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National Geologic Map Database

Geologic Unit: Tilston

Usage:

Tilston beds (informal) of Madison Group (subsurface of MT,ND)
Tilston interval (informal) in Madison Group (ND-subsurface)

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


Geologic age:

Early Mississippian (Tournaisian; early Osagean)


Type section, locality, area and/or origin of name: (See Canadian Lexicon)

Named from Tilston oil field, Manitoba, Canada (Saskatchewan Geological Society, 1956).


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 ([ ]).