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Landslides in the vicinity of Pittsburgh, Pennsylvania

By
Richard E. Gray
Richard E. Gray
DiGioia, Gray & Associates LLC, 570 Beatty Road, Monroeville, Pennsylvania 15146, USA
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James V. Hamel
James V. Hamel
Hamel Geotechnical Consultants, 1992 Butler Drive, Monroeville, Pennsylvania 15146 USA
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William R. Adams, Jr.
William R. Adams, Jr.
Pennsylvania Department of Transportation, 45 Thoms Run Road, Bridgeville, Pennsylvania 15017, USA
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Published:
January 01, 2011

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.

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Contents

GSA Field Guide

From the Shield to the Sea

Richard M. Ruffolo
Richard M. Ruffolo
GAI Consultants, Inc. Pittsburgh Office 385 East Waterfront Drive Homestead, Pennsylvania 15120-5005 USA
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Charles N. Ciampaglio
Charles N. Ciampaglio
Wright State Universityâ?"Lake Campus 7600 Lake Campus Drive Celina, Ohio 45822 USA
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Geological Society of America
Volume
20
ISBN electronic:
9780813756202
Publication date:
January 01, 2011

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