Rock Run (Martins Creek tributary) facts for kids

Quick facts for kids Rock Run
Rock Run
Country	United States
State	Pennsylvania
County	Bucks
Township	Lower Makefield Falls
Physical characteristics
Main source	150 feet (46 m) 40°12′24″N 74°50′38″W / 40.20667°N 74.84389°W / 40.20667; -74.84389
River mouth	33 feet (10 m) 40°10′36″N 74°48′39″W / 40.17667°N 74.81083°W / 40.17667; -74.81083
Length	4.81 miles (7.74 km)
Basin features
Progression	Rock Run → Martins Creek → Delaware River → Delaware Bay
River system	Delaware River
Basin size	4.87 square miles (12.6 km2)
Bridges	Stony Hill Road David Terrace Esther Lane Derbyshire Road Makefield Road Big Oak Road Kent Drive Valley Road Alden Avenue West Trenton Avenue Pine Grove Road U.S. Route 1 (Lincoln Highway) SEPTA Railroad Newbold Road Tyburn Road
Slope
24.32 feet per mile (4.606 m/km)

Rock Run is a tributary of Martins Creek in Lower Makefield Township in Bucks County, Pennsylvania in the United States.

Statistics

Rock Run was entered into the Geographic Names Information System of the U.S. Geological Survey on 2 August 1979 as identification number 1185276. It is also listed in the Pennsylvania Gazatteer of Streams as identification number 02922.

Course

Rock Run rises near Big Oak Road and Stony Hill Road in the southern portion of Lower Makefield Township at an elevation of approximately 150 feet (46 m) and is generally east oriented until river mile 2.87 where it makes a 90° turn to the right flowing south as it receives a tributary from the left. After about a mile it then turns east, then south and southwest until it discharges at Martins Creek's 3.20 river mile.

Geology

• Atlantic Plain
  • Atlantic Coastal Plain Province
    • Lowland and Intermediate Upland Section
      • Trenton Gravel
      • Pensauken and Bridgeton Formations

Rock Run rises in the Felsic Gneiss formation laid during the Precambrian, light buff to pink and medium to fine grained rock, mineralogy includes quartz, microcline, pyroxene, and biotite. As it flows east, it runs into the Pensauken and Bridgeton Formations laid down during the Tertiary period, yellow to reddish brown feldspathic quartz sand, coarse gravel, and boulder. Then it finally flows into the Trenton Gravel Formation from the Quaternary, consisting of feldspathic quartz sand which is reddish brown, yellow, and white, with some beds of gravel.

Crossings and Bridges