Hollow Run (Cooks Creek tributary) facts for kids
Quick facts for kids Hollow Run |
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 Hollow Run
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| Country | United States |
| State | Pennsylvania |
| County | Bucks |
| Township | Durham |
| Physical characteristics | |
| Main source | 618 feet (188 m) 40°32′50″N 75°13′44″W / 40.54722°N 75.22889°W |
| River mouth | 203 feet (62 m) 40°34′27″N 75°13′42″W / 40.57417°N 75.22833°W |
| Length | 2.18 miles (3.51 km) |
| Basin features | |
| Progression | Hollow Run → Cooks Creek → Delaware River → Delaware Bay |
| River system | Delaware River |
| Bridges | Gallows Hill Road, Lehnenberg Road, Pennsylvania Route 212 (Durham Road), Old Philadelphia Road |
Hollow Run is a small stream, also called a tributary, located in Durham Township, Bucks County, Pennsylvania. It flows into a larger stream called Cooks Creek. Cooks Creek then flows into the Delaware River, which eventually reaches the Delaware Bay.
About Hollow Run
Hollow Run is a stream that is completely within Durham Township. The U.S. Geological Survey (USGS) officially recognized it in 1990.
The stream starts at a high point of about 618 feet (188 m) above sea level. It then flows downhill to meet Cooks Creek at an elevation of about 203 feet (62 m). Hollow Run is about 2.18 miles (3.51 km) long. This means it drops about 190 feet for every mile it travels.
Where Hollow Run Flows
Hollow Run begins on the eastern side of Buckwampum Hill. It first flows north for a short distance. Then, it turns northeast before curving back to the north.
About 1.43 miles from its end, another small stream joins Hollow Run from the left side. At this point, Hollow Run suddenly turns northeast again. A little further, at 1.25 miles from its end, the stream flows through a pond or a small reservoir created by a dam.
After leaving the pond, another stream joins Hollow Run from the right side, about 1.05 miles from its end. From there, Hollow Run generally flows north until it reaches Cooks Creek. It joins Cooks Creek about 2.42 miles from where Cooks Creek itself ends.
The Rocks Along the Stream
The area around Hollow Run has interesting rock formations. Where Hollow Run starts, on Buckwampum Hill, the rocks are part of the Quartz Fanglomerate formation. These rocks formed during the Jurassic and Triassic periods. They are made of large, rounded cobbles and boulders of quartzite, sandstone, quartz, and metarhyolite, often in red sand.
As Hollow Run flows north, it passes through an older rock formation from the Precambrian time. This area has Hornblende and Gneiss rocks, which also contain a mineral called labradorite.
Closer to where it meets Cooks Creek, Hollow Run flows over the Hardyston Formation. These rocks are from the Cambrian period. They are mostly quartzite and feldpathic sandstone. Sometimes, you can find quartz pebbles in these rocks. They are also a bit porous, meaning they have tiny holes, and contain iron-rich minerals.
Bridges Over Hollow Run
Several roads cross over Hollow Run:
- Gallows Hill Road
- Lehnenberg Road
- Pennsylvania Route 212 (Durham Road)
- Old Philadelphia Road
