- Usage in publication:
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- Rittman conglomerate lentil
- Modifications:
-
- Original reference
- Dominant lithology:
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- Conglomerate
- AAPG geologic province:
-
- Appalachian basin
Conrey, G.W., 1921, Geology of Wayne County, [Ohio]: Ohio State University, PhD dissertation, 155 p.
Summary:
Pg. 56. Rittmann conglomerate lentil of Cuyahoga formation. At Rittmann, Wayne County, north-central Ohio, consists of (descending): (1) medium-grained grayish-buff fossiliferous sandstone with pebbles, 1 foot 3 inches; (2) brown shale, 4 inches; (3) coarse conglomerate, 6 inches; (4) coarse-grained sandstone, in part conglomeratic, 1 foot; (5) fine-grained sandstone, 2 feet; (6) yellowish green sandstone, 1 foot 4 inches. Underlies 2 feet of Armstrong member. Age is Mississippian.
[P.O. Guide spells the town Rittman.]
Source: US geologic names lexicon (USGS Bull. 896, p. 1819).
- Usage in publication:
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- Rittman conglomerate submember
- Modifications:
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- Revised
- AAPG geologic province:
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- Appalachian basin
Summary:
Pg. 41 (table 2), 49, 51. Termed Rittman conglomerate submember of Armstrong sand member of Cuyahoga formation in area of River Styx conglomerate facies. Unit consists of a layer of about 2 feet of brown and tan coarse conglomerate which is fossiliferous and rather friable, overlying a dark olive medium- and coarse-grained sandstone containing considerable mica. Not traceable throughout facies. Age is Mississippian.
Source: US geologic names lexicon (USGS Bull. 1200, p. 3290).
- Usage in publication:
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- Rittman member
- Modifications:
-
- Revised
- AAPG geologic province:
-
- Appalachian basin
Summary:
Rittman member of Cuyahoga formation. Rank raised to member of Cuyahoga formation. Overlies Meadville member; underlies Armstrong member. Age is Early Mississippian.
Source: US geologic names lexicon (USGS Bull. 1200, p. 3290).
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 ([ ]).