7 Geologic mapping in the digital age: products, workflows, and methodologies (Posters)

This session will highlight geologic maps and their derivatives, showcasing products that leverage innovative digital methods and workflows, novel application of remote sensing data, and integration of advanced data processing techniques.

Sunday, 22 March 2026
8:00 AM - 12:00 PM
CCC, Ballroom C

Spatial Distribution of Karst Features in South-Central and Southeastern Pennsylvania Carbonate Formations and Implications for Hazard Mitigation

Paper number: 7-11
Program: Technical Sessions
Time: 8:00 AM – 8:00 AM

Authors

Abstract

Sinkholes represent a persistent geologic hazard in Pennsylvania, ranging from localized ground subsidence to events that disrupt infrastructure, transportation, and community safety. This study investigates the spatial relationship between carbonate lithologic formations and the occurrence of karst features across Southcentral and Southeastern Pennsylvania to identify formations that may exhibit elevated sinkhole susceptibility. Geographic Information Systems (GIS) analysis was conducted using karst feature data from the Pennsylvania Department of Conservation and Natural Resources.

Results indicate that while karst features are present across most carbonate lithologies, their spatial density varies significantly across the study area. Formations such as the Rickenbach Formation and Nittany Formation exhibit higher densities of karst features per unit area. Mapping areas of elevated karst feature density enables the identification of zones that may be associated with increased sinkhole risk, which can intersect with developed and populated regions. When overlaid with population data from the U.S. Census Bureau, these areas could be evaluated in relation to population distribution. Subsurface conditions within these areas may pose heightened risks to infrastructure and community safety, emphasizing the value of geologic spatial analysis for hazard assessment.

Beyond geological interpretation, these findings have important implications for emergency management and land use planning. Identifying formations with higher karst feature density can support hazard mapping, infrastructure planning, and prioritization of monitoring efforts in karst-prone regions. Integrating geologic spatial analysis with emergency management frameworks will support informed decision-making and enable the development of mitigation strategies tailored to diverse land-use, infrastructure, and planning contexts.

Geological Society of America Abstracts with Programs. Vol. 58, No. 2

doi: 10.1130/abs/2026NE-411142

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