Multiple wind gaps (or water-eroded notches) carved in the West Branch Chester Creek-Brandywine Creek divide east and south of Chadds Ford, PA and north of the Delaware border provide evidence that multiple channels of flood flow moved in a southwest direction to the south oriented Brandywine Creek valley prior to headward erosion of the east, […]
Archives for August, 2015
The Paoli-Thorndale Regional Rail Line is unique among the SEPTA Regional Rail Lines in that between Ardmore and Malvern it follows the Schuylkill-Delaware River drainage divide and further west crosses the Schuylkill-Delaware River divide along the Chester Valley south wall. The Paoli-Thorndale Regional Rail Line, which was originally the Pennsylvania Railroad main line and which […]
Overview: Along its 34.4-mile trip from Center City Philadelphia to Doylestown a SEPTA train travels from the Philadelphia City Center to and then along the Coastal Plain-Piedmont Province boundary before moving from the Coastal Plain onto the Piedmont to reach the Tookany Creek drainage basin. Once in the Tookany Creek valley the train travels in […]
Phillylandforms.info 