- Usage in publication:
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- Merrick Formation
- Modifications:
-
- Named
- Dominant lithology:
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- Sand
- Gravel
- AAPG geologic province:
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- Atlantic Coast basin
Summary:
Glacial outwash deposits in the subsurface of south-central Long Island are here named the Merrick Formation. It consists of light-brown to brown, firm to very dense, fine to coarse sand and gravel. Unconformably overlies Late Cretaceous sediments; unconformably underlies the Wantagh Formation. Correlates with the Montauk Drift of northern Long Island. Thickness at type section is 14.5 ft (4.4 m). Age is late Pleistocene (early Wisconsinan).
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 ([ ]).