Usage:
Saude Member of Spearfish Formation (ND,SD)
Saude Member of Piper Formation (ND)
Geologic age:
Triassic, Early
Jurassic(?)
Type section, locality, area and/or origin of name:
Type section not designated. Presumably named from the Phillips Saude No. 1 Well, NW/4 SE/4 sec. 19, T. 156 N., R. 72 W., Pierce Co., ND, which is shown on a cross section illustrating correlation (Zeiglar, 1955).
Principal reference section designated as interval between 6,290 and 6,610 ft in the Amerada Petroleum Corporation Pederson Cater No. 1 Well, NE/4 SW/4 sec. 21, T. 158 N., R. 95 W., Williams Co., ND (Dow, 1967).
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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).