Browsing DGS Reports of Investigations by Title

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  • Groot, J.J.; Ramsey, K.W.; Wehmiller, John F. (Newark, DE: Delaware Geological Survey, University of Delaware, 1990-02)
    The microflora of the Bethany formation and the lower part of the Beaverdam Formation is characterized by a Quercus-Carya assemblage, very few non-arboreal pollen, and Pterocarya and Sciadopitys as exotic constituents. ...
  • Martin, M.J.; Andres, A.S. (Newark, DE: Delaware Geological Survey, University of Delaware, 2008)
    A multiple linear regression method was used to estimate water-table elevations under dry, normal, and wet conditions for the Coastal Plain of Delaware. The variables used in the regression are elevation of an initial water ...
  • Woodruff, K.D. (Newark, DE: Delaware Geological Survey, University of Delaware, 1971-06)
    The feasibility of using geophysical techniques in determining the amount of overburden and the nature of the subsurface along a proposed highway was tested in the Piedmont area of Delaware. The area is underlain by ...
  • Plank, M.O.; Schenck, W.S.; Srogi, L.A. (Newark, DE: Delaware Geological Survey, University of Delaware, 2000)
    This report accompanies a new map that revises the original bedrock geologic maps of the Delaware Piedmont compiled by Woodruff and Thompson and published by the Delaware Geological Survey (DGS) in 1972 and 1975. Combined ...
  • Andres, A.S. (Newark, DE: Delaware Geological Survey, University of Delaware, 2004)
    Because of the rapid development occurring in coastal Delaware and the importance of ground water to the economy of the area, definition of formal lithostratigraphic units hosting aquifers and confining beds serves a useful ...
  • Talley, J.H. (Newark, DE: Delaware Geological Survey, University of Delaware, 1975-06)
    Analyses of drillers' and geophysical logs, cuttings, and 29 core samples from well Nc13-3 near Greenwood, Sussex County, Delaware indicate that the 1500-foot section penetrated by the drill can be divided into seven ...
  • Andres, A.S.; Howard, C.S. (Newark, DE: Delaware Geological Survey, University of Delaware, 2000)
    The Cypress Swamp of Sussex County, Delaware, is underlain by a body of late Pleistocene- to Holocene-age unconsolidated sediments. They form a mappable geologic unit herein named the Cypress Swamp Formation. Deposits of ...
  • Pickett, T.E. (Newark, DE: Delaware Geological Survey, University of Delaware, 1970-06)
    Forty-eight samples of Delaware clays were collected and tested jointly by the Delaware Geological Survey and the U. S. Bureau of Mines. Clays potentially useful for face brick are common. The nonmarine Cretaceous Potomac ...
  • Leahy, P.P. (Newark, DE: Delaware Geological Survey, University of Delaware, 1979-06)
    A two-dimensional digital model was developed to simulate the effects of increased pumping on the Piney Point aquifer in Kent County, Delaware. The calibrated digital model was used to predict water-level declines as the ...
  • Woodruff, K.D. (Newark, DE: Delaware Geological Survey, University of Delaware, 1984-07)
    Earthquakes in Delaware and surrounding areas have been well documented historically since about the early 1700’s and since 1972 by instrumental records. Most of the Delaware events have occurred in the Wilmington area ...
  • Denver, J.M. (Newark, DE: Delaware Geological Survey, University of Delaware, 1989-06)
    The unconfined aquifer is a major source of water supply in eastern Sussex County, Delaware. It also is an important source of water for surface-water bodies and deeper, confined aquifers. The aquifer consists mainly of ...
  • Andres, A.S. (Newark, DE: Delaware Geological Survey, University of Delaware, 1987-06)
    The results of water-budget and flow-net model calculations indicate that the rate of fresh ground-water discharge into Rehoboth and Indian River bays is in the range of 21 to 43 million gallons per day. The estimates ...
  • Andres, A.S.; Martin, M.J. (Newark, DE: Delaware Geological Survey, University of Delaware, 2005)
    A geographic information system-based study was used to estimate the elevation of the water table in the Inland Bays watershed of Sussex County, Delaware, under dry, normal, and wet conditions. Evaluation of the results ...
  • McKenna, K.K.; Ramsey, K.W. (Newark, DE: Delaware Geological Survey, University of Delaware, 2002)
    Lithologic logs from 268 vibracores taken from the Delaware Atlantic offshore were evaluated for sediment type and compatibility with historical beach sediment textures. A model of sand resource evaluation, known as ...
  • Bonini, W.E. (Newark, DE: Delaware Geological Survey, University of Delaware, 1967-06)
    Pleistocene channels along the margins of the Atlantic Coastal Plain are developed in crystalline and Triassic sediments (Bonini and Hickok, 1958), or into the Cretaceous and Tertiary coastal plain sediments (Widmer, 1965). ...
  • Doheny, E.J. (Newark, DE: Delaware Geological Survey, University of Delaware, 1998)
    The stream-gaging network in Delaware is a major component of many types of hydrologic investigations. To ensure that the network is adequate for meeting multiple data needs by a variety of users, it must represent the ...
  • Baker, W.W.; Varrin, R.D.; Groot, J.J.; Jordan, R.R. (Newark, DE: Delaware Geological Survey, University of Delaware, 1966-03)
    At present, Delaware has an abundance of water for the foreseeable future, but is already faced with water problems in some municipalities. These can only be resolved satisfactorily through complete evaluation of the State's ...
  • Spoljaric, N. (Newark, DE: Delaware Geological Survey, University of Delaware, 1979-12)
    This report was prepared to provide a concise description of offshore operations related to exploration for petroleum (oil and natural gas) from the initial geologic and geophysical investigations to production. Petroleum ...
  • Woodruff, K.D. (Newark, DE: Delaware Geological Survey, University of Delaware, 1970-07)
    Information on ground-water quality in Delaware has become critical for three reasons: (1) increased water demand, (2) need for a better understanding of ground-water flow patterns, (3) need for a "base" against which ...
  • Plank, M.O.; Srogi, L.A.; Schenck, W.S.; Plank, T.A. (Newark, DE: Delaware Geological Survey, University of Delaware, 2001)
    Geochemical data from Ordovician and Silurian mafic rocks in the Wilmington Complex in Delaware, the James Run Formation in Cecil County, Maryland, and the Wissahickon Formation in Delaware and Pennsylvania were collected ...

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