Usage:
Echo Park Alluvium (CO*)
Geologic age:
Tertiary*
Eocene*
Type section, locality, area and/or origin of name:
Along Echo Canyon, 1.75 to 3.5 mi north from Arkansas River, Cotopoxi quadrangle, Fremont Co., CO. Named from exposures in Echo Park, north side of Arkansas River, central part of T. 18 S., R. 73 W., Fremont Co., CO (Epis and Chapin, 1974).
AAPG geologic province:
Denver 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 ([ ]).