https://phillylandforms.info/2025/01/19/examples-of-philadelphia-area-gorges/https://phillylandforms.info/wp-content/uploads/2025/01/image-19.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-18.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-17.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-16.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-15.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-14.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-13.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-12.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-11.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-10.pngimage2025-01-19T22:10:23+00:00monthlyhttps://phillylandforms.info/2025/01/17/examples-of-philadelphia-area-water-gaps/https://phillylandforms.info/wp-content/uploads/2025/01/image-8.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-7.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-6.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-5.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-4.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-3.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-2.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image-1.pngimagehttps://phillylandforms.info/wp-content/uploads/2025/01/image.pngimage2025-01-17T22:22:30+00:00monthlyhttps://phillylandforms.info/2024/12/22/using-topographic-maps-to-determine-philadelphia-drainage-system-and-erosional-landform-origins-part-2/https://phillylandforms.info/wp-content/uploads/2024/12/image-3.pngimagehttps://phillylandforms.info/wp-content/uploads/2024/12/image-2.pngimagehttps://phillylandforms.info/wp-content/uploads/2024/12/image-1.pngimagehttps://phillylandforms.info/wp-content/uploads/2024/12/image.pngimage2024-12-22T22:00:49+00:00monthlyhttps://phillylandforms.info/2024/11/12/using-topographic-maps-to-determine-philadelphia-drainage-system-and-erosional-landform-origins-part-1/https://phillylandforms.info/wp-content/uploads/2024/11/ridgeave-1.pngRidgeAvehttps://phillylandforms.info/wp-content/uploads/2024/11/niagarafallsimagery.pngNiagaraFallsimageryhttps://phillylandforms.info/wp-content/uploads/2024/11/ridgeave.pngRidgeAvehttps://phillylandforms.info/wp-content/uploads/2024/11/schuylkillgorge.pngSchuylkillgorge2024-11-12T22:22:50+00:00monthlyhttps://phillylandforms.info/2019/04/09/published-papers-related-to-this-philadelphia-area-landform-origins-website/2024-01-01T22:22:10+00:00monthlyhttps://phillylandforms.info/2023/01/22/the-topographic-map-mystery-geologys-unrecognized-paradigm-problem/https://phillylandforms.info/wp-content/uploads/2023/01/image.pngimage2023-01-26T14:36:37+00:00monthlyhttps://phillylandforms.info/2015/07/11/guide-to-landforms-seen-along-septas-west-trenton-regional-rail-line/2021-10-18T22:33:36+00:00monthlyhttps://phillylandforms.info/2015/01/11/jenkintown-elbow-of-capture/https://phillylandforms.info/wp-content/uploads/2015/01/1a2jenkintownelbow.jpg1A2JenkintownelbowFigure 1: Jenkintown elbow of capture.2021-01-02T23:30:37+00:00monthlyhttps://phillylandforms.info/2015/07/21/little-neshaminy-creek-wissahickin-creek-drainage-divide-area-west-of-the-willow-grove-naval-air-station/https://phillylandforms.info/wp-content/uploads/2015/07/litneshaminywissahickon.jpgLitNeshaminyWissahickon2016-10-15T12:10:29+00:00monthlyhttps://phillylandforms.info/2015/01/10/wissahickon-drainage-basin-southeast-pennsylvania/https://phillylandforms.info/wp-content/uploads/2015/01/a11monoshonecreek-e1420932256691.jpgA11Monoshonecreekigure 15: Wissahickon Creek elbow of capture at Monoshone Creek and the Wissahickon Creek confluence with the Schuylkill River. United States Geological Survey map presented using National Geographic TOPO software.https://phillylandforms.info/wp-content/uploads/2015/01/a9gorge-entrance-e1420932181775.jpgA9Gorge entranceFigure 14: North entrance to the Wissahickon Creek gorge at the Philadelphia city line. The city line is marked and extends in a northeast direction from near map southwest corner to just east of the map north center edge. Wissahickon Creek is flowing at an elevation of approximately 120 feet where it enters the gorge. Elevations greater