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All about the Delaware Geological Survey

Download geologic and hydrologic maps and datasets

Information about the Geology and Hydrogeology of Delaware

Learn about fossils found in Delaware

Hydrogeologic data and information for Delaware

The Delaware Geological Survey publication catalog

Research and educational projects of the DGS

Summary of Water Conditions in Delaware

DGS Annual Report of Programs and Activities

DGS Story Map Gallery

Meet the people that make up the DGS

Did you feel an earthquake? Complete our Earthquake Felt Report.

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Latest News

Celebrate Geologic Map Day on October 13, 2023
Earth Science Week is October 8 - 14, 2023 - 'Geoscience Innovating for Earth and People'
PRESS RELEASE: Delaware Geological Survey releases report on aquifers and groundwater pumping in Kent and Sussex Counties
PRESS RELEASE: RI 84 "Estimating Evapotranspiration for 2016 Growing Season Using Landsat 8 Data and Metric Model in Sussex County, Delaware”

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Did You Know?

Delaware State Mineral - Sillimanite

In 1977, the Delaware General Assembly, acting on a proposal by the Delaware Mineralogical Society, established sillimanite as the Delaware State…