Usage:
Bethany Formation of Chesapeake Group (subsurface of DE,MD)
Geologic age:
late Tertiary (late Miocene to early Pliocene)
Type section, locality, area and/or origin of name:
Type locality (subsurface; composite): 2 drillholes near Bethany Beach, Bethany Beach 7.5-min quadrangle, eastern Sussex Co., southern DE: (1) depth-interval 125 to 320 ft, DGS drillhole Qj32-14, Lat. 38 deg. 32 min. 15 sec. N., Long. 75 deg. 03 min. 17 sec. W.; and (2) depth-interval 118 to 313 ft, DGS corehole Qj32-27, Lat. 38 deg. 32 min. 53 sec. N., Long. 75 deg. 03 min. 45 sec. W. (Andres, 2004).
Reference sections (subsurface) (Andres, 2004):
(1) depth-interval 119 to 173 ft, DGS borehole Oh25-02, Lat. 38 deg. 43 min. 50 sec. N., Long. 75 deg. 10 min. 14 sec. W.;
(2) depth-interval 95 to 180 ft, DGS borehole Pg53-14, Lat. 38 deg. 35 min. 24 sec. N., Long. 75 deg. 17 min. 42 sec. W.;
(3) depth-interval 125 to 320 ft, DGS drillhole Qj32-14, Lat. 38 deg. 32 min. 15 sec. N., Long. 75 deg. 03 min. 17 sec. W.; and
(4) depth-interval 130 to 315 ft, DGS borehole Qj41-04, Lat. 38 deg. 31 min. 22 sec. N., Long. 75 deg. 04 min. 05 sec. W.
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 ([ ]).