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National Geologic Map Database

Geologic Unit: Alamo Bluff

Usage:

Alamo Bluff lignite bed (informal) of Bear Den Member of Golden Valley Formation (ND-local)

Informal. The rank or lithologic term should not be capitalized.


Geologic age:

early Tertiary (late Paleocene)


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

Named from exposure in a small escarpment near the ruins of an adobe house, facetiously called " the Alamo" by the Knife River party, in northeast corner of sec. 28, T. 143 N., R. 90 W., [approx. Lat. 47 deg. 10 min. 34.6 sec. N., Long. 102 deg. 05 min. 28.5 sec. W., Schaffner Creek NE 7.5-min quadrangle, Mercer Co., ND] (Benson, 1953).


AAPG geologic province:

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 ([ ]).