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Geologic Unit: Conoy
Map showing publication footprint
  • Usage in publication:
    • Conoy Member
  • Modifications:
    • Named
  • Dominant lithology:
    • Sand
    • Silt
  • AAPG geologic province:
    • Atlantic Coast basin
Publication:

Gernant, R.E., 1970, Paleoecology of the Choptank Formation (Miocene) of Maryland and Virginia: Maryland Geological Survey Report of Investigations, no. 12, 90 p.


Summary:

Conoy Member of Choptank Formation named in Calvert Co., MD. Extends to VA. Described as grayish-green to blue, thin-bedded, muddy sand and silt. Thickness ranges from 3 to 5 m. Overlies Boston Cliffs Member of Choptank and unconformably underlies St. Marys Formation. Age is middle Miocene.

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


Map showing publication footprint
  • Usage in publication:
    • Conoy
  • Modifications:
    • Not used
  • AAPG geologic province:
    • Atlantic Coast basin
Publication:

Blackwelder, B.W., and Ward, L.W., 1976, Stratigraphy of the Chesapeake Group of Maryland and Virginia; [Field trip no. 7b]: Geological Society of America, Southeastern Section, Guidebook for Field Trips, [25th] annual meeting, Arlington, VA, 55 p.


Summary:

Conoy Member of Choptank Formation of Gernant (1970) not used. Authors prefer term Little Cove Point unit (new, informal name).

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


Map showing publication footprint
  • Usage in publication:
    • Conoy Member*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Atlantic Coast basin
Publication:

Ward, L.W., 1984, Stratigraphy of outcropping Tertiary beds along the Pamunkey River, central Virginia coastal plain, IN Ward, L.W., and Krafft, Kathleen, eds., Stratigraphy and paleontology of the outcropping Tertiary beds in the Pamunkey River region: Atlantic Coastal Plain Geological Association Field Trip Guidebook, [19th] Annual Field Conference, October 6-7, 1984, [no. 19], 280 p., See also SEPM, North Amer. Micropaleo. Section, Field Trip Gdbk., 1985


Summary:

Conoy Member here reallocated to basal part of St. Marys Formation as it is more closely related lithologically and paleontologically to the St. Marys than to the underlying Choptank Formation. Described here as a dusky, grayish-green to dusky, greenish-blue to dusky-blue, very muddy, very fine sand to silt. Thickly spaced, continuous, parallel, thin-bedded laminations are common. Thickness approximately 10 ft. Crops out in Calvert and St. Marys Cos, southeastern MD west of the Chesapeake Bay and in several adjacent cos. in VA. Unit probably present in subsurface in MD east of the Chesapeake Bay and in DE. Age is late middle Miocene.

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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