While not usually described as gorges the Philadelphia area contains numerous narrow stream and river valleys which for all practical purposes should be called gorges. Most Philadelphia area gorges are 350 feet or less in depth and have been eroded into erosion resistant metamorphic and sedimentary rocks. Some Philadelphia area gorges now serve as major […]
Tag archives for Schuylkill River
This is the second essay in which Philadelphia area drainage systems and erosional landforms as seen on detailed topographic maps are viewed as pieces of a solvable puzzle. The puzzle solution assumes running water carved the landscape features and the puzzle problem is to determine how running water accomplished that task. Each essay presents one […]
Philadelphia area drainage systems and erosional landforms when viewed on detailed topographic maps can be considered to be pieces of a giant puzzle, which if properly assembled tells how the regional landscape was formed. The topographic maps which can be obtained from the United States Geological Survey National Map and TopoView websites provide a big […]
Introduction: Gulph Creek is a Schuylkill River tributary located in the region where Chester, Delaware, and Montgomery Counties meet. Gulph Creek is only about six miles long from its head on the Schuylkill River-Delaware River drainage divide to its mouth where the creek flows into the Schuylkill River and drains an area of approximately six […]
Mill Creek originates just north of the Villanova University campus and flows in an east direction along the north sides of the Rosemont College and Bryn Mawr campuses until it turns to flow in an east-southeast and a south-southeast direction before making an abrupt turn to flow in a northeast direction to join the southeast […]
The Schuylkill River between Phoenixville and Norristown makes several remarkable direction changes including two complete U-turns just upstream from Valley Forge National Historical Park. Other interesting Schuylkill River U-turns or perhaps incised meanders are found between Pottstown and Phoenixville, although this essay will focus on the U-turns between Phoenixville and Valley Forge National Historical Park. […]
The Marble Hall Through Valley between Spring Mill Creek and Wissahickon Creek is one of several through valleys linking the Wissahickon Creek valley upstream from the Wissahickon Gorge with the Schuylkill River valley and is located in Marble Hall between Lafayette Hill and Barren Hill. Wissahickon Creek flows in a south direction at the through […]
The Whitemarsh Through Valley between Plymouth Creek and Wissahickon Creeks is one of several low elevation through valleys linking the Wissahickon Creek valley upstream from Wissahickon Gorge with the Schuylkill River and is a west to east oriented valley underlain by easily eroded bedrock and bounded on the south by an erosion resistant upland and […]
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