than 400 feet can be found on either side of gorge meaning the gorge is approximately 300 feet deep. The marked Andorra Wind Gap links the valleys of a northeast oriented Wissahickon Creek tributary and a southwest oriented Schuylkill River tributary and has an elevation of 266 feet. United States Geological Survey map presented using National Geographic TOPO software.https://phillylandforms.info/wp-content/uploads/2015/01/a3sanyruntacony-e1420932034904.jpgA3SanyRunTaconyFigure 13: Sandy Run-Tacony Creek drainage divide. Camp Hill is the ridge in the map northwest corner and Sandy Run flows in a southwest direction just south of Camp Hill. Edge Hill is a ridge extending in a northeast direction from the the map south edge (near southwest corner) and is notched by marked wind gaps. East oriented Tacony Creek headwaters are south of the Edge Hill ridge and meet a southwest oriented through valley (linked to a northeast oriented Pennypack Creek tributary) at approximately the location of the large industrial plant near the map south edge. Where the east oriented Tacony Creek valley joins the southwest oriented through valley Tacony Creek turns to flow in a south direction to reach the Delaware River. The Edge Hill ridge was formed as southwest oriented flow eroded less resistant bedrock both to the northwest and the southeast. Wind gaps mark locations of flow channels that crossed the emerging ridge. Headward erosion of the south oriented Tacony Creek valley captured southwest oriented flow that had been moving to the actively eroding Wissahickon Creek valley (although that flow had been moving at elevation equivalent to the Edge Hill ridge crest elevation today).https://phillylandforms.info/wp-content/uploads/2015/01/a8whitemarshvalley-e1420931688342.jpgA8WhitemarshvalleyFigure 12: Whitemarsh Valley just north of the metamorphic and igneous rock ridge through which the Wissahickon Gorge is cut. Wissahickon Creek flows in a south direction near the east edge of the map across the Whitemarsh Valley to reach the gorge entrance seen in figure 14. Plymouth Creek drains in a south and southwest direction to eventually reach the Schuylkill River (upstream from the Schuylkill River gorge). The Whitemarsh through valley near the map center links the Wissahickon Creek valley with the Plymouth Creek valley and has an elevation of 206 feet where the railroad crosses the drainage divide (just north of the limestone quarry). The entire Whitemarsh Valley area is lower in elevation than crest elevations on the metamorphic and igneous rock ridge through which the downstream Wissahickon Creek gorge is cut. United States Geological Survey map presented using National Geographic TOPO software.https://phillylandforms.info/wp-content/uploads/2015/01/wisgorgereduced-e1420931621886.jpgWisGorgereducedFigure 11: Reduced size topographic map showing the northwest Philadelphia area where the Schuylkill River and Wissahickon Creek have cut gorges across the 400-foot high complex of metamorphic and igneous rock. The Schuylkill River flows in a southeast direction and the south oriented Wissahickon Creek gorge is located near the map center. Note how tributary valleys are oriented in southwest and northeast directions on both sides of both the Wiisahickon and the Schuylkill valleys. This northeast to southwest tributary orientation is evidence large volumes of southwest oriented water flowed across the region as both the Wissahickon Creek gorge and the Schuylkill River gorge were being eroded. Wissahickon Creek valley headward erosion beheaded southwest oriented flow routes to the actively eroding Schuylkill River valley. United States Geological Survey map presented using National Geographic TOPO software.https://phillylandforms.info/wp-content/uploads/2015/01/a7fortwashingtonwatergap-e1420931480595.jpgA7FortWashingtonwatergapFigure 9: A shallow northeast to southwest oriented valley with an elevation of slightly less than 300 feet in the Wing Field area links the northeast oriented Prophecy Creek headwaters valley with the southwest oriented Plymouth Creek headwaters. Prophecy Creek flows to southeast oriented Wissahickon Creek as a barbed