- Usage in publication:
-
- Glenhaven member
- Modifications:
-
- Original reference
- Dominant lithology:
-
- Dolomite
- AAPG geologic province:
-
- Wisconsin arch
Summary:
Figs. 3, 9. Glenhaven member of Guttenberg formation. Dolomite, about 3 feet thick. Shown on columnar section as underlying Buckhorn member (new) of Dunleith formation (new) and overlying Garnavillo member (new) of Guttenberg formation. Age is Middle Ordovician. [Notable exposures in Dixon-Oregon area, northern IL.]
[GNC remark (ca. 1966, US geologic names lexicon, USGS Bull. 1200, p. 1524-1525): In copy of guidebook used by compiler [G.C. Keroher], in figure 3, name Glenhaven had been crossed out and name Garnet inserted. However, in figure 9, the name Garnet had been used to replace the name Garnavillo. Since the compiler had no way to determine what changes, if any, had been made in other copies of guidebook, it was impossible to be certain which names should be retained.]
Source: US geologic names lexicon (USGS Bull. 1200, p. 1524-1525).
- Usage in publication:
-
- Glenhaven Member
- Modifications:
-
- Revised
- AAPG geologic province:
-
- Wisconsin arch
- Iowa shelf
Summary:
Pg. 45. Glenhaven Member of Guttenberg Formation. Revised to include (ascending) Elkport and Dickeyville Bentonite Beds (both new). Overlies Garnavillo Member of Guttenberg Formation. Age is Middle Ordovician. [See entries under Elkport and Dickeyville.]
Source: Inferred from US geologic names lexicon (USGS Bull. 1564, p. 47, 54).
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 ([ ]).