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all geography including DSDP/ODP Sites and Legs
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North America
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land use (2)
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limestone deposits (1)
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marble deposits (1)
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Bearpaw Formation (1)
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metal ores
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metasomatism (2)
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mineral resources (1)
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North America
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Appalachian Basin (1)
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Appalachians
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oxygen
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O-18/O-16 (1)
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paleoecology (1)
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Paleozoic
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Carboniferous
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Lower Mississippian
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Pocono Formation (1)
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Pennsylvanian
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Conemaugh Group (4)
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Middle Pennsylvanian
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Allegheny Group (2)
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Monongahela Group (3)
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Upper Pennsylvanian
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Ames Limestone (2)
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Virgilian
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Shawnee Group (1)
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Devonian
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Middle Devonian
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Marcellus Shale (1)
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chemically precipitated rocks
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clastic rocks
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coal (1)
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gas shale (1)
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sedimentary structures
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bedding plane irregularities (1)
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planar bedding structures
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sedimentation (1)
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sediments
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clastic sediments
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slope stability (5)
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soils (1)
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underground installations (1)
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United States
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Allegheny Mountains (1)
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Arizona
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Gila County Arizona (1)
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Mogollon Rim (1)
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California
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Orange County California (1)
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San Diego County California
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San Diego California (1)
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San Francisco Bay region (1)
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San Mateo County California (1)
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Colorado Plateau (1)
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Dunkard Basin (1)
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Minnesota (1)
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Ohio
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Hamilton County Ohio
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Cincinnati Ohio (1)
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Ohio River (3)
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Pennsylvania
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Allegheny County Pennsylvania
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Pittsburgh Pennsylvania (9)
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-
Armstrong County Pennsylvania (1)
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Butler County Pennsylvania (1)
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Chester County Pennsylvania (1)
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Clarion County Pennsylvania (1)
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Indiana County Pennsylvania (1)
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Jefferson County Pennsylvania (1)
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Philadelphia County Pennsylvania (1)
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Venango County Pennsylvania (1)
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Westmoreland County Pennsylvania (2)
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waste disposal (1)
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water resources (1)
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sedimentary rocks
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sedimentary rocks
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carbonate rocks
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limestone (1)
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chemically precipitated rocks
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chert (1)
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clastic rocks
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claystone (1)
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sandstone (3)
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shale (3)
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coal (1)
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gas shale (1)
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sedimentary structures
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sedimentary structures
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bedding plane irregularities (1)
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planar bedding structures
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bedding (1)
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sediments
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sediments
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clastic sediments
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colluvium (1)
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sand (1)
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soils
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soils (1)
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
Allegheny County Pennsylvania
Re-evaluation of the 1941 Rock Slide at Brilliant Cut, Pittsburgh, Pennsylvania
Evidence of hydrothermal alteration in Devonian shales from the Eastern Gas Shales Project 2 core of the Rome trough, Appalachian Basin, United States
Geophysical Investigations of United States Revolutionary War Era (1777–1778) Mass Burial Sites in Pennsylvania, USA
Engineering Geology, History and Geography of the Pittsburgh, Pennsylvania Area
Abstract This guidebook provides detailed itineraries of three of the geological field trips related to the 2017 joint meeting of the GSA Northeastern and North-Central Sections in Pittsburgh. The first chapter outlines a walking trip of downtown Pittsburgh and the escarpment to its south, consisting of seven “Pitt stops” investigating geological, archaeological, and historical aspects of the Gateway to the West. Venturing further afield, the second chapter describes a trip that explores periglacial features as far as the Upper Youghiogheny River basin in Maryland and the Laurel Highlands of Pennsylvania. The third chapter investigates hydrologic aspects of the 1889 Johnstown, Pennsylvania, flood, largely following the progress of the flood from its point of origin to the city of Johnstown.
Abstract This guidebook chapter outlines a walking tour that provides an introduction to the geological, archaeological, and historical setting of Pittsburgh, with an emphasis on the use of local and imported geologic materials and resources in the eighteenth and nineteenth centuries. The focus is on downtown Pittsburgh, the low-lying triangle of land where the Monongahela and Allegheny Rivers join to form the Ohio River, and Coal Hill (Mount Washington), the escarpment along the Monongahela River to its south. Topics include the importance of—and concomitant effect of—historic coal use; use of local and imported geologic materials, including dimension stone used for buildings and gravestones, and chert used for gunflints and millstones; the frontier forts built at the site; and the ubiquitous landslides along Coal Hill.
Abstract The Pittsburgh region has long been recognized as one of major landslide activity. This results from the geology and geomorphic processes shaping the region. The underlying bedrock of flat-lying interbedded strong and weak sedimentary strata has been acted upon by erosion, stress relief, and mass wasting, including creep and landsliding processes, to produce masses of marginally stable colluvial rock and soil on many of the steep hillsides common to the region. Landsliding often involves re-activation of such rock and soil masses. Recent landsliding is often triggered by heavy precipitation and by human activities, i.e., slope excavation, fill placement, and changes in long-established patterns of surface and subsurface drainage. This field trip has four stops, all within 20 mi of downtown Pittsburgh. Each stop is along a transportation corridor (railroad, local road, and two along an interstate highway). Each stop has various sized examples of the types of landslides common to the region. Most of these examples involve reactivation of unrecognized colluvial landslide masses.
Abstract Western Pennsylvania is rich in oil history, and many of the fledgling petroleum industry’s “firsts” happened right here between the late nineteenth and early tentieth centuries. First and foremost, it is home to the Drake well, the first-ever economic well intentionally drilled to produce oil. In addition, western Pennsylvania has bragging rights to various industry advancements, from the way geologic samples were collected and interpreted, to how wells were drilled and stimulated for production, to early oil refining techniques, marketing, and production. In this field guide, we discuss the petroleum geology and history of estern Pennsylvania in general and three important oil-producing sites in particular: (1) the McClintock #1 well, Rouseville; (2) the Drake well, Titusville; and (3) Muddy Creek oil field, Prospect. Each of these sites produced oil from Upper Devonian reservoirs and spurred additional petroleum exploration and development in the central Appalachian basin.