Usage:
Henson Member of Silverton Volcanics (CO*)
Geologic age:
early Tertiary (Oligocene)*
Type section, locality, area and/or origin of name:
Named from Henson Creek, on the headwaters of which the tuffs have their best known development. Especially well exposed and reach max. thickness on divide btw. North Fork of Henson Creek and Cow Creek, Ouray 15-min quadrangle, Ouray and Hinsdale Cos., southwestern CO (Cross and others, 1907).
AAPG geologic province:
San Juan Mountains 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 ([ ]).