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- Usage in publication:
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- Chuctanunda Creek dolomite
- Modifications:
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- Named
- Dominant lithology:
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- Dolomite
- AAPG geologic province:
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- Appalachian basin
Summary:
Named for exposures along North Chuctanunda Creek within city of Amsterdam, Montgomery Co., east-central NY. Consists of a sequence of blue-gray, buff-weathering, medium-grained, medium- to thick-bedded dolomites. Lower half is dark blue to gray, variegated, noncherty, coarse dolarenite, locally laminated. Upper half is a brownish-gray to blue-gray, fine- to medium-grained, siliceous dololutite that is markedly cherty with much interstitial silica; chert is mainly stringy or hackly. Thickness is 40 ft at type locality. Unconformably underlies Cranesville dolomite (new); unconformably overlies Fonda member (new) of Tribes Hill formation. Offlaps Tribes Hill formation in a northward direction. [Age is Early Ordovician (early Canadian).]
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 ([ ]).