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Spacer ImageOpen-file Report 2024-19: Aggregate resource potential reconnaissance mapping of the Middle Peninsula, Virginia
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By Hawkins, D.W. and Schmidt, L.N., 2025, 34 p., 1 Plate, and 4 appendices. Resilience refers to a community’s ability to adapt to changes from increased hazards due to natural and anthropogenic forcings. Initiatives to better prepare municipalities and establish protective measures are a key focus in the Virginia coastal zone as the region experiences one of the highest rates of sea level rise on the East Coast. The Virginia Department of Energy’s Geology and Mineral Resources Program conducted a study of potential sand, gravel, and clay aggregate resources in a portion of the Coastal Plain. This one-year effort was funded in part by the Virginia Coastal Zone Management (CZM) Program through a grant provided by the U.S. National Oceanic and Atmos-pheric Administration (NOAA). The focus for this pilot phase of assessment was Virginia’s Middle Peninsula, which encompasses almost 900 thousand acres, with over a 1,000 miles of shoreline. Virginia Energy staff conducted a multiparameter geospatial analysis in ArcGIS including the comparison of topographic, geologic and soil maps, borehole data, occurrences of mine sites, tex-tural data, and the presence of sensitive habitat such as wetlands. Staff also visited active mine sites across the project area for field mapping and characterization of existing aggregate materials. The majority of potential sand and gravel deposits identified in study are within Pleistocene fluvial-estuarine terraces, extending into older Pliocene units. Clay resources are typically limited to Mio-cene Chesapeake Group marine units. These data can support resilience initiatives that were identi-fied in the 2021 Virginia Coastal Resilience Master Plan, which include efforts to mitigate wide-spread habitat loss, impacts to critical infrastructure, and potential residential displacement due to increased coastal flooding. Planners and contractors who are interested in materials for elevating roads, shoring up existing structures, providing shoreline protection, and restoring wetland habitats can utilize the data to understand where potential resources may occur. This technical summary report contains a 1:100,000-scale map showing sand and gravel potential (Plate 1). A Geologic Map Schema (GeMS) Level-3 compliant geodatabase, resources, and associ-ated metadata are included within the zip folder for download. Users should consult this report for details on methodology and criteria used for the resource potential analysis. Additional information is available within the report appendices including a field log of site visits, lithologic and geochem-ical data for samples, and a summary of project coordination activities throughout the grant. Online only.
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