Understanding Lower Neshaminy Creek Direction Change and Barbed Tributary Evidence, Bucks County, Pennsylvania, USA
Eric Clausen

Neshaminy Creek is located in southeast Pennsylvania (USA) and flows in a southeast direction through a series of incised meanders roughly parallel to the nearby southeast-oriented Delaware River before turning to flow in southwest, south, northeast, and south directions before reaching the Delaware River, which has also abruptly turned to become a southwest-oriented river. Throughout their parallel southeast-oriented courses northeast-oriented barbed tributaries join both the Delaware River and Neshaminy Creek and shallow northeast- to southwest-oriented through valleys cross the Delaware River-Neshaminy Creek drainage divide. These drainage features formed when massive southwest-oriented floods of possible glacial melt water origin flowed across southeast Pennsylvania. The deep southwest-oriented Delaware River channel segment first eroded headward along what was probably a major southwest-oriented flood flow channel and the southeast-oriented Neshaminy Creek valley then eroded headward from it to capture southwest-oriented flood flow with the southeast-oriented Delaware River valley segment next eroding headward across the same southwest-oriented flood flow. Northeast-oriented (and barbed) Neshaminy Creek and Delaware River tributaries and the northeast-oriented Neshaminy Creek channel segment were developed by reversals of flow on northeast ends of beheaded southwest-oriented flood flow channels.

Full Text: PDF     DOI: 10.15640/jges.v5n2a1