Usage:
Gaptank Formation (TX*)
Geologic age:
Middle Pennsylvanian to early Permian (Wolfcampian)*
Type section, locality, area and/or origin of name:
Named for a tank, sometimes locally called "Gap Tank," located in a gap locally called Stockton Gap and Marathon Gap, southeast of Glass Mountains. [In vicinity of Lat. 30 deg. 26 min. 00 sec. N., Long. 102 deg. 57 min. 48 sec. W., Marathon Gap 7.5-min quadrangle, Pecos Co., western TX.] Occurs at Gaptank, 24 mi northeast of Marathon, and extends short distance to southeast and 15 mi to southwest (Udden and others, 1916; US geologic names lexicon, USGS Bull. 896).
Type area: north of Marathon region (King, 1937).
AAPG geologic province:
Permian 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 ([ ]).