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Schuylkill River basin
Summary of fish taxa collected September 11, 2014, at sample sites on West ...
Summary of metrics for macroinvertebrate taxa collected October 1, 2014, at...
Hydrograph-separation analysis and components of the annual hydrologic budg...
Topographic drainage basins (colored polygons), flooded extent of undergrou...
Hydrological and Geophysical Investigation of Streamflow Losses and Restoration Strategies in an Abandoned Mine Lands Setting
Bicycle tour of the geology and hydrology of Philadelphia
Abstract This field trip provides an overview of both the geology underlying the city of Philadelphia and the hydrology of the Schuylkill River watershed. Philadelphia is located at the contact between two major East Coast physiographic provinces, the New Jersey Coastal Plain and the Piedmont. The Piedmont rocks are examined during this field trip. In this area, the Piedmont exhibits low to moderate relief and is underlain by folded and faulted sedimentary and metasedimentary rocks of early Paleozoic age. These rocks are interpreted to represent the collision of a magmatic arc with a continental landmass and adjacent forearc basin sediments during the early Paleozoic; they are intensely deformed and metamorphosed to the amphibolite and granulite facies. The Piedmont rocks appear in the type section of the Wissahickon Formation, which will be the geologic focus of this field trip. The hydrology of the Schuylkill River and one of its major tributaries, Wissahickon Creek, will also be discussed during the trip.
Rivers, glaciers, landscape evolution, and active tectonics of the central Appalachians, Pennsylvania and Maryland
Abstract Welcome to the Appalachian landscape! Our field trip begins with a journey across Fall Zone (Fig. 1 ), named for the falls and rapids on streams flowing from the consolidated rocks of the Appalachians onto the unconsolidated sediments of the Coastal Plain. The eastern U.S. urban centers are aligned along the Fall Zone, the upstream limit of navigation. Typically, the rocks west of the Fall Zone are part of the Piedmont province. This province exposes the metamorphic core of the Appalachian Mountains exhumed by both tectonics and erosion. At least four major phases of deformation are preserved in Piedmont rocks, three Paleozoic convergent events that closed Iapetus, followed by Mesozoic extension that opened the Atlantic Ocean. A record of Cretaceous to Quaternary exhumation of the Appalachians is preserved as Coastal Plain sediments. Late Triassic and Jurassic erosion is preserved in the syn-extensional fault basins, such as the Newark basin, or is buried beneath Coastal Plain sediments (Fig. 1 ). The trip proceeds northwest across the Fall Zone and Piedmont and into the Newark basin. Late Triassic and Jurassic fluvial red sandstone, lacustrine gray shale, and black basalt were deposited in this basin. The Newark basin is separated from the Blue Ridge by a down to the east normal fault that locally has contemporary microseismicity. The Blue Ridge represents a great thrust sheet that was emplaced from the southeast during the Alleghenian orogeny (Permian). The summits of the Blue Ridge are commonly broad and accordant. Davis (1889) projected that accordance westward to the summits of the Ridge and Valley to define his highest and oldest peneplain—the Schooley peneplain. North and west of the Blue Ridge is the Great Valley Section of the Ridge and Valley Province (Fig. 1 ). Where we cross the Great Valley at Harrisburg, it is called the Cumberland and Lebanon valleys. This section is underlain by lower Paleozoic carbonate, shale, and slate folded and faulted during the lower Paleozoic Taconic orogeny. The prominent ridge on the west flank of the Great Valley is Blue or Kittatinny Ridge. It is the first ridge of the Ridge and Valley Province; the folded and faulted sedimentary rocks of the Appalachian foreland basin, deformed during the Alleghenian orogeny. Drainage during most of the Paleozoic was to the northwest, bringing detritus into the Appalachian foreland basin. The drainage reversed with the opening of the Atlantic Ocean and southeast-flowing streams established courses transverse to the strike of resistant rocks, like the Silurian Tuscarora Sandstone holding up Blue Mountain. West and north of the Ridge and Valley is the Allegheny Plateau, that part of the Appalachian foreland that was only gently deformed during Alleghenian shortening. Our trip will traverse that part of the plateau called the Pocono Plateau which is underlain by Devonian to Penn-sylvanian sandstone. At the conclusion of our trip, we will reverse our transverse of the Appalachians by traveling from the Pocono Plateau to the Ridge and Valley, to the Great Valley, to the Newark Basin, to the Piedmont, and then to one of the great Fall Zone cities—Philadelphia—via the Lehigh and Schuylkill rivers.
