- Usage in publication:
-
- Marquez shale member
- Modifications:
-
- Original reference
- Dominant lithology:
-
- Shale
- Sandstone
- AAPG geologic province:
-
- East Texas basin
Summary:
Pg. 20 (table), 71-78. Marquez shale member of Reklaw formation. Chiefly even-bedded chocolate-colored shale; glauconitic sands or sandstones common in lower part. Thickness 50 to 60 feet. Overlies Newby sand member (new); boundary transitional and interfingering; underlies Queen City sand, contact transitional. [Age is middle Eocene.]
Named from occurrences near Marquez, Leon Co., eastern TX.
Source: US geologic names lexicon (USGS Bull. 1200, p. 2393).
- Usage in publication:
-
- Marquez shale member
- Modifications:
-
- Areal extent
- AAPG geologic province:
-
- Gulf Coast basin
Summary:
Pg. 78-83, 88, pl. 1. Marquez shale member of Reklaw formation. Described in Henrys Chapel quadrangle, Cherokee County, eastern Texas, where it is 85 to 105 feet thick and gradationally underlies Arp member of Queen City formation. [Age is middle Eocene.]
Source: US geologic names lexicon (USGS Bull. 1200, p. 2393).
- Usage in publication:
-
- Marquez Member
- Modifications:
-
- Areal extent
- AAPG geologic province:
-
- East Texas basin
Summary:
Marquez Member of Reklaw Formation. Clay and silt, carbonaceous, lentils of glauconitic clay ironstone, brownish black, reddish brown; weathers light brown to light gray. Top member of Reklaw. Lies above Newby Member of Reklaw and below Queen City Sand. Age is Eocene.
Not separately mapped. (Reklaw Formation [undivided] mapped in Robertson, Leon, and Freestone Cos., eastern TX.)
Source: Publication.
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 ([ ]).