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National Geologic Map Database

Geologic Unit: Aladdin

Usage:

Aladdin sandstone (informal) (SD-recognized locally in Black Hills area)
Also called SKOLITHOS sandstone (informal).
(†Aladdin Sandstone (SD,WY) not used by the USGS. Rocks reallocated to Deadwood Formation. See also Deadwood.)


Geologic age:

Ordovician


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

Type section: on southern flank of Sheep Mountain, in sec. 14, T. 52 N., R. 63 W., Bear Lodge Mountains, Crook Co., eastern WY. Named from nearby town of Aladdin, eastern WY (McCoy, 1952; see also McCoy, 1958).


AAPG geologic province:

Powder River basin
Williston basin


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 ([ ]).