SUBDIVISION OF POTTSVILLE FORMATION IN SOUTHERN ANTHRACITE FIELD, PENNSYLVANIA
FRANZ JOSEPH MÄRTER, TRAVEL COMPANION OF JOHANN DAVID SCHÖPF IN A JOURNEY FROM PHILADELPHIA TO FLORIDA AND THE BAHAMAS IN 1783-1784
Multi-proxy provenance of the lower Pennsylvanian Pottsville sandstone of the northern Appalachian basin in Pennsylvania, U.S.A: Paleodrainage, sources, and detrital history
Water-quality trends for a stream draining the Southern Anthracite Field, Pennsylvania
Subsurface Distribution of Hamilton Group of New York and Northern Pennsylvania
Woodland Hypothesis for Devonian Tetrapod Evolution
The early Mesozoic Birdsboro central Atlantic margin basin in the Mid-Atlantic region, eastern United States
Mineralogy of Jacksonburg (Middle Ordovician) Formation in Eastern Pennsylvania and Western New Jersey
EDWARD MILLER’S CONTRIBUTIONS TO THE GEOLOGY OF THE ALLEGHENY PORTAGE RAILROAD (PENNSYLVANIA, U.S.A.)
Base of the Kiaman: Its definition and global stratigraphic significance
Detrital Zircon Evidence of a Recycled Orogenic Foreland Provenance for Alleghanian Clastic-Wedge Sandstones
Abstract A thick sequence (45+ m) of Cretaceous age Potomac Group sediments unconformably overlain by Quaternary Trenton Gravel and Alluvial silts and clays was investigated as part of the planning for and construction of a new 1525-m-long (5000-ft) runway (Runway 8–26) at the Philadelphia International Airport. This runway was constructed over a deleted but deed-restricted U.S. Environmental Protection Agency Superfund site, the Enterprise Avenue Landfill. This sedimentary sequence contains three discrete aquifer units, several of which are included within the recharge zone of the federally designated New Jersey Coastal Plain Sole Source Aquifer. This paper presents an overview of the geology of southwestern Philadelphia in the vicinity of Philadelphia International Airport and the former Enterprise Avenue Landfill area. The field trip through this area will include descriptions of the geology and history of the area, the Runway 8–26 project at the airport, the on-site groundwater mitigation system at the Enterprise Avenue Landfill area, and future enhancements to the airport infrastructure currently under consideration.
Journey into anthracite
Abstract The thickest and most laterally continuous upper Carboniferous molasse in the central Appalachians is located in the Southern Anthracite Field of northeastern Pennsylvania. Substantial deposits extend throughout northeastern Pennsylvania where >90% of the total anthracite (original reserves) in the United States and the thickest coal beds of the eastern United States are located. The abundance of and demand for this resource allowed the region to prosper in the nineteenth and twentieth centuries. In Pottsville, Pennsylvania, the exposed Upper Mississippian to Middle Pennsylvanian molasse reveals a progressive evolution from a semiarid alluvial plain to a semihumid alluvial plain to a humid alluvial plain. The anthracite beds occur and thicken with increased humid conditions. The progression is also exposed in Tamaqua, Pennsylvania, where convenient access to the underlying Lower Mississippian strata is available, thus providing a section of all Carboniferous formations in the region. Finally, in Lansford, Pennsylvania, a renovated deep anthracite mine illustrates the historical methods and working conditions that existed to extract the valuable resource and allow the region to flourish and fuel the Industrial Revolution.