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National Geologic Map Database
Geologic Unit: Verda
Map showing publication footprint
  • Usage in publication:
    • Verda member
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Clay
    • Sandstone
    • Silt
  • AAPG geologic province:
    • Arkla basin
Publication:

Fisk, H.N., 1938, Geology of Grant and La Salle Parishes: Louisiana Department of Conservation and Geology Bulletin, no. 10, 246 p., (incl. geologic maps, scale 1:62,500)


Summary:

Pg. 100-102. Verda member of Yazoo clay. A series of sparingly fossiliferous brackish-water lignitic clays, and interbedded silty sands, with intercalated lenticular marine sandstones, fresh-water leaf-bearing silts, and marine clays. Aggregate average thickness 200 feet. Includes, in lower part, Saddle Bayou lentil (new) and in upper part Mossy Ridge and Zenoria lentils (both new) which occupy about same stratigraphic horizon. Grades into underlying Tullos member (new) through transitional phase herein named Union Church; gradationally underlies Danville Landing beds. [Age is late Eocene (Jackson).]
Well exposed in vicinity of Verda and New Verda, Grant Parish, central LA.

Source: US geologic names lexicon (USGS Bull. 1200, p. 4067).


Map showing publication footprint
  • Usage in publication:
    • Verda member
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Arkla basin
Publication:

Huner, John, Jr., 1939, Geology of Caldwell and Winn Parishes: Louisiana Department of Conservation and Geology Bulletin, no. 15, 356 p.


Summary:

Pg. 149 (fig. 7), 159-163. Verda member of Yazoo clay. In Caldwell Parish, central Louisiana, includes Myatt lentil (new) and Bayou Calamus lentil (new), both near middle of member. [Age is late Eocene (Jackson).]

Source: US geologic names lexicon (USGS Bull. 1200, p. 4067).


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