- Usage in publication:
-
- Leona Formation
- Modifications:
-
- Mapped 1:250k
- Dominant lithology:
-
- Sand
- Clay
- Gravel
- AAPG geologic province:
-
- Gulf Coast basin
- Ouachita folded belt
Summary:
Leona Formation. Sand, clay, and gravel, up to 50 feet thick. Upper surface about 55 to 85 feet above floodplain level. Possibly a correlative of Onion Creek Marl to north in Austin Sheet. Age is Pleistocene.
Mapped in Hays and Caldwell Cos., southeastern TX; forms a broad terrace southeast of Kyle, TX.
Source: Modified from GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Leona Formation
- Modifications:
-
- Mapped 1:250k
- Dominant lithology:
-
- Gravel
- Sand
- Silt
- Clay
- AAPG geologic province:
-
- Gulf Coast basin
- Ouachita folded belt
Summary:
Pamphlet [p. 1]. Leona Formation. Fine calcareous silt grading down into coarse gravel; type locality first wide terrace of Nueces and Leona Rivers below level of Pliocene or Pleistocene Uvalde Gravel [Uvalde area, Uvalde County, south-central Texas]. May correlate with Onion Creek Marl of Austin sheet. Previously mapped (1974 ed.) as fluviatile terrace deposits. Age is Pleistocene.
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 ([ ]).