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Map showing publication footprint
  • Usage in publication:
    • Dale City Quartz Monzonite*
  • Modifications:
    • Named
    • Geochronologic dating
  • Dominant lithology:
    • Quartz monzonite
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Seiders, V.M., Mixon, R.B., Stern, T.W., and and others, 1975, Age of plutonism and tectonism and a new minimum age limit on the Glenarm series in the northeast Virginia Piedmont near Occoquan: American Journal of Science, v. 275, no. 5, p. 481-511.


Summary:

Dale City Quartz Monzonite named in eastern Prince William Co., VA. Unit is foliated to massive. Intrudes Quantico Slate; underlies Cretaceous and younger Coastal Plain sediments. Age is Early Cambrian based on U-Th-Pb-zircon date of 560 Ma.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Dale City Quartz Monzonite
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Rader, E.K., and Evans, N.H., 1993, Geologic map of Virginia; expanded explanation: Virginia Division of Mineral Resources, 80 p.


Summary:

Dale City Quartz Monzonite is mapped in Eastern Prince William Co. Medium- to light-gray, medium-grained, massive to well-foliated quartz monzonite, quartz monzodiorite, and subordinate quartz diorite. Intrudes the Chopawamsic Formation and is unconformably overlain by the Quantico Formation. Map symbol indicates a Cambrian age.

Source: GNU records (USGS DDS-6; Reston GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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