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GM14 Geologic Map of Kent County, Delaware
This map shows the surficial geology of Kent County, Delaware at a scale of 1:100,000. Maps at this scale are useful for viewing the general geologic framework on a county-wide basis, determining the...
View ArticleA Summary of the Geologic History of Delaware
The State of Delaware is located within two physiographic provinces, the Appalachian Piedmont and the Atlantic Coastal Plain. The Fall Zone divides these two provinces and essentially runs parallel to...
View ArticleGeologic History of the Delaware Coastal Plain
In Delaware, the oldest unit of the Atlantic Coastal Plain is the Potomac Formation. Sediment eroded from the Appalachian Mountains was deposited in rivers and swamps in a tropical climate along the...
View ArticleCoastal Plain Rock Units (Stratigraphic Chart)
The geology of Delaware includes parts of two geologic provinces: the Appalachian Piedmont Province and the Atlantic Coastal Plain Province. The Piedmont occurs in the hilly northernmost part of the...
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B17 Geological Studies of Cretaceous and Tertiary Section, Test Well Je32-04,...
A cored well 1,422 feet (433 meters) deep drilled two miles southeast of Dover is the basis for this integrated study of the lithology and paleontology of the Cretaceous-Tertiary section in central...
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B18 Clay and Clay-Size Mineral Composition of the Cretaceous-Tertiary...
This study complements Delaware Geological Survey Bulletin No. 17 and deals exclusively with clays and clay-size minerals. The cored section at the location of Je32-04 has been subdivided into 25 clay...
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B20 Stratigraphy of the Post-Potomac Cretaceous-Tertiary Rocks of Central...
This Bulletin presents the subsurface stratigraphy of the post-Potomac Cretaceous and Tertiary rocks of the Atlantic Coastal Plain of central Delaware, between the Chesapeake and Delaware (C & D)...
View ArticleWhat is a fossil?
If you think you may have found a Delaware dinosaur or any unusual fossil, the scientists at the Delaware Geological Survey at the University of Delaware, Newark campus would like to see it. It could...
View ArticleHydrologic Stratigraphic Chart
The following table displays the correlation of hydrologic units to geologic units recognized by the Delaware Geological Survey in the Atlantic Coastal Plain and Appalachian Piedmont.
View ArticleDeal Formation
It is a clayey, calcareous, shelly, glauconitic (10-20 percent) silt. Its colors range from greenish-gray and gray-green to brownish-gray and light gray. It is rich in calcareous and siliceous...
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