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Quantico Formation

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Journal Article
Journal: Geology
Published: 01 June 1980
Geology (1980) 8 (6): 286-290.
...Louis Pavlides; John Pojeta, Jr.; Mackenzie Gordon, Jr.; R. L. Parsley; A. R. Bobyarchick Abstract A new fossil locality within the Quantico Formation of the Virginia Piedmont in Dale City, Virginia, about 40 km south of Washington, D.C., has yielded crinoids and a cephalopod that re-establishes...
Series: GSA Memoirs
Published: 01 September 2010
DOI: 10.1130/2010.1206(25)
...; Carroll Gneiss Member, 462 ± 4 Ma), Relay Felsite (458 ± 4 Ma), Chopawamsic Formation (453 ± 4 Ma), and a Quantico Formation volcaniclastic layer (448 ± 4 Ma). A previously dated first phase of volcanism in the Chopawamsic Formation was followed by the second phase dated here. The latter suggests...
Journal Article
Published: 01 February 2015
American Mineralogist (2015) 100 (2-3): 451-458.
...) similar minerals from the same location should yield similar CL spectral peak positions and (2) similar minerals from different locations should yield CL spectra with different peak centroids. If the CL peak centroids vary by geographic location, just as mineral formations vary, then these data could...
FIGURES | View All (7)
Series: GSA Special Papers
Published: 01 January 2015
DOI: 10.1130/2015.2509(20)
... belts that include the Ordovician Chopawamsic and Quantico Formations, the narrow neck of the Late Ordovician Ellisville pluton, and mélange zone III of the Mine Run Complex. The region was affected by at least two ductile deformational events, one in the early Paleozoic that was broadly synchronous...
... (Ordovician Ellisville pluton), and formation of a post-Chopawamsic successor basin (Ordovician Quantico Formation), all accompanied by early Paleozoic regional deformation and metamorphism. Local transpressional faulting and retrograde metamorphism occurred in the late Paleozoic, followed by diabase dike...
FIGURES | View All (16)
Series: GSA Special Papers
Published: 01 January 2015
DOI: 10.1130/2015.2509(14)
... km in depth and are in a 1-km-thick zone striking ~036° and dipping ~50°SE, consistent with a 028°, 50°SE main-shock nodal plane having mostly reverse slip. This cluster extends ~10 km along strike. The Quail fault zone projects to the surface in gneiss of the Ordovician Chopawamsic Formation just...
Series: GSA Special Papers
Published: 01 January 2015
DOI: 10.1130/2015.2509(05)
...: the recording array was deployed across the geologic boundary between the Quantico Formation and the Ta River Metamorphic Suite. Near-source attenuation of S-waves (amplitude decay with hypocentral distance R) was measured using ~1200 digital seismograms (north-south and east-west components) from 40...
Series: GSA Special Papers
Published: 01 January 1989
DOI: 10.1130/SPE230-p213
.... The younger age limit for the Taconian event is partly constrained by Middle and Late Ordovician faunal assemblages in successor basin deposits of the Arvonia Slate and Quantico Formation. The significance of the Acadian orogeny, dated about 400 to 380 Ma in New England, is unclear in the central...
Journal Article
Journal: Economic Geology
Published: 01 April 1982
Economic Geology (1982) 77 (2): 233-272.
..., interpreted as an ancient island arc, begins about 50 km south of Washington, D.C., and extends some 175 km south-westward. The volcanic rocks within the belt are located along the flanks of the Quantico-Columbia synclinorium and the Arvonia syncline. The Chopawamsic Formation, a western facies of the belt...
Journal Article
Journal: GSA Bulletin
Published: 01 April 1972
GSA Bulletin (1972) 83 (4): 989-1026.
... with the Lynchburg Formation and with other upper Precambrian rocks is highly unlikely, and shows that the Glenarm clastic rocks are conformable and gradational with metavolcanic rocks, which are in turn conformable and gradational with the Quantico Slate (Ordovician). Reconsideration of the Martic line and Martic...
Journal Article
Published: 01 August 2007
Journal of Sedimentary Research (2007) 77 (8): 615-622.
