Special Publications
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Special Publications are thematic products on a particular subject, usually fairly narrowly defined and of special interest. DGS Special Publications include multi-paper volumes, posters, charts, and booklets, and range from less technical to highly technical, depending on the subject.
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Item Basic Hydrologic Data For Coastal Sussex County, Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1987-01) Talley, J.H.; Andres, A.S.Item Correlation Chart Of The Coastal Plain Units In New Jersey, Delaware, And Maryland(Newark, DE: Delaware Geological Survey, University of Delaware, 1972-12) Pickett, T.E.Item Cretaceous Fossils From The Chesapeake And Delaware Canal: A Guide For Students And Collectors(Newark, DE: Delaware Geological Survey, University of Delaware, 1988-09) Lauginiger, E.M.Fossil collectors have been attracted to Delaware since the late 1820s when the excavation of the Chesapeake and Delaware (C&D) Canal first exposed marine fossils of Cretaceous age. Since then, many technical and nontechnical works have been written about the fossils. However, there has not been a single source for casual or student collectors to turn to for help in the identification of typical finds. This paper is written to fill that void as well as provide general information about fossils and specific information on geologic formations and collecting localities at the Canal. This report is not designed to be an encyclopedia on the fossils of the Canal but focuses on those fossils found most frequently. The majority of the fossils collected today are from the spoil areas in the vicinity of the Reedy Point Bridge. Thus, the chapter on classification concentrates on the fossils of the Mount Laurel Formation, the stratigraphic unit dredged in that area.Item The Delaware Geological Survey: The Formative Years, 1951-1969(Newark, DE: Delaware Geological Survey, University of Delaware, 1988-06) Groot, J.J.Emphasis is placed herein on the years of Dr. Groot's leadership of the Survey. The remarkable work of James C. Booth in the last century is acknowledged but has elsewhere been entered in history. Some continuing activities of the Survey after 1969 are noted together with comments of an experienced observer; this current period may someday receive the attention of a recorder having the enhanced perspective of time.Item Delaware Piedmont Geology(Newark, DE: Delaware Geological Survey, University of Delaware, 1998) Plank, M.O.; Schenck, W.S.The Red Clay Creek Valley traverses geologic features that have long been recognized as important to science, industry, and history. The reader will note that within the text “Piedmont,” and “Atlantic Coastal Plain” are capitalized. This is because these are formal geologic provinces. The “Fall Line” or “fall zone” is also an important geologic area. The Fall Line is the contact where the hard crystalline rocks of the Piedmont dip under and disappear beneath the sediments of the Coastal Plain. The fall zone is a narrow zone that parallels the Fall Line where rapids and waterfalls are common. The landscape and rock types shown in northern Delaware are classical examples of the larger geologic features that dominate the geology of eastern North America.Item Delaware: Its Rocks, Minerals, And Fossils(Newark, DE: Delaware Geological Survey, University of Delaware, 1992) DGS StaffMinerals are naturally occurring, inorganic substances with characteristic physical and chemical properties. Common examples found in Delaware are quartz (hard, glassy luster), mica (cellophane like pieces), and feldspar (waxy or pearly luster, cleavage). In nature minerals are usually found in mixtures with other minerals. A natural specimen containing several minerals is called "a rock." A common example is granite, which is a mixture of quartz, feldspar, mica, and usually other dark minerals. Fossils are any evidence, direct or indirect, of a pre-existing plant or animal in the rock record. The most popular area for collecting fossils in Delaware is the Chesapeake and Delaware Canal area.Item Digital Elevation Model of Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 2017-09) Wang, L.TThe Delaware Geological Survey led a multi-agency, state and federal effort (including DelDOT, DNREC, USGS, and NOAA) to secure funds from the Hurricane Sandy Relief appropriation to collect new, high-quality LiDAR for the entire state of Delaware. LiDAR, which stands for Light Detection and Ranging, is a remote sensing method that uses light in the form of a pulsed laser to measure distances from a source to a target object. Typically, a LiDAR device is attached to the bottom of a plane and is pointed at the ground. The time it takes the pulse to return represents the distance it traveled and can be used to generate precise, three-dimensional information about the landscape below and its surface characteristics. Shown here is an elevation dataset derived from the LiDAR data that will help to enhance watershed modeling for predicting stream flooding, produce up-to-date topographic maps, predict and assess the impacts of storm surge and sea-level rise, improve our geologic and land-use mapping, measure changes in marshes and wetlands, and much more.Item Earthquake Basics(Newark, DE: Delaware Geological Survey, University of Delaware, 2000) Baxter, S.J.This report provides a brief overview of the causes of earthquakes, how earthquakes are measured, and a glossary of earthquake terminology.Item Generalized Geologic Map of Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1976-04) Pickett, T.E.; Spoljaric, N.; Jordan, R.R.Item Generalized Geologic Map Of Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1966-08) Spoljaric, N.; Jordan, R.R.The