Usage:
Hartland Shale Member of Greenhorn Limestone (CO*,KS*,WY*)
Hartland Member of Greenhorn Formation (NM*)
Hartland Shale Beds of Mancos Shale (NM)
Hartland Shale Member of Mancos Shale (CO*)
Geologic age:
early Late Cretaceous (Cenomanian)*
Type section, locality, area and/or origin of name:
Named from exposures along Arkansas River, from a short distance west of Hartland, Kearny Co., to Kendall, Hamilton Co., western KS (Bass, 1926).
Reference section: in SW/4 sec. 30, T. 20 S., R. 65 W., Pueblo Co., CO (Cobban and Scott, 1972).
AAPG geologic province:
Anadarko basin*
Denver basin*
Las Vegas-Raton 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 ([ ]).