... caverns known as the North and South Caverns (NB North and NB South), which are formed in the interbedded limestone, marly limestone, and dolostone of the upper Glen Rose Formation and lower Walnut Formation. The Caverns of Sonora (CS) are formed in the Segovia Member of the Edwards Limestone. Land use...
FIGURES
Journal Article
Journal: Palynology
Published: 02 October 2018
Palynology (2018) 42 (4): 438-456.
... terrestrial palynofloras from Oklahoma have been described in detail, but the early Albian interval, represented in the Glen Rose Formation of Texas, is less well known. Samples from two localities on the Paluxy River, which correlate with horizons containing late early Albian ammonites, are dominated...
Series: GSA Field Guide
Published: 01 January 2015
DOI: 10.1130/2015.0040(06)
EISBN: 9780813756400
... of the Chopawasmic Formation and overlying Quantico Formation, the folds being expressed in the subtle contrasts in lithologic resistance and topographic grain of the central Virginia Piedmont, illustrated well in LiDAR DEMs (light detection and ranging digital elevation models) flown shortly after the 2011...
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Series: GSA Field Guide
Published: 01 January 2015
DOI: 10.1130/2015.0040(07)
EISBN: 9780813756400
... to the western side of this embayment from the Fall Zone in Washington, D.C., to some of the bluffs along Aquia Creek and the Potomac River in Virginia, and then to the Calvert Cliffs on the western shore of the Chesapeake Bay. We will see fluvial-deltaic Cretaceous deposits of the Potomac Formation. We...
FIGURES | View All (35)
... of the Quantico Formation to the east. The most recent mapping ( Mixon et al., 2005 ) once again shows this site as part of the Chopawamsic Formation and we adhere to this latest interpretation. It is also the sample site of one of the two total U-Pb zircon geochronological samples taken from the Chopawamsic...
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Series: GSA Field Guide
Published: 01 January 2015
DOI: 10.1130/2015.0040(02)
EISBN: 9780813756400
... are the Columbia and Ellisville plutons, which yield U-Pb zircon ages of 457 and 444 Ma, respectively ( Wilson, 2001 ; Hughes, et al., 2013 ). Successor basin deposits of the Arvonia and Quantico Formations unconformably overlie both the volcanic and plutonic rocks (Fig. 4A). Based on their fossil assemblages...
FIGURES | View All (14)
Series: GSA Field Guide
Published: 01 January 2012
DOI: 10.1130/2012.0029(10)
EISBN: 9780813756295
... continental crust. Metamorphosed successor basin deposits of the Arvonia/Quantico and Buffards formations unconformably overlie these rocks. The Chopawamsic terrane (Williams and Hatcher, 1982 ; Horton et al., 1989 ) takes its name from the formation originally described along Chopawamsic Creek in northern...
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Journal Article
Journal: AAPG Bulletin
Published: 01 April 1950
AAPG Bulletin (1950) 34 (4): 635-671.
... in one place by great movement on a certain fault and in another by equally great movement on another fault or a distribution of the movement among several faults, no one of which is great enough to be out of the ordinary class. Mapping of the formations adjacent to the thrust faults reveals...
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Journal Article
Journal: GSA Bulletin
Published: 01 January 2006
GSA Bulletin (2006) 118 (1-2): 39-64.
... gneiss of inferred volcanic and volcaniclastic origin (Fig. 2) . It is interpreted as being interlayered with metasedimentary rocks mapped as Wissahickon Formation ( Plank et al., 2000 ), although no contacts have been observed. The sample of Windy Hills Gneiss collected for U-Pb geochronology...
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Journal Article
Journal: AAPG Bulletin
Published: 01 July 1936
AAPG Bulletin (1936) 20 (7): 910-938.
... of the continuation of the Blue Ridge (there called South Mountain) such rocks are found for a distance of 36 miles. In Virginia the Quantico slate, thought to be of Ordovician age, lies 55 miles east of the Blue Ridge. Long narrow strips of Cambrian sandstones and thin Ordovician limestones appear along the Catoctin...
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