Generalized Geologic Map of Delaware is a brief summary for general use indicating the major types and locations of rocks present throughout the State, and their interrelationships. The map is preliminary as it is a first step in a continuing program of detailed geologic mapping. It is based upon many existing sources of data; additional detail may be found in the references listed.Item Generalized Geologic Map of Delaware, Postcard(Newark, DE: Delaware Geological Survey, University of Delaware, 2000) DGS StaffDelaware’s oldest rocks are metamorphic crystalline rocks of the central Appalachian Piedmont Physiographic Province. Atlantic Coastal Plain sediments overlie the crystalline rocks of the Piedmont and range in thickness from a feather edge at the Fall Line to approximately 9,000 feet in the southeastern corner of Delaware. Sediments range in age from Early Cretaceous to Holocene.Item Geology and Earth Resources of Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1968) DGS StaffItem Geology And Paleontology Of The Lower Miocene Pollack Farm Fossil Site Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1998) Benson, R.N.The Pollack Farm Site near Cheswold, Delaware, is named for a borrow pit excavated during highway construction. The excavation exposed a portion of the Cheswold sands of the lower Miocene Calvert Formation. Two sand intervals (Cheswold C-3 and C-4) yielded a diverse assemblage of land and marine vertebrate remains and more than 100 species of mollusks. An isolated occurrence of a sandy silt (the radiolarian bed) stratigraphically between the two macrofossil-bearing units yielded only siliceous microfossils—radiolarians, diatoms, and sponge spicules.Item Historical Coastline Changes of Cape Henlopen, Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 2001) Ramsey, K.W.; Wang, L.T.Coastlines are not static features. They are shaped by the daily effects of wind, current, and wave activity. Over time, a coastline may move landward due to relative sea-level rise or low sediment supply, or seaward due to relative sea-level fall or an overabundance of sediment. Perhaps the most striking example of shoreline movement in Delaware is at Cape Henlopen which has grown northward approximately one mile in the last 160 years. Maps and aerial photographs show these changes.Item The Hurricane of October 21-24, 1878(Newark, DE: Delaware Geological Survey, University of Delaware, 2002) Ramsey, K.W.; Reilly, M.J.On October 21, 1878, a hurricane crossed the island of Cuba and headed east of Key West, Florida. On the evening of October 22, it made landfall north of Cape Lookout, North Carolina, as a low Category 2 hurricane with winds around 100 mph. The storm picked up speed after landfall and moved northward at a rate of greater than 40 mph and maintained tropical storm force wind speeds of greater than 60 mph with gusts much higher. On the morning of October 23, it passed up the west side of the Chesapeake Bay near the cities of Baltimore and Annapolis, Maryland, Wilmington, Delaware, and Philadelphia, Pennsylvania. By the late afternoon it had reached Albany, New York, and turned eastward and passed out to sea north of Boston, Massachusetts, on the morning of October 24.Item Instructions For Preparation Of Delaware Geological Survey Data Base Schedules(Newark, DE: Delaware Geological Survey, University of Delaware, 1984-01) Talley, J.H.; Windish, D.C.; Ramsey, K.W.This report contains the new DGS data schedules, describes the information that should be recorded on each schedule, and presents instructions for preparation of the schedules. The schedules are designed to make various kinds of data consistent with the input format screens utilized in the automated system.Item Laboratory Procedures Manual(Newark, DE: Delaware Geological Survey, University of Delaware, 1987-05) Kramer, M.G.; DGS Staff; Smith, C.T.Laboratory analyses of geologic samples are performed on a regular basis at the Delaware Geological Survey (DGS). These analyses produce valuable information used to assist the production of geologic and hydrologic maps and reports. Procedures used by the DGS for analyzing various aspects of geologic samples are described in this manual. The purpose of this manual is to standardize and document these procedures. Care and skill in laboratory operations are essential to the quality of the resulting interpretations.Item Long-Range Plan For Water Resources Investigations In Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1961-02) DGS StaffIn order to obtain sufficient data which will enable the State to develop its water resources to the fullest extent of which they are capable, a series of systematic investigations is necessary. A long-range plan describing these studies is the subject of this report. A brief discussion of water in Delaware is presented first to provide a proper background for the long-range plan. The plan itself merely outlines the overall objectives and types of investigational work that must be pursued if the State is to develop its water resources wisely.Item Memoir of the Geological Survey of the State of Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1841) Booth, J.C.The following report of the geological survey of the state of Delaware, conducted in the years 1837 and 1838, embraces all the observations and examinations which were made during the continuance of the survey, including those contained in the first and second annual reports, already laid before the legislature.Item Operations Manual University Of Delaware Drilling Rig(Newark, DE: Delaware Geological Survey, University of Delaware, 1986-06) Bounds, R.E.This manual has been prepared to promote safe, efficient use of a research tool that is of great importance in Delaware.