- Usage in publication:
-
- East Kingston Member
- Modifications:
-
- Named
- Dominant lithology:
-
- Claystone
- Wackestone
- Chert
- AAPG geologic province:
-
- Appalachian basin
Summary:
The Port Ewen Formation of the Helderberg Group is subdivided into two members in eastern NY. The upper member is here named the East Kingston Member. It consists of medium-gray to buff weathering, hackly to massive, laminated, silty, cherty claystone with brachiopod and bryozoan wackestone stringers and bedded nodular chert. Overlies the Lake Katrine Member of the Port Ewen Formation; transitionally underlies the Glenerie Formation. Thickness at type section is 21.2 m. Age is Early Devonian.
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 ([ ]).