tributary. Much deeper valleys with elevations of slightly more than 200 feet link the Wissahickon Creek valley with Plymouth Creek are located just south of figure 9. United States Geological Survey map presented using National Geographic TOPO software.https://phillylandforms.info/wp-content/uploads/2015/01/a22prophecyplymouth-e1420931362666.jpgA22ProphecyPlymouthFigure 9: A shallow northeast to southwest oriented valley with an elevation of slightly less than 300 feet in the Wing Field area links the northeast oriented Prophecy Creek headwaters valley with the southwest oriented Plymouth Creek headwaters. Prophecy Creek flows to southeast oriented Wissahickon Creek as a barbed tributary. Much deeper valleys with elevations of slightly more than 200 feet link the Wissahickon Creek valley with Plymouth Creek are located just south of figure 9. United States Geological Survey map presented using National Geographic TOPO software.https://phillylandforms.info/wp-content/uploads/2015/01/a6ambler-water-gap-e1420931246656.jpgA6Ambler Water GapFigure 8: Wissahickon Creek flows in a southeast direction across low southwest to northeast oriented ridges in the Ambler region. Northeast oriented tributaries, including Prophecy Creek, from the southwest join Wissahickon Creek as barbed tributaries while southwest oriented tributaries flow to Wissahickon Creek from the northeast. The northeast and southwest orientation of tributaries in the Ambler region provide evidence the Wissahickon Creek valley eroded headward across multiple southwest oriented flow channels. United States Geological Survey map presented using National Geographic TOPO software.https://phillylandforms.info/wp-content/uploads/2015/01/a5gwynedd-valley-water-gap-e1420931071561.jpgA5Gwynedd Valley Water GapFigure 7: Wissahickon Creek valley showing the North Wales and Gwynedd Valley water gaps. Downstream from the North Wales water gap Wissahickon Creek flows in an east direction before turning in a south direction to flow through the Gwynedd Valley water gap. Southwest oriented Trewellyn Creek and Willow Run flow on either side of the eroded ridge, which is approximately 350 feet high or about 100 feet higher than the Wissahickon Creek valley floor. Headwaters of southwest oriented Stony Creek can be seen on the northwest side of the ridge west of the Wissahickon Creek valley. Stony Creek flows to Skippack Creek, which then flows to Perkiomen Creek, which flows to the Schuylkill River. The gap linking the Stony Creek headwaters with the Wissahickon Creek valley has an elevation of approximately 300 feet and is about 50 feet lower in elevation than the ridge crest. United States Geological Survey map presented using National Geographic TOPO software.https://phillylandforms.info/wp-content/uploads/2015/01/a3zacharias-e1420930959872.jpgA3ZachariasFigure 6: Wissahickon Creek water gap near North Wales is located near center of map. Wissahickon Creek flows in a south-southwest and south-southeast direction from the map north center edge to the water gap and south of the water gap turns to flow in an east direction to near the map southeast corner. Southwest oriented Zacharias Creek headwaters are located in the map northwest corner, with Zacharis Creek flowing to south and southwest oriented Skippack Creek, which flows to Perkiomen Creek, which in turn flows to the Schuylkill River. Note ridge extending from the map southwest corner to the map northeast corner through which Wissahickon Creek has eroded its North Wales water gap. Unnamed southwest oriented tributaries join Wissahickon Creek south of the water gap. United States Geological Survey map presented using National Geographic TOPO