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Geologic Unit: Morgan
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  • Usage in publication:
    • Morgan sand
  • Modifications:
    • First used
  • Dominant lithology:
    • Sandstone
  • AAPG geologic province:
    • Arkla basin
Publication:

Weeks, W.B., 1938, South Arkansas stratigraphy with emphasis on the older coastal plain beds: American Association of Petroleum Geologists Bulletin, v. 22, no. 8, p. 953-983. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

First? published use of name. Applied to a subsurface lenticular sand more than 120 ft below top of Cotton Valley formation (first? used). Overlain and underlain by unnamed gray and red shale of the Cotton Valley. Named for the Lion Oil Refining Co. and Phillips Petroleum Co. Edna Morgan A-1 in? the Schuler Pool, Union Co, AR in the Arkla basin. Columnar section. Mesozoic age.

Source: GNU records (USGS DDS-6; Denver GNULEX).


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 ([ ]).

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