Usage:
Pleasant Mills Formation of Salina Group (IN)
Subunits:
(ascending) --all in IN: Limberlost Dolomite Member, Waldron Member, Louisville Member.
Geologic age:
Silurian (Wenlock to Ludlow)
Type section, locality, area and/or origin of name:
Type section: Meshberger Bros. Stone Corp. quarry, 3 mi south of Pleasant Mills, in center sec. 4, T. 26 N., R. 15 E., Adams Co., IN (Droste and Shaver, 1982).
Reference sections (outcrop and subsurface): (1) exposed in Linn Grove quarry, Adams Co.; and (2) Indiana Geological Survey drillhole 72, in abandoned Markland Ave. quarry, Kokomo, Howard Co., IN (Droste and Shaver, 1982).
AAPG geologic province:
Cincinnati arch
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 ([ ]).