PA Department of Conservation & Natural ResourcesPoints representing the location of proglacial lake sediments observed in northeastern Pennsylvania during detailed reconnaissance mapping at 1:24,000 scale. Data is added as new maps are prepared for publication. Features that have not yet been formally published will have "Provisional" in their STATUS attribute, while features that have been formally published will have a value of "Final." Both the attributes and geometry of provisional features are subject to change.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/3fad9334dd1b4e52aff1cbdc52fb2815_8engPennsylvania Department of Conservation and Natural Resources Open Data PortalPublicSurficial Geology of Pennsylvania - Varves [Pennsylvania]Web servicesPennsylvaniaLast Modified: 2026-01-08