Usage:
Norphlet Formation (AR*,AL*,FL*,LA*,MS*,TX*)
Norphlet Formation of Louark Group (subsurface of AR,LA,TX)
Norphlet Sandstone (FL)
Subunits:
Denkman Sandstone Member (MS,AL,FL)
Geologic age:
Late Jurassic (Oxfordian)*
Type section, locality, area and/or origin of name:
Type section (subsurface): Gulf Refining Company No. 49, L. Werner Saw Mill Company well, Union Co., AR (Hazzard and others, 1947).
AAPG geologic province:
Arkla basin*
Gulf Coast basin*
Mid-Gulf 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 ([ ]).