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National Geologic Map Database

Geologic Unit: Glen Rose

Usage:

Glen Rose Formation of Trinity Group (TX*)
Glen Rose Limestone of Trinity Group (TX*-notably exposed in Brewster Co.)
Glen Rose Formation of Atascosa Group (TX-subsurface)
Glen Rose Limestone Member of Shingle Hills Formation of Trinity Group (TX)
Glen Rose Group (LA)


Subunits:

GROUP STATUS (ascending) --in LA subsurface: Pearsall Formation (Bexar Shale, James Limestone, Pine Island Shale Members), Rodessa Formation (Jeter Member), Ferry Lake Anhydrite, Mooringsport Limestone.
FORMATION STATUS (alphabetical) --all in TX: Ferry Lake Member, Hensell Sand Member, Pine Island Member, Rodessa Member, Thorp Springs Member.


Geologic age:

late Early Cretaceous (Albian)*


Type section, locality, area and/or origin of name:

Named from Glen Rose, Somervell Co., TX (US geologic names lexicons, USGS Bull. 896, 1200).


AAPG geologic province:

Arkla basin
Bend arch*
Fort Worth syncline*
Gulf Coast basin*
Kerr basin*
Llano uplift*
Ouachita folded belt*
Permian basin*
Strawn basin*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).