software.2016-10-09T00:22:39+00:00monthlyhttps://phillylandforms.info/2016/07/13/erosional-history-of-the-sandy-run-drainage-basin-montgomery-county-pennsylvania/https://phillylandforms.info/wp-content/uploads/2016/07/sandyruntopomap.pngSandyRuntopomaphttps://phillylandforms.info/wp-content/uploads/2016/07/sandyrungapdetail.pngSandyRungapdetailhttps://phillylandforms.info/wp-content/uploads/2016/07/pennypackwissahickon.pngPennypackWissahickon2016-07-30T18:37:00+00:00monthlyhttps://phillylandforms.info/2016/07/30/origin-of-the-north-oriented-valley-creek-water-gap-between-mount-joy-and-mount-misery-valley-forge-national-historical-park-pennsylvania/https://phillylandforms.info/wp-content/uploads/2016/07/5schuylkillriver.png5SchuylkillRiverhttps://phillylandforms.info/wp-content/uploads/2016/07/4valleyckwest.png4ValleyCkwesthttps://phillylandforms.info/wp-content/uploads/2016/07/3twovalleycks.png3TwoValleyCkshttps://phillylandforms.info/wp-content/uploads/2016/07/2mtjoywatergap.png2MtJoywatergaphttps://phillylandforms.info/wp-content/uploads/2016/07/1detmtjoywatergap.png1detMtJoywatergap2016-07-30T18:34:56+00:00monthlyhttps://phillylandforms.info/2016/07/04/origin-of-the-gulph-creek-drainage-basin-chester-delaware-and-montgomery-counties-pennsylvania/https://phillylandforms.info/wp-content/uploads/2016/07/gulphckwatergap3.pngGulphCkwatergap3https://phillylandforms.info/wp-content/uploads/2016/07/matsonfordthruvalley2.pngMatsonfordthruvalley2https://phillylandforms.info/wp-content/uploads/2016/07/straffordthruvalley2.pngStraffordthruvalley2https://phillylandforms.info/wp-content/uploads/2016/07/gulphckdrainagebasin.pngGulphCkdrainagebasinhttps://phillylandforms.info/wp-content/uploads/2016/07/phillywest21.pngPhillywest22016-07-05T23:04:49+00:00monthlyhttps://phillylandforms.info/2015/08/03/guide-to-landforms-seen-along-septas-lansdale-doylestown-regional-rail-line/2015-12-19T22:16:28+00:00monthlyhttps://phillylandforms.info/2015/09/30/the-red-clay-creek-white-clay-creek-divide-area-near-kennett-square-pa/https://phillylandforms.info/wp-content/uploads/2015/09/wbrredclayrebrwhiteclay.jpgWBrRedClayrEBrWhiteClay2015-09-30T20:15:11+00:00monthlyhttps://phillylandforms.info/2015/09/29/the-brandywine-creek-red-clay-creek-divide-area-near-longwood-gardens/https://phillylandforms.info/wp-content/uploads/2015/09/longwoodgarden4.jpgLongwoodGarden4https://phillylandforms.info/wp-content/uploads/2015/09/longwoodgarden.jpgLongwoodGarden2015-09-30T01:02:54+00:00monthlyhttps://phillylandforms.info/2015/01/10/philly-landforms-web-site-overview/https://phillylandforms.info/wp-content/uploads/2015/01/wissahickon1.jpgWissahickon1https://phillylandforms.info/wp-content/uploads/2015/01/brgmorganpak.jpgbrgmorganpak.jpg2015-09-18T22:03:50+00:00monthlyhttps://phillylandforms.info/2015/09/12/bucks-county-water-gaps-inventory-by-township/2015-09-13T00:51:15+00:00monthlyhttps://phillylandforms.info/2015/09/11/bucks-county-barbed-tributary-and-elbow-of-capture-inventory-by-township/2015-09-11T23:53:23+00:00monthlyhttps://phillylandforms.info/2015/09/07/bucks-county-through-valley-inventory-by-township/2015-09-09T01:08:16+00:00monthlyhttps://phillylandforms.info/2015/09/08/bucks-county-hill-inventory-by-township/2015-09-09T01:03:45+00:00monthlyhttps://phillylandforms.info/2015/09/03/a-remarkable-divide-separating-two-completely-different-valley-creek-drainage-basins-in-and-south-of-the-chester-valley/https://phillylandforms.info/wp-content/uploads/2015/09/valleyeastbrandywine.jpgValleyEastBrandywinehttps://phillylandforms.info/wp-content/uploads/2015/09/valleyforgewest.jpgValleyForgewesthttps://phillylandforms.info/wp-content/uploads/2015/09/valleyvalley1.jpgValleyValley12015-09-04T00:34:44+00:00monthlyhttps://phillylandforms.info/2015/08/23/west-branch-chester-creek-brandywine-creek-divide-east-and-south-of-chadds-ford-pa-and-north-of-delaware-border/https://phillylandforms.info/wp-content/uploads/2015/08/wchesterbrandywinechadds.jpgWchesterBrandywineChadds2015-08-24T01:01:55+00:00monthlyhttps://phillylandforms.info/2015/08/19/guide-to-landforms-seen-along-the-septa-paoli-thorndale-regional-rail-line/2015-08-20T01:36:00+00:00monthlyhttps://phillylandforms.info/2015/07/19/neshaminy-creek-little-neshaminy-creek-drainage-divide-area-in-warrington-township-bucks-county-pa/https://phillylandforms.info/wp-content/uploads/2015/07/litneshbignesh.jpgLitNeshbigNesh2015-07-20T01:07:40+00:00monthlyhttps://phillylandforms.info/2015/07/07/guide-to-landforms-seen-along-septas-warminster-regional-rail-line/2015-07-11T22:31:25+00:00monthlyhttps://phillylandforms.info/2015/04/15/landforms-seen-along-septas-norristown-high-speed-line/2015-07-07T23:31:44+00:00monthlyhttps://phillylandforms.info/2015/02/16/chester-valley-between-coatesville-and-downingtown/https://phillylandforms.info/wp-content/uploads/2015/02/chestervaldet.jpgChestervaldet2015-07-07T21:54:52+00:00monthlyhttps://phillylandforms.info/2015/03/05/chester-valley-origin-some-alternate-interpretat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Hill2015-05-17T23:17:59+00:00monthlyhttps://phillylandforms.info/2015/05/12/southeast-end-of-the-drainage-divide-between-chester-creek-and-west-branch-chester-creek-at-chester-heights-pa/https://phillylandforms.info/wp-content/uploads/2015/05/chesterheights.jpgChesterHeights2015-05-13T00:51:59+00:00monthlyhttps://phillylandforms.info/2015/05/11/ridley-creek-chester-creek-drainage-divide-area-located-west-of-media-chester-county-pa/https://phillylandforms.info/wp-content/uploads/2015/05/ridleychester.jpgRidleyChester2015-05-12T01:43:37+00:00monthlyhttps://phillylandforms.info/2015/04/20/barbed-tributaries-and-aligned-drainage-near-media-delaware-county-pa/https://phillylandforms.info/wp-content/uploads/2015/04/media.jpgMedia2015-04-21T00:52:56+00:00monthlyhttps://phillylandforms.info/2015/04/19/crum-creek-ridley-creek-drainage-divide-near-geist-reservoir-delaware-county-pa/https://phillylandforms.info/wp-content/uploads/2015/04/geistres.jpgGeistRes2015-04-20T00:14:03+00:00monthlyhttps://phillylandforms.info/2015/03/16/some-reasons-why-previous-researchers-have-been-unable-to-explain-pennsylvania-drainage-route-origins/2015-04-14T00:18:49+00:00monthlyhttps://phillylandforms.info/2015/04/08/strafford-through-valley-linking-darby-and-gulph-creeks/https://phillylandforms.info/wp-content/uploads/2015/04/straffordthruvalley.jpgStraffordthruvalley2015-04-09T01:23:07+00:00monthlyhttps://phillylandforms.info/2015/04/07/radnor-saddle-on-the-schuylkill-river-delaware-river-drainage-divide/https://phillylandforms.info/wp-content/uploads/2015/04/radnorsaddle.jpgRadnorsaddle2015-04-07T23:02:07+00:00monthlyhttps://phillylandforms.info/2015/04/06/rosemont-saddle-on-the-schuylkill-river-delaware-river-drainage-divide/https://phillylandforms.info/wp-content/uploads/2015/04/rosemontgap.jpgRosemontgap2015-04-07T00:53:59+00:00monthlyhttps://phillylandforms.info/2015/04/03/schuylkill-river-mill-creek-drainage-divide-area-east-and-north-of-bryn-mawr/https://phillylandforms.info/wp-content/uploads/2015/04/millschuylkill.jpgMillSchuylkill2015-04-03T23:01:26+00:00monthlyhttps://phillylandforms.info/2015/02/28/through-valley-crossing-the-delaware-schuylkill-drainage-divide-at-deer-run-and-east-branch-perkiomen-creek/https://phillylandforms.info/wp-content/uploads/2015/02/ebrperkdeerrun.jpgEBrPerkDeerrun2015-03-01T00:54:11+00:00monthlyhttps://phillylandforms.info/2015/02/27/morris-run-an-east-branch-perkiomen-creek-barbed-tributary/https://phillylandforms.info/wp-content/uploads/2015/02/morrisrun.jpgMorrisRun2015-02-28T01:32:57+00:00monthlyhttps://phillylandforms.info/2015/02/26/evidence-of-diverging-and-converging-channels-in-the-souderton-telford-region/https://phillylandforms.info/wp-content/uploads/2015/02/souderton.jpgSouderton2015-02-27T01:33:44+00:00monthlyhttps://phillylandforms.info/2015/02/25/schuylkill-river-elbows-of-capture-upstream-from-valley-forge-national-historical-park/https://phillylandforms.info/wp-content/uploads/2015/02/vfelbows.jpgVFelbows2015-02-26T00:49:56+00:00monthlyhttps://phillylandforms.info/2015/02/24/water-gaps-wind-gaps-and-through-valleys-in-and-near-valley-forge-national-historical-park/https://phillylandforms.info/wp-content/uploads/2015/02/valleyforgewest.jpgValleyForgewest2015-02-25T01:17:32+00:00monthlyhttps://phillylandforms.info/2015/02/23/the-chester-valley-drainage-divide-between-the-delaware-and-schuylkill-river/https://phillylandforms.info/wp-content/uploads/2015/02/chestervalley.jpgChesterValley2015-02-24T02:11:11+00:00monthlyhttps://phillylandforms.info/2015/02/22/water-and-wind-gaps-near-christiana-pennsylvania/https://phillylandforms.info/wp-content/uploads/2015/02/cristianagaps2.jpgCristianagaps22015-02-23T01:05:39+00:00monthlyhttps://phillylandforms.info/2015/02/21/honey-brook-basin-between-welsh-mountain-and-the-baron-hills-where-the-susquehanna-delaware-and-schuylkill-river-drainage-basins-meet/https://phillylandforms.info/wp-content/uploads/2015/02/honeybrookbasin.jpgHoneybrookbasin2015-02-22T00:00:49+00:00monthlyhttps://phillylandforms.info/2015/02/20/south-branch-french-creek-and-east-branch-brandywine-creek-headwaters-area-between-welsh-mountain-and-the-baron-hills/https://phillylandforms.info/wp-content/uploads/2015/02/sbrfrenchebrbrandy.jpgSBrFrenchEBrBrandy2015-02-21T01:42:43+00:00monthlyhttps://phillylandforms.info/2015/02/19/east-and-west-branch-brandywine-creek-headwaters-between-welsh-mountain-and-the-baron-hills/https://phillylandforms.info/wp-content/uploads/2015/02/ebrwbrbrandy.jpgEBrWBrBrandy2015-02-19T16:15:00+00:00monthlyhttps://phillylandforms.info/2015/02/18/through-valley-linking-pequea-creek-with-west-branch-brandywine-creek-located-between-welsh-mountain-and-the-baron-hills/https://phillylandforms.info/wp-content/uploads/2015/02/wbrbrandtpequea.jpgWbrBrandtPequea2015-02-18T23:48:59+00:00monthlyhttps://phillylandforms.info/2015/02/17/chester-valley-between-buck-run-and-west-branch-brandywine-creek/https://phillylandforms.info/wp-content/uploads/2015/02/chestervalleywest.jpgChestervalleywest2015-02-18T00:10:35+00:00monthlyhttps://phillylandforms.info/2015/02/15/drainage-divide-between-the-east-and-west-branches-brandywine-creek-located-west-of-west-chester/2015-02-15T23:31:25+00:00monthlyhttps://phillylandforms.info/2015/02/14/394/2015-02-15T02:01:27+00:00monthlyhttps://phillylandforms.info/2015/02/12/buckingham-mountain-bucks-county-pa/https://phillylandforms.info/wp-content/uploads/2015/02/buckinghammtn.jpgBuckinghamMtn2015-02-12T14:19:05+00:00monthlyhttps://phillylandforms.info/2015/02/11/delaware-bay-philadelphias-estuary-or-drowned-river-valley/https://phillylandforms.info/wp-content/uploads/2015/02/delawarebay.jpgDelawareBay2015-02-11T22:55:50+00:00monthlyhttps://phillylandforms.info/2015/02/10/jericho-mountain-bucks-county-pa/https://phillylandforms.info/wp-content/uploads/2015/02/jerichomtn.jpgJerichoMtn2015-02-11T00:43:14+00:00monthlyhttps://phillylandforms.info/2015/02/09/solebury-mountain-bucks-county-pa/https://phillylandforms.info/wp-content/uploads/2015/02/soleburymtn.jpgSoleburyMtn2015-02-10T02:26:57+00:00monthlyhttps://phillylandforms.info/2015/01/21/delaware-river-benjamin-franklin-bridge-of-capture/https://phillylandforms.info/wp-content/uploads/2015/01/phillydelawareelbow.jpgPhillyDelawareelbow2015-02-10T00:47:56+00:00monthlyhttps://phillylandforms.info/2015/02/08/mill-creek-pidcock-creek-drainage-divide-and-pidcock-creek-drainage-basin-origin/2015-02-09T02:30:47+00:00monthlyhttps://phillylandforms.info/2015/02/06/aquetong-creek-lahaska-creek-drainage-divide-area-solebury-township-bucks-county/https://phillylandforms.info/wp-content/uploads/2015/02/newaquetong.jpgnewAquetong2015-02-06T16:42:24+00:00monthlyhttps://phillylandforms.info/2015/02/03/delaware-river-elbows-of-capture-between-bulls-island-and-hendrick-island/https://phillylandforms.info/wp-content/uploads/2015/02/delawarejog.jpgDelawarejog2015-02-05T01:46:24+00:00monthlyhttps://phillylandforms.info/2015/02/04/watson-creek-elbows-of-capture-and-water-gaps-east-of-doylestown/https://phillylandforms.info/wp-content/uploads/2015/02/watsoncreek.jpgWatsonCreek2015-02-05T01:43:39+00:00monthlyhttps://phillylandforms.info/2015/02/02/paunnacussing-creek-pine-run-through-valley/https://phillylandforms.info/wp-content/uploads/2015/02/pinerunpaunnacussing.jpgPineRunPaunnacussing2015-02-02T22:40:09+00:00monthlyhttps://phillylandforms.info/2015/01/12/meadow-brook-through-valley/https://phillylandforms.info/wp-content/uploads/2015/01/1a3detmeadowbrkvalley.jpg1A3detMeadowBrkvalleyFigure 1: Meadow Brook Through Valley. 