Browsing DGS Bulletins by Issue Date

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  • Ground-Water Problems In Highway Construction And Maintenance 
    Rasmussen, W.C.; Haigler, E.B. (Newark, DE: Delaware Geological Survey, University of Delaware, 1953)
    This report discusses the occurrence of ground water in relation to certain problems in highway construction and maintenance. These problems are: the subdrainage of roads; quicksand; the arrest of soil creep in road cuts; ...
  • Geology and Ground-Water Resources of the Newark Area, Delaware with a section on the Surface Water Resources 
    Groot, J.J.; Rasmussen, W.C.; Hulme, A.E. (Newark, DE: Delaware Geological Survey, University of Delaware, 1954-04)
    This report describes the geological and lithological conditions in the Newark area, and the occurrence, quantity, and quality of the available ground-water supply. Newark is located on the Fall Line, the boundary between ...
  • Marine upper cretaceous formations of the Chesapeake and Delaware Canal 
    Organist, D.M.; Richards, H.G.; Groot, J.J. (Newark, DE: Delaware Geological Survey, University of Delaware, 1954-11)
    In the Coastal Plain of Delaware, the non-marine Cretaceous sands and clays are separated from the Tertiary formations by a series of marine formations of Upper Cretaceous age. The sedimentary and hydrologic characteristics ...
  • Preliminary Report On The Geology And Ground-Water Resources Of Delaware 
    Marine, I.W.; Rasmussen, W.C. (Newark, DE: Delaware Geological Survey, University of Delaware, 1955-05)
    Delaware has an abundant supply of ground water of a quality suitable for most purposes. About 30 million gallons of water a day was pumped from the ground in 1954. It is estimated that this is roughly 1/16 of the optimum ...
  • Sedimentary Petrology Of The Cretaceous Sediments Of Northern Delaware In Relation To Paleogeographic Problems 
    Groot, J.J. (Newark, DE: Delaware Geological Survey, University of Delaware, 1955-07)
    The non-marine Cretaceous sediments of northern Delaware older than the Magothy formation cannot be divided accurately into formations or mappable geologic units because their lithologic characteristics are very similar. ...
  • The Water Resources Of Northern Delaware 
    Rasmussen, W.C.; Groot, J.J.; Martin, R.O.R.; McCarren, E.F.; Behn, V.C. (Newark, DE: Delaware Geological Survey, University of Delaware, 1957-06)
    Northern Delaware, the area above the Chesapeake and Delaware Canal in New Castle County, is an area of rapidly growing population and expanding industry. In some places the demand for water has reached or exceeded the ...
  • Engineering Materials Of Northern New Castle County 
    Ward, R.F.; Groot, J.J. (Newark, DE: Delaware Geological Survey, University of Delaware, 1957-11)
    This investigation was undertaken to locate deposits of rock, sand, gravel, fill and borrow in northern New Castle County which may be potential sources of material for highway construction, and to prepare maps and ...
  • Water Resources Of Sussex County, Delaware 
    Rasmussen, W.C.; Wilkens, R.A.; Beall, R.M.; Others (Newark, DE: Delaware Geological Survey, University of Delaware, 1960-12)
    Sussex County is in the Atlantic Coastal Plain. Its relatively flat, featureless topography is characterized by two terrace-like surfaces; the lower one rises from sea level to about 40 feet above sea level, and the higher ...
  • Stratigraphy Of The Sedimentary Rocks Of Delaware 
    Jordan, R.R. (Newark, DE: Delaware Geological Survey, University of Delaware, 1962-11)
    The stratigraphy of the Coastal Plain of Delaware is discussed with emphasis placed upon an appraisal of the stratigraphic nomenclature. A revised stratigraphic column for Delaware is proposed. Rock stratigraphic units, ...
  • Salinity Of The Delaware Estuary 
    Cohen, B.; McCarthy, L.T. Jr. (Newark, DE: Delaware Geological Survey, University of Delaware, 1963-02)
    The purpose of this investigation was to obtain data on and study the factors affecting the salinity of the Delaware River from Philadelphia, Pa., to the Appoquinimink River, Del. The general chemical quality of water in ...
