kitchen Creek as it flows in three steep, narrow valleys, or glens. They range in height from 9 feet (2.7 m) to the 94-foot (29 m) Ganoga Falls. Ricketts Glen State Park is named for R. Bruce Ricketts, a colonel in the American Civil War who owned over 80,000 acres (32,000 ha) in the area in the late 19th and early 20th centuries, but spared the old-growth forests in the glens from clearcutting. The park, which opened in 1944, is administered by the Bureau of State Parks of the Pennsylvania Department of Conservation and Natural Resources (DCNR). Nearly all of the waterfalls are visible from the Falls Trail, which Ricketts had built from 1889 to 1893 and which the state park rebuilt in the 1940s and late 1990s. The Falls Trail has been called "the most magnificent hike in the state" and one of "the top hikes in the East".
The New Albany Shale is an organic-rich geologic formation of Devonian and Mississippian age in the Illinois Basin of the United States. It is a major source of hydrocarbons.
The Ridgeley sandstone is a sandstone or quartzite of Devonian age found in the Appalachian Mountains of Pennsylvania, Maryland, West Virginia, and Virginia, United States. The Ridgeley is fine-grained, siliceous, calcareous in its lower strata, sometimes fossiliferous, and sometimes locally pebbly or conglomeritic. Varying in thickness from 12 to 500 feet, this rock slowly erodes into white quartz sand that often washes or blows away, but sometimes accumulates at large outcrops. When freshly broken, the rock is white, but outcrop surfaces are often stained yellowish by iron oxides.
Mugser Run is a 8.0-mile-long (12.9 km) stream in Columbia County, Pennsylvania, in the United States. It is a tributary of South Branch Roaring Creek. Mugser Run is located in Locust and Cleveland Townships. Forested land and agricultural land are by far the most common uses of land in the watershed. Brown trout and rainbow trout are found in the creek. The main rock formations are the Trimmers Rock Formation and the Catskill Formation–Buddys Run formation.
West Creek is a tributary of Fishing Creek, in Columbia County and Sullivan County, in Pennsylvania, in the United States. It is 9.1 miles (14.6 km) long and flows through Davidson Township in Sullivan County and Jackson Township, Sugarloaf Township, Benton Township, and Benton in Columbia County. The water temperature of the creek ranges from 0 °C (32 °F) to 25 °C (77 °F). The discharge ranges from 0 to nearly 10 cubic meters per second. Rock formations in the watershed include the Trimmers Rock Formation, the Catskill Formation, and the Huntley Mountain Formation. The creek's watershed has an area of 16.6 square miles, most of which is agricultural, forested, or urban land. A small number of dams, mills, and schoolhouses were built on West Creek in the 19th and early 20th century. West Creek has the highest level of biodiversity of any stream in the upper Fishing Creek watershed.
Lead Run is a tributary of East Branch Fishing Creek in Sullivan County, Pennsylvania. It is approximately 1.5 miles (2.4 km) long and flows through Davidson Township. Its watershed has an area of 0.82 square miles (2.1 km2). The stream has a low pH and poor water quality, although that could potentially be remedied. The main rock formations in the area are the Catskill Formation, the Huntley Mountain Formation, and the Burgoon Sandstone. The main soil associations in the vicinity of the stream are the Deep-Wellsboro-Oquaga association, the Norwich association, and the Oquaga association.
Trout Run is a tributary of East Branch Fishing Creek in Sullivan County, Pennsylvania, in the United States. It is approximately 1.5 miles (2.4 km) long and flows through Davidson Township. The watershed of the stream has an area of 0.62 square miles (1.6 km2). The stream is acidic and is considered by the Pennsylvania Department of Environmental Protection to be impaired by atmospheric deposition and metals. Rock formations in the watershed include the Catskill Formation and the Huntley Mountain Formation. Soils in the watershed include the Deep-Wellsboro-Oquaga and Oquaga soil associations.
Big Run is a tributary of East Branch Fishing Creek in Sullivan County, Pennsylvania, in the United States. It is approximately 2.4 miles (3.9 km) long and flows through Davidson Township. Its watershed has an area of 1.38 square miles (3.6 km2). The stream has a low pH and poor water quality, although that could potentially be remedied. The main rock formations in the area are the Catskill Formation, the Huntley Mountain Formation, and the Burgoon Sandstone. The main soil associations in the vicinity of the stream are the Deep-Wellsboro-Oquaga association, the Oquaga association, and the Norwich association.
Pigeon Run is a tributary of Sullivan Branch in Sullivan County, Pennsylvania, in the United States. It is approximately 1.3 miles (2.1 km) long and flows through Davidson Township. Its watershed has an area of 0.78 square miles (2.0 km2). The stream has a low pH and sometimes has poor water quality, although that could potentially be remedied. The main rock formations in the area are the Catskill Formation, the Huntley Mountain Formation, and the Burgoon Sandstone. The main soil associations in the vicinity of the stream are the Deep-Wellsboro-Oquaga association, the Norwich association, the Morris association, and the Oquaga association.
Hunts Run is a tributary of Sullivan Branch in Sullivan County, Pennsylvania, in the United States. It is approximately 0.5 miles (0.80 km) long and flows through Davidson Township. Its watershed has an area of 0.40 square miles (1.0 km2). The stream has a low pH and poor water quality. The main rock formations in the area are the Huntley Mountain Formation, and the Burgoon Sandstone. The main soil associations in the vicinity of the stream are the Deep-Wellsboro-Oquaga association, the Morris association, and the Oquaga association.
The Exmoor Group is a late Devonian to early Carboniferous lithostratigraphic group in southwest England whose outcrop extends from Croyde in north Devon east across Exmoor to Minehead in west Somerset. The group comprises the following formations the:
Pennsylvania Department of Internal Affairs (1939), Ticklish Rock - One of State's curious formations, Pennsylvania Department of Internal Affairs Monthly Bulletin 7, no. 11, p. 3-4.
A geographic coordinate system is a coordinate system that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are often chosen such that one of the numbers represents a vertical position and two or three of the numbers represent a horizontal position; alternatively, a geographic position may be expressed in a combined three-dimensional Cartesian vector. A common choice of coordinates is latitude, longitude and elevation. To specify a location on a plane requires a map projection.
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