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- Usage in publication:
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- Lion Head Member
- Modifications:
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- Principal reference
- Biostratigraphic dating
- Dominant lithology:
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- Phyllite
- AAPG geologic province:
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- New England province
Summary:
Lion Head Member of Jamestown Formation of Conanicut Group (new). Massive gray phyllites. Bedding is evident only as a minor color variation on the order of 3 to 8 cm. Contains dark-gray to black fluorapatite nodules and abundant trilobites. Thickness not stated. Overlies Pirate Cave Formation. Age is Middle Cambrian, based on fossils (trilobites).
Type locality: exposures north and south of Lion Head Chasm, Conanicut Island, southern Narragansett Bay, RI.
See also Skehan and others (1981), Skehan and others (1987).
Source: Modified from 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 ([ ]).