  • Ground-Water Resources Of Southern New Castle County Delaware 
    Rima, D.R.; Coskery, O.J.; Anderson, P.W. (Newark, DE: Delaware Geological Survey, University of Delaware, 1964-03)
    Southern New Castle County has a land area of 190 square miles in north-central Delaware. It is predominantly a rural area with a population of about 9,000 people who are engaged chiefly in agriculture. By and large, the ...
  • Columbia (Pleistocene) Sediments Of Delaware 
    Jordan, R.R. (Newark, DE: Delaware Geological Survey, University of Delaware, 1964-09)
    The Columbia deposits of Delaware form a sheet of sand with a maximum thickness of approximately 150 feet which covers most of the Coastal Plain portion of the State. The dispersal pattern, deduced from foreset dip directions ...
  • Geology, Hydrology, And Geophysics Of Columbia Sediments In The Middletown-Odessa Area, Delaware 
    Spoljaric, N.; Woodruff, K.D. (Newark, DE: Delaware Geological Survey, University of Delaware, 1970-08)
    Columbia sediments in the Middletown-Odessa area are composed of boulders, gravels, sands, silts and clays. These sediments are exposed in four gravel pits where their structures and textures were studied. Subsurface geology ...
  • Hydrology Of The Columbia (Pleistocene) Deposits Of Delaware: An Appraisal Of A Regional Water-Table Aquifer 
    Johnston, R.H. (Newark, DE: Delaware Geological Survey, University of Delaware, 1973-06)
    The Columbia (Pleistocene) deposits of Delaware form a regional water-table aquifer, which supplies about half the ground water pumped in the State. The aquifer is composed principally of sands which occur as channel ...
  • Digital Model Of The Unconfined Aquifer In Central And Southeastern Delaware 
    Johnston, R.H. (Newark, DE: Delaware Geological Survey, University of Delaware, 1977-05)
    The unconfined aquifer in central and southeastern Delaware occurs as a southward-thickening blanket of fine to coarse sand, and is recharged almost totally by precipitation and discharge is principally by seepage to ...
  • Ground-Water Resources Of The Piney Point And Cheswold Aquifers In Central Delaware As Determined By A Flow Model 
    Leahy, P.P. (Newark, DE: Delaware Geological Survey, University of Delaware, 1982-07)
    A quasi three-dimensional model was constructed to simulate the response of the Piney Point and Cheswold aquifers underlying Kent County, Delaware to ground-water withdrawals. The model included the Magothy, Piney Point, ...
  • Geological Studies Of Cretaceous And Tertiary Section, Test Well Je32-04, Central Delaware 
    Benson, R.N.; Jordan, R.R.; Spoljaric, N (Newark, DE: Delaware Geological Survey, University of Delaware, 1985-06)
    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 Delaware. The section ...
  • Clay And Clay-Size Mineral Composition Of The Cretaceous-Tertiary Section, Test Well Je32-04, Central Delaware 
    Spoljaric, N. (Newark, DE: Delaware Geological Survey, University of Delaware, 1988-09)
    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 zones on the basis ...
  • Geology And Hydrology Of The Cockeysville Formation Northern New Castle County, Delaware 
    Woodruff, K.D.; Plank, M.O.; Werkheiser, W.H. (Newark, DE: Delaware Geological Survey, University of Delaware, 1995)
    The effect of rapid growth in the Hockessin and Pleasant Hill areas in northern Delaware has caused concern about possible declines in ground-water recharge to the underlying Cockeysville Formation. The Cockeysville is a ...
  • Stratigraphy Of The Post-Potomac Cretaceous-Tertiary Rocks Of Central Delaware 
    Benson, R.N.; Spoljaric, N. (Newark, DE: Delaware Geological Survey, University of Delaware, 1996)
    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) Canal and Dover. Geophysical ...

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