DGS Bulletins
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Browsing DGS Bulletins by Author "Jordan, R.R."
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Item Columbia (Pleistocene) Sediments Of Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1964-09) Jordan, R.R.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 of cross-bedding, indicates that the sediment entered the study area from the northeast, i.e., from the direction of the valley of the Delaware River between Wilmington and Trenton, and spread south and southeast over Delaware.Item Geological Studies Of Cretaceous And Tertiary Section, Test Well Je32-04, Central Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1985-06) Benson, R.N.; Jordan, R.R.; Spoljaric, NA 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 is subdivided into lithostratigraphic, biostratigraphic, chronostratigraphic, and heavy mineral units. Data and results are presented on a common base in three plates.Item Stratigraphy Of The Sedimentary Rocks Of Delaware(Newark, DE: Delaware Geological Survey, University of Delaware, 1962-11) Jordan, R.R.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, based mainly on data from certain key wells, are described and the published names which have been or which might conceivably be applied to those units are reviewed. In each case a name is chosen and the reasons for the choice are stated. The relationships between the column established for Delaware and the recognized columns for adjacent states are considered. The rock units of the Coastal Plain of New Jersey, Delaware, and Maryland form an interrelated mass. However, profound facies changes do occur, particularly in the dip direction, but also along the strike. Thus, attempts to extend units established in the outcrop belt almost indefinitely into the subsurface have been unsatisfactory.