Browsing by Author "Pickett, T.E."
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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 Delaware Clay Resources(Newark, DE: Delaware Geological Survey, University of Delaware, 1970-06) Pickett, T.E.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 Formation is a potential economic clay at virtually all locations sampled. Some Miocene and Pleistocene clays are also possibilities for brick clays. Other Potomac clays are potential sources for glazed tile, sewer pipe, refractory brick, and stoneware. Coastal marsh clays, frequently containing much organic debris, are potential source material for lightweight aggregate used in lightweight, strong concrete products. Lightweight aggregate has the potential for augmenting dwindling reserves of crushed stone and gravel aggregate.Item Delaware's Extractive Mineral Industry(Newark, DE: Delaware Geological Survey, University of Delaware, 1981-01) Doyle, R.G.; Pickett, T.E.The purpose of this report is to provide information on the mining industry of Delaware as an essential component of a growing economy. The industry, particularly in sand and gravel mining, must deal with uneven regulation, land use competition, and environmental pressures. It is hoped that the information gathered here will assist planning and regulatory agencies as well as an interested general public in evaluating the role of the extractive mineral industry.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 Geologic Field Trips In Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1977-05) Benson, R.N.; Hahn, W.F.; Jordan, R.R.; Pickett, T.E.; Talley, J.H.; Thompson, A.M.; Woodruff, K.D.The information contained in this Guidebook was compiled on the occasion of the Annual Meeting of the Association of American State Geologists held in Delaware in June 1977. The Delaware Geological Survey is pleased to have been selected to host this national meeting. The field trip logs were designed to familiarize geologists from across the United States with basic features of Delaware's geology and resources. We have also sought to identify some points of historical and cultural interest that may help the visitor become familiar with our State. Experience has shown that field guides retain their usefulness beyond the event that they initially served. They may assist classes, other groups, and individuals seeking additional information about their physical environment. Therefore, this Guidebook has been published as an Open File Report for public distribution. All users of this information are urged to exercise caution, especially at rock faces and along waterways, and to obtain specific permission for visits from landowners where necessary.Item Geology And Ground Water, University Of Delaware, Newark, Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1972-05) Woodruff, K.D.; Miller, J.C.; Jordan, R.R.; Spoljaric, N.; Pickett, T.E.The results of an intensive ground-water study on University of Delaware lands in the Newark area revealed additional sources of available ground water. Geophysical techniques, air-photo interpretation, studies of existing data, field mapping, test drilling, and pump tests were used as the bases for guiding additional well development. The study, conducted by the Delaware Geological Survey, was a cooperative effort between the University of Delaware and the City of Newark in response to mutual water supply problems. A potential ground-water yield of about 500 gpm was discovered on the University Laird Tract in the Piedmont Province. Ground water available from other locations in the Coastal Plain portion of the study area may total about 175 gpm. However, careful well development and proper well spacing will be necessary to obtain optimum yields.Item Geology of South Central Kent County, Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1986) Benson, R.N.; Pickett, T.E.Item Geology of the Chesapeake and Delaware Canal Area(Newark, DE : Delaware Geological Survey, University of Delaware, 1970) Pickett, T.E.Item Geology of the Dover Area, Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1983) Pickett, T.E.; Benson, R.N.Item Geology of the Middletown-Odessa Area, Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1971) Pickett, T.E.; Spoljaric, N.Item Geology of the Smyrna-Clayton Area, Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1977) Pickett, T.E.; Benson, R.N.Item Guide To Common Cretaceous Fossils Of Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1972-05) Pickett, T.E.This guide contains illustrations of fossils from Delaware Geological Survey Bulletin No. 3 ("Marine Upper Cretaceous Formations of the Chesapeake and Delaware Canal") and Report of Investigations No. 7 ("An Invertebrate Fauna from the Upper Cretaceous of Delaware"). The identifications have been revised to be as accurate as possible so that this guide will be useful to those fossil collectors interested in classifying their "finds."Item Papers Presented By Staff Members Of The Delaware Geological Survey At The Baltimore Meeting Of The Northeastern Section Of The Geological Society Of America, March, 1974(Newark, DE: Delaware Geological Survey, University of Delaware, 1974-05) Pickett, T.E.This report is a compilation of four papers presented by DGS staff members at the Baltimore Meeting of the Northeastern Section of the Geological Society of America, March, 1974.Item Preliminary Report On Seismic Events In Northern Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1972-04) Jordan, R.R.; Pickett, T.E.; Woodruff, K.D.Earthquakes are an unfamiliar phenomenon in Delaware. Because of the great public and scientific interest in the seismic events that have recently affected northern Delaware, this Open File Report has been prepared to present currently available information concerning the earthquakes and the investigation pursued by the Delaware Geological Survey. This is not a final scientific explanation of the events. To many persons it is shocking to realize that the earth that they regard as stable is, in fact, an active body. The present earth is a product of 4.5 billion years of history, during which time most geologic forces have acted so slowly as to be almost imperceptible. Therefore, sudden movements are disturbing. Earthquakes are the vibrations caused by relatively sudden slippage of deeply buried rocks. Earthquakes occur in a vast range of sizes; many are too small to be felt and others cause great damage. The events in Delaware that are described on these pages were relatively small and, although they warrant further study, which may lead to some precautionary measures, they do not represent cause for alarm.Item Preliminary Report On The Earthquake Of February 28, 1973(Newark, DE: Delaware Geological Survey, University of Delaware, 1973-04) Woodruff, K.D.; Jordan, R.R.; Pickett, T.E.This report has been prepared to fill an immediate need for information on the earthquake that affected northern Delaware on February 28, 1973. Public interest in seismic events has grown in the past two years because of a series of small, local events (Jordan et al., 1972) and has been heightened considerably by the event described in this report. Various stresses on and within the earth lead to periodic adjustments or changes by the rocks making up the earth's crust. Many changes are too slow or small to be measured within a human lifetime, but earthquakes can be a very perceptible phenomenon, expressing more rapid adjustment. Indeed, earthquakes in many areas of the world are a serious geologic hazard and a threat to life and property. Thus, it must be recognized that the earth is a dynamic body and its processes are not bound to the convenience of man.Item Selected Papers On The Geology Of Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1980-11) Jordan, R.R.; Pickett, T.E.; Kraft, J.C.; Sheridan, R.E.; Spoljaric, N.; Thompson, A.M.; Woodruff, K.D.; Varrin, R.D.; Leavens, P.B.; Carey, W.L.The Delaware Academy of Science has been instrumental in informing Delaware citizens about science and utilization of local resources. Since 1970 the annual meeting of the Delaware Academy of Science has been used as a time for presentation of ongoing research in various areas of science in the Delaware region. The proceedings of these meetings have resulted in publication of transactions of the Delaware Academy of Science. The 1976 annual meeting focused on aspects of the geology of Delaware. Members of the Delaware Geological Survey and the Geology Department at the University of Delaware contributed papers in their specific disciplines. This volume presents an overview of studies of geological features and processes of evolution of the geology of Delaware. Although this collection of papers does not represent an all-inclusive study of the subject, the selections included in this volume highlight past, present, and future trends in the study of Delaware's geology. It is hoped that the combined bibliographies of all the papers will provide a comprehensive view of the literature for further investigation into the geology of Delaware.