2015-02-01T14:13:01+00:00monthlyhttps://phillylandforms.info/2015/01/25/somerton-huntingdon-valley-through-valley/https://phillylandforms.info/wp-content/uploads/2015/01/somertonthruvalley.jpgSomertonthruvalley2015-02-01T14:11:43+00:00monthlyhttps://phillylandforms.info/2015/01/27/neshaminy-creek-elbow-of-capture-near-neshaminy-falls/https://phillylandforms.info/wp-content/uploads/2015/01/neshaminyfalls.jpgNeshaminyFalls2015-02-01T14:10:09+00:00monthlyhttps://phillylandforms.info/2015/01/31/delaware-river-north-branch-neshaminy-creek-plumstead-township-through-valley/https://phillylandforms.info/wp-content/uploads/2015/01/plumsteadthruvalley.jpgPlumsteadthruvalley2015-02-01T02:59:41+00:00monthlyhttps://phillylandforms.info/2015/01/31/core-creek-elbow-of-capture-east-of-newtown-pa/https://phillylandforms.info/wp-content/uploads/2015/01/corecreek.jpgCoreCreek2015-01-31T23:14:06+00:00monthlyhttps://phillylandforms.info/2015/01/30/shallow-through-valleys-crossing-the-neshaminy-creek-newtown-creek-drainage-divide/https://phillylandforms.info/wp-content/uploads/2015/01/neshaminynewton.jpgNeshaminyNewton2015-01-31T02:39:09+00:00monthlyhttps://phillylandforms.info/2015/01/16/sandy-run-elbow-of-capture-near-fort-washington/2015-01-30T23:50:32+00:00monthlyhttps://phillylandforms.info/2015/01/30/aligned-drainage-and-barbed-tributaries-in-the-delaware-river-valley-near-new-hope-pa/https://phillylandforms.info/wp-content/uploads/2015/01/newhopearea.jpgNewHopearea2015-01-30T23:43:35+00:00monthlyhttps://phillylandforms.info/2015/01/29/aligned-drainage-and-barbed-tributaries-in-the-delaware-river-valley-near-washington-crossing/https://phillylandforms.info/wp-content/uploads/2015/01/washingtonxing.jpgWashingtonXing2015-01-30T01:38:58+00:00monthlyhttps://phillylandforms.info/2015/01/15/fort-washington-water-gaps-wissahickon-creek-and-sandy-run/https://phillylandforms.info/wp-content/uploads/2015/01/1a6ftwashingwg.jpg1A6FtWashingWGFigure 1: Fort Washington area water gaps. 2015-01-29T15:10:09+00:00monthlyhttps://phillylandforms.info/2015/01/24/tacony-creek-gorge-between-jenkintown-and-elkins-park/https://phillylandforms.info/wp-content/uploads/2015/01/fig1taconygorge.jpgFig1Taconygorge2015-01-29T15:00:58+00:00monthlyhttps://phillylandforms.info/2015/01/17/marble-hall-through-valley-between-spring-mill-and-wissahickon-creeks/https://phillylandforms.info/wp-content/uploads/2015/01/a9marblehall.jpg!A9MarbleHallFigure 1; Marble Hall Through Valley.2015-01-29T01:55:23+00:00monthlyhttps://phillylandforms.info/2015/01/17/171/https://phillylandforms.info/wp-content/uploads/2015/01/1a8bwissahickongorge.jpg1A8bWissahickongorgeFig 3: https://phillylandforms.info/wp-content/uploads/2015/01/1a8aschuylkillsw.jpg1A8aSchuylkillSWFigure 2: https://phillylandforms.info/wp-content/uploads/2015/01/1a8wissahickonschuylkill.jpg1A8WissahickonSchuylkillFigure 1: 2015-01-29T01:52:43+00:00monthlyhttps://phillylandforms.info/2015/01/22/schuylkill-river-spring-mill-elbow-of-capture/https://phillylandforms.info/wp-content/uploads/2015/01/schuylkillspringmillrlbow.jpgSchuylkillSpringMillrlbow2015-01-29T01:47:51+00:00monthlyhttps://phillylandforms.info/2015/01/23/aligned-drainage-and-pennypack-creek-barbed-tributaries-near-fox-chase/https://phillylandforms.info/wp-content/uploads/2015/01/pennypackfoxchase.jpgPennypackFoxChase2015-01-29T01:43:27+00:00monthlyhttps://phillylandforms.info/2015/01/14/chalfont-elbow-of-capture/https://phillylandforms.info/wp-content/uploads/2015/01/1a9nbrneshaminy.jpg1A9NBrNeshaminyFigure 2: Reduced size maphttps://phillylandforms.info/wp-content/uploads/2015/01/a25neshaminychalfont1.jpgA25NeshaminyChalfontFigure 1: Chalfont Elbow of Capture2015-01-29T01:33:14+00:00monthlyhttps://phillylandforms.info/2015/01/27/neshaminy-creek-water-gap-and-elbows-of-capture-near-langhorne/https://phillylandforms.info/wp-content/uploads/2015/01/neshaminylanghornelbows.jpgNeshaminyLanghornelbows2015-01-29T01:29:33+00:00monthlyhttps://phillylandforms.info/2015/01/28/neshimany-creek-ironworks-creek-through-valley-at-richboro/https://phillylandforms.info/wp-content/uploads/2015/01/tylerstparkthruvalley.jpgTylerStParkthruvalleyhttps://phillylandforms.info/wp-content/uploads/2015/01/ironworksckloop.jpgIronworksCkloop2015-01-29T01:28:16+00:00monthlyhttps://phillylandforms.info/2015/01/26/mill-creek-southampton-creek-through-valley/https://phillylandforms.info/wp-content/uploads/2015/01/millsouthamptonthruvalley.jpgMillSouthamptonthruvalley2015-01-26T21:28:38+00:00monthlyhttps://phillylandforms.info/2015/01/25/tacony-creek-cheltenham-elbow-of-capture/https://phillylandforms.info/wp-content/uploads/2015/01/pennypacktacony.jpgPennypackTacony2015-01-25T15:34:54+00:00monthlyhttps://phillylandforms.info/2015/01/25/schuylkill-river-gorge/https://phillylandforms.info/wp-content/uploads/2015/01/schuylkillgorge.jpgSchuylkillGorge2015-01-25T01:47:19+00:00monthlyhttps://phillylandforms.info/2015/01/22/spring-mill-creek-drainage-basin-origin-and-history/https://phillylandforms.info/wp-content/uploads/2015/01/fig1springmill.jpgFig1SpringMillFigure 1: Spring Mill Creek drainage basin region. 