- Usage in publication:
-
- Sacony Member*
- Modifications:
-
- Named
- Dominant lithology:
-
- Siltstone
- Sandstone
- Shale
- Mudstone
- AAPG geologic province:
-
- Appalachian basin
Summary:
The Sacony Member of the Virginville Formation is here named in the Richmond slice of the Hamburg klippe in PA. It was described as Martinsburg Shale by Miller, 1937. It consists of massive grayish-green and grayish-red micaceous siltstone to sandstone with intercalated shale and mudstone. Forms lenticular or ovoid masses in outcrop. Tectonically overlies the Moselem Member of the Virginville; conformably underlies the Onyx Cave Member of the Virginville. Thickness is 245 m. Age is Late Cambrian to late Early Ordovician.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Sacony Member*
- Modifications:
-
- Age modified
- AAPG geologic province:
-
- Appalachian basin
Summary:
Age of the Virginville Formation is Late Cambrian and Middle Ordovician. The lower Sacony Member and conformably overlying Onyx Cave Member are Late Cambrian. They tectonically overlie the Moselem Member which contains Middle Ordovician fossils. Lower Ordovician strata appear to be missing.
Source: GNU records (USGS DDS-6; Reston GNULEX).
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 ([ ]).