Bedrock Geologic Map of the Delaware Piedmont

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Author(s)Schenck, W.S.
Date Accessioned2022-03-16T18:13:44Z
Date Available2022-03-16T18:13:44Z
Publication Date2021-06
Descriptionhttps://www.dgs.udel.edu/publications/ofr54-bedrock-geologic-map-delaware-piedmonten_US
AbstractThe Piedmont rock units in Delaware, and bedrock geologic map of Schenck et al. (2000) are revised in this report based on new rock geochemistry, geochronometric data, petrography, and recent detailed mapping. Major revisions include: • revising the extent of the Christianstead Gneiss and Windy Hills Gneiss • abandoning the Wissahickon Formation as originally mapped in Delaware by Bascom (1902, 1905) and Bascom et al. (1909, 1920, and 1932) and replacing it with the Mt. Cuba Gneiss, a lithodeme of the West Grove Metamorphic Suite (Bosbyshell et al., 2012, 2013, 2014, 2015), and reserving the Wissahickon Schist/Formation for the metasediments on the east side of the Wilmington Complex magmatic arc and referring to them herein as Wissahickon Formation (restricted sense) • extending the Rosemont Shear Zone from Pennsylvania southwest through Delaware to Maryland separating the Mt. Cuba Gneiss and the Wilmington Complex • formally naming and describing two new units in the Wilmington Complex - the Greenville Gabbro and the Thompsons Bridge Gneiss. Additional Notes Plate 1 of OFR54 can also be viewed in a Web Mapping Application. Layers can be turned on and off and manipulated under the "Layers" icon in the upper right hand corner. Cross section is available by clicking on the cross section line. Rock unit descriptions available by clicking on the geologic map. OFR54 Plate 1 (Bedrock Geologic Map of the Delaware Piedmont) Web Mapping Application Plate 1 Summary The vector data set contains the rock unit polygons for the surficial geology for DGS Open File Report 54 - Plate 1. The Piedmont rock units in Delaware, and bedrock geologic map of Schenck et al. (2000) are revised on this map based on new rock geochemistry, geochronometric data, petrography, and recent detailed mapping. Major revisions include: • revising the extent of the Christianstead Gneiss and Windy Hills Gneiss • abandoning the Wissahickon Formation as originally mapped in Delaware by Bascom (1902, 1905) and Bascom et al. (1909, 1920, and 1932) and replacing it with the Mt. Cuba Gneiss, a lithodeme of the West Grove Metamorphic Suite (Bosbyshell et al., 2012, 2013, 2014, 2015), and reserving the Wissahickon Schist/Formation for the metasediments on the east side of the Wilmington Complex magmatic arc and referring to them herein as Wissahickon Formation (restricted sense) • extending the Rosemont Shear Zone from Pennsylvania southwest through Delaware to Maryland separating the Mt. Cuba Gneiss and the Wilmington Complex • formally naming and describing two new units in the Wilmington Complex - the Greenville Gabbro and the Thompsons Bridge Gneiss.en_US
URLhttps://udspace.udel.edu/handle/19716/30660
Languageen_USen_US
PublisherNewark, DE: Delaware Geological Survey, University of Delawareen_US
Part of SeriesOpen File Report;
Part of Series;54
KeywordsPaleozoic Eraen_US
KeywordsSilurian Perioden_US
KeywordsOrdovician Perioden_US
KeywordsCambrian Perioden_US
KeywordsPrecambrianen_US
KeywordsWilmington Complexen_US
KeywordsIron Hill Gabbroen_US
KeywordsBringhurst Gabbroen_US
KeywordsGreenville Gabbroen_US
KeywordsArden Plutonic Super Suiteen_US
KeywordsArdentown Granitic Suiteen_US
KeywordsPerkins Run Gabbronorite Suiteen_US
KeywordsThompson's Bridge Gneissen_US
KeywordsMetapyroxenite and metagabbro (undifferentiated)en_US
KeywordsSerpentiniteen_US
KeywordsBrandywine Blue Gneissen_US
KeywordsRockford Park Gneissen_US
KeywordsMill Creek Metagabbroen_US
KeywordsBarley Mill Gneissen_US
KeywordsMontchanin Metagabbroen_US
KeywordsChristianstead Gneissen_US
KeywordsFaulkland Gneissen_US
KeywordsWindy Hills Gneissen_US
Keywordsdiabaseen_US
KeywordsPegmatiteen_US
KeywordsWest Grove Metamorphic Suiteen_US
KeywordsDoe Run Schisten_US
KeywordsLaurels Schisten_US
KeywordsMt Cuba Gneissen_US
KeywordsWhite Clay Creek Amphiboliteen_US
KeywordsKennett Square Amphiboliteen_US
KeywordsGlenarm Groupen_US
KeywordsCockeysville Marbleen_US
KeywordsSetters Formationen_US
KeywordsBaltimore Gneissen_US
Keywordsmetamorphicen_US
Keywordsigneousen_US
Keywordsbedrocken_US
KeywordsSillimaniteen_US
KeywordsBiotiteen_US
KeywordsMuscoviteen_US
KeywordsGarneten_US
KeywordsMagnetiteen_US
KeywordsQuartzen_US
KeywordsPlagioclaseen_US
KeywordsMicroclineen_US
KeywordsOlivineen_US
KeywordsPyroxeneen_US
KeywordsOrthopyroxeneen_US
KeywordsOrthoclaseen_US
KeywordsClinopyroxeneen_US
KeywordsClinozoisiteen_US
KeywordsAmphiboleen_US
KeywordsHornblendeen_US
KeywordsAnthophylliteen_US
KeywordsSerpentineen_US
Keywordscummingtoniteen_US
KeywordsActinoliteen_US
KeywordsMap Applicationen_US
KeywordsNew Castle County Delawareen_US
KeywordsNewarken_US
KeywordsStantonen_US
KeywordsHockessinen_US
KeywordsWilmingtonen_US
KeywordsClaymonten_US
KeywordsGreenvilleen_US
KeywordsAppalachian Piedmonten_US
KeywordsArdentownen_US
KeywordsArdencroften_US
KeywordsNew Castleen_US
KeywordsNewporten_US
TitleBedrock Geologic Map of the Delaware Piedmonten_US
TypeTechnical Reporten_US
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