Usage:
Omar Formation (DE*,MD*,VA*)
Omar Formation of Assawoman Bay Group (DE)
Subunits:
Accomack Member (MD*,VA*).
Geologic age:
Quaternary (middle Pleistocene)*
Type section, locality, area and/or origin of name:
Type section (subsurface): DGS well Qh44-01 [near] junction of DE Route 26 and County Road 353 [Burbage Road], 2.5 mi east of Frankford, [UTM Zone 18, 483,348.6 m E., 4,264,827.0 m N.; approx. Lat. 38 deg. 31 min. 54.1 sec. N., Long. 75 deg. 11 min. 27.8 sec. W., Frankford 7.5-min quadrangle], Sussex Co., southern DE. Named from village of Omar, 2 mi east of Frankford (Jordan, 1962; see also Ramsey, 2010).
Reference section (subsurface): DGS drillhole Qh55-10, just southeast of type well; UTM Zone 18, 484,164.0 m E., 4,262,889.8 m N.; [along DE Route 20, btw. villages of Omar and Roxana, approx. Lat. 38 deg. 30 min. 51.3 sec. N., Long. 75 deg. 10 min. 53.9 sec. W., Frankford 7.5-min quadrangle, Sussex Co., southern DE] (Ramsey, 2010).
AAPG geologic province:
Atlantic Coast basin*
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 ([ ]).