2015-01-22T01:15:24+00:00monthlyhttps://phillylandforms.info/2015/01/20/the-wissahickon-gorge-philadelphias-unique-and-magnificent-water-gap/https://phillylandforms.info/wp-content/uploads/2015/01/1a1gorgereduced.jpg1A1Gorgereduced2015-01-21T20:19:03+00:00monthlyhttps://phillylandforms.info/2015/01/20/schuylkill-river-roosevelt-avenue-and-columbia-bridge-elbows-of-capture/https://phillylandforms.info/wp-content/uploads/2015/01/phillynschuylkillelbows.jpgPhillyNSchuylkillelbows2015-01-21T01:45:06+00:00monthlyhttps://phillylandforms.info/2015/01/19/aligned-drainage-barbed-tributaries-through-valleys-and-water-gaps-in-the-stony-creek-headwaters-area/https://phillylandforms.info/wp-content/uploads/2015/01/1a5aafranklinville1.jpg1A5AaFranklinvilleFigure 2: https://phillylandforms.info/wp-content/uploads/2015/01/1a4astonyckbest.jpg1A4aStonyCkbestFigure 1: 2015-01-19T23:50:28+00:00monthlyhttps://phillylandforms.info/2015/01/19/ambler-area-aligned-drainage-barbed-tributaries-and-water-gaps/https://phillylandforms.info/wp-content/uploads/2015/01/1a3ambler.jpg1A3Ambler2015-01-19T23:49:16+00:00monthlyhttps://phillylandforms.info/2015/01/19/north-wales-area-aligned-drainage-elbow-of-capture-and-water-gap/https://phillylandforms.info/wp-content/uploads/2015/01/1a2northwales.jpg1A2NorthWales2015-01-19T21:59:14+00:00monthlyhttps://phillylandforms.info/2015/01/18/wissahickon-creek-elbow-of-capture-and-water-gap-at-gynedd-valley/https://phillylandforms.info/wp-content/uploads/2015/01/1a5aafranklinville.jpg1A5AaFranklinvillehttps://phillylandforms.info/wp-content/uploads/2015/01/1a5gyneddvalley.jpg1A5GyneddValley2015-01-18T20:13:25+00:00monthlyhttps://phillylandforms.info/2015/01/18/dresher-pennypack-creek-through-valley/https://phillylandforms.info/wp-content/uploads/2015/01/1a6pennypackdesher.jpg1A6PennypackDesherFigure 1: 2015-01-18T15:39:02+00:00monthlyhttps://phillylandforms.info/2015/01/18/181/https://phillylandforms.info/wp-content/uploads/2015/01/1a7andorrawg.jpg1A7AndorraWGFigure 1:2015-01-18T01:55:03+00:00monthlyhttps://phillylandforms.info/2015/01/16/whitemarsh-through-valley-between-plymouth-and-wissahickon-creeks/https://phillylandforms.info/wp-content/uploads/2015/01/1a5whitemarshvalley.jpg1A5WhitemarshValleyFigure 1: Whitemarsh Through Valley. 2015-01-17T02:13:13+00:00monthlyhttps://phillylandforms.info/2015/01/15/southwest-oriented-wissahickon-creek-headwaters/https://phillylandforms.info/wp-content/uploads/2015/01/1a7towamencinhead.jpg1A7TowamencinheadFigure 2: Towamencin Creek headwaters located just west of the Wissahickon Creek headwaters. https://phillylandforms.info/wp-content/uploads/2015/01/1a8wissahickonhead.jpg1A8WissahickonheadFigure 1: Wissahickon Creek headwaters area. 2015-01-15T01:20:43+00:00monthlyhttps://phillylandforms.info/2015/01/11/tacony-creek-east-oriented-headwaters-segment/https://phillylandforms.info/wp-content/uploads/2015/01/1a1tacony-head.jpg1A1Tacony headFigure 1: Tacony Creek east oriented headwaters. 2015-01-14T20:56:52+00:00monthlyhttps://phillylandforms.info/2015/01/12/ardsley-wind-gap/https://phillylandforms.info/wp-content/uploads/2015/01/1a5edgehillgap.jpg1A5EdgeHillgapFigure 1. Ardsley Wind Gap. 2015-01-14T20:52:14+00:00monthlyhttps://phillylandforms.info/2015/01/12/edge-hill-wind-gap/2015-01-14T20:51:07+00:00monthlyhttps://phillylandforms.info/2015/01/13/seminary-wind-gap/https://phillylandforms.info/wp-content/uploads/2015/01/1a6laverockgap.jpg1A6LaverockgapFigure 1. Seminary Wind Gap.2015-01-14T20:49:53+00:00monthlyhttps://phillylandforms.info/2015/01/13/laverock-wind-gap/2015-01-14T20:47:58+00:00monthlyhttps://phillylandforms.info/about/2011-11-22T22:37:26+00:00weekly0.6https://phillylandforms.infodaily1.02025-01-19T22:10:23+00:00