Usage:
Mackleprang Tuff Member of Ryan Spring Formation of Needles Range Group (NV*,UT*)
Geologic age:
Tertiary*
Oligocene*
Type section, locality, area and/or origin of name:
Type section: in NW/4 sec. 36, T. 28 S., R. 19 W., Beaver Co., UT. Named from Mackleprang Homestead, 3 km due east of Ryan Spring, Beaver Co., UT (Best and Grant, 1987).
Reference section designated in secs. 34 and 35, T. 28 S., R. 18 W. (Best and Grant, 1987).
AAPG geologic province:
Great Basin province*
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 ([ ]).