A well defined northeast-to-southwest oriented through valley links the northwest oriented Deer Run valley with the southwest oriented East Branch Perkiomen Creek valley. The Deer Run valley drains to southeast, east, and south oriented Tohickon Creek, which flows to the southeast oriented Delaware River and the East Branch Perkiomen Creek drains to south and southwest […]
Archives for February, 2015
Morris Run is an East Branch Perkiomen Creek tributary located between Perkasie and Dublin in Bucks County and originates as a northeast oriented stream before turning in north, west, north, and northwest directions to join southwest oriented East Branch Perkiomen Creek. Most Morris Run tributaries flow in southwest directions to join north oriented Morris Run […]
Shallow wind gaps in Souderton and Telford area link headwaters of northeast and southwest oriented Perkiomen Creek tributaries and provide evidence of what were diverging and converging flood flow channels. Evidence of former channels include the present day southwest oriented East Branch Perkiomen Creek valley, a shallow wind gap in Telford linking a northeast oriented […]
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 Valley Forge National Historical Park is located south of a northeast oriented Schuylkill River segment and at the east-northeast end of the ridge forming the Chester Valley west-northwest margin. Mount Joy in the Valley Forge Park is where the high ridge ends and west of the Mount Joy the ridge segments are named Mount […]
The Chester Valley is a narrow lowland extending from near the southeast oriented Susquehanna River valley in an east-northeast direction almost to the southeast oriented Schuylkill River valley. The Pennsylvania Geologic Survey web applications map shows the Chester Valley to be underlain by easily eroded carbonate rocks. The Chester Valley north rim (North Valley Hills) […]
Christiana is a small community located about 50 miles west of Philadelphia and just north of a water gap where East Branch Octoraro Creek headwaters cross the North Valley Hills. South of that water gap the East Branch Octoraro Creek flows across the east-northeast oriented Chester Valley and then flows through another water gap as […]
While there is no common point the Susquehanna, Delaware, and Schuylkill River drainage basins are very close to each other in the Honey Brook Basin, which is located between Welsh Mountain and the Baron Hills. Pequea Creek originates in the Honey Brook Basin and after flowing in a southeast direction turns to flow in a […]
The Honey Brook basin as defined here is located between Welsh Mountain and the Baron Hills and serves as the headwaters region for the East and West Branches of Brandywine Creek, the South Branch of French Creek, and Pequea Creek with Brandywine Creek flowing to the Delaware River, French Creek to the Schuylkill River, and […]
The East and West Branches of Brandywine Creek both originate in the area east of Honey Brook and between Welsh Mountain and the Baron Hills. From their common headwaters area the two streams diverge to take completely different south oriented routes to cross the east-northeast oriented Chester Valley and to carve separate narrow and deep […]
Pequea Creek originates on the Welsh Mountain southeast flank and flows in a southeast direction before turning to flow in a west and southwest direction to eventually join the Susquehanna River. The West Branch Brandywine Creek also originates along the Welsh Mountain southeast flank, although east of the Pequea Creek headwaters, and flows in a […]
The Chester Valley between Parkesburg and Coatesville is an east-northeast oriented segment of a much longer through valley and includes the drainage divide between south oriented Buck Run at Pomeroy and south oriented West Branch Brandywine Creek at Coatesville. West Branch Brandywine Creek flows from the 600-700 foot high North Valley Hills (north of the […]
The Chester Valley between Coatesville and Dowingtown is an east-northeast oriented through valley linking south oriented West Branch Brandywine Creek with south oriented East Branch Brandywine Creek. West Branch Brandywine Creek flows from the 500-600 foot high North Valley Hills (north of the Chester Valley) to enter and cross the less than 350-foot high Chester […]
West of the City of West Chester, Pennsylvania the East Branch Brandywine Creek flows in a south-southeast and southwest direction to join southeast, northeast, and southeast oriented West Branch Brandywine Creek and to form southeast oriented Brandywine Creek. Broad Run is a southeast, east, and south-southeast oriented West Branch Brandywine Creek tributary located between the […]
Figure 1: Chester Valley segment between Valley Creek and East Brandywine Creek showing East Brandy Creek and Valley Creek valleys in the South Valley Hills. United States Geological Survey map digitally presented using National Geographic TOPO software. One the Philadelphia region’s most easily recognized landforms is the Chester Valley, which extends in an east-northeast direction […]
Figure 1: Buckingham Mountain region in Bucks County, PA. United States Geological Survey topographic map digitally presented using National Geographic TOPO software. Buckingham Mountain in Bucks County is a high southwest-to-northeast oriented ridge (more than 500 feet at its highest point while surrounding landscape elevations are in the 200-300 foot range). According to the Pennsylvania […]
Figure 1: Delaware Bay extends from northeast of Philadelphia to Cape May and is a drowned river valley. United States Geological Survey map digitally presented using National Geographic TOPO software. Delaware Bay is the flooded lower Delaware River valley or an estuary that extends upstream from south of Cape May, New Jersey almost to Trenton, […]
Figure 1: Jericho Mountain in Bucks County, PA. Bowman Hill is located north of the Jericho Mountain northeast end. The Delaware River flows in a southeast direction across the figure 1 northeast corner. Jericho Creek flows in an east-southeast and east-northeast direction along the Jericho Mountain south flank. Pidcock Creek drains the area north of […]
Figure 1: Solebury Mountain in Bucks County, PA. The Delaware River flows in a south and southeast direction in a water gap eroded between Solebury Mountain and Goat Hill. United States Geological Survey topographic map digitally presented using National Geographic TOPO software. Solebury Mountain is a high ridge (more than 480 feet at its highest […]
Figure 1: Bowman Hill at Washington Crossing Historic Park. The Delaware River flows in a southeast direction in the water gap it eroded between Bowman Hill and Belle Mountain. United States Geological Survey topographic map digitally presented using National Geographic TOPO software. Bowman Hill is a high point (over 400 feet while the adjacent Delaware […]
The Pidcock Creek drainage basin is located east of Doylestown in Bucks County and is bounded on the southwest by the southeast and south oriented Mill Creek drainage basin, the northwest by Buckingham Mountain, the north by Solebury Mountain, the northeast by the southeast oriented Delaware River, and the south and southeast by Bowman Hill […]
Northeast oriented Aquetong Creek headwaters originate north and east of Lahaska, Pa area and eventually reach the south oriented Delaware River while south and south-southwest oriented Lahaska Creek flows just west and south of Lahaska to reach Mill Creek and then Neshaminy Creek, which eventually flows to a southwest oriented Delaware River segment. Through valleys […]
Watson Creek is a relatively minor stream located east of Doylestown and flows in a south and northeast direction to join southeast oriented Mill Creek, which then joins southeast and south oriented Neshaminy Creek. In its short distance Watson Creek passes through two water gaps and abruptly changes direction at an elbow of capture. The […]
The Delaware River flows in a south and southeast direction to Bulls Island and then turns to flow in an east-northeast direction for approximately one mile to Hendrick Island before turning to again flow in a southeast and south direction. Delaware River tributaries from the northeast are aligned in a southwest direction while tributaries from […]
The Paunnacussing Creek-Pine Run Through Valley is located a short distance north and east of Doylestown and links northeast oriented Paunnacussing Creek drainage with southwest oriented Pine Run drainage. Paunnacussing Creek flows in a northeast direction to join the south oriented Delaware River as a barbed tributary. Pine Run flows in a southwest direction to […]
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