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Map showing publication footprint
  • Usage in publication:
    • Jamestown Formation
  • Modifications:
    • Principal reference
    • Biostratigraphic dating
  • Dominant lithology:
    • Phyllite
    • Siltstone
  • AAPG geologic province:
    • New England province
Publication:

Skehan, J.W., and Rast, Nicholas, 1990, Pre-Mesozoic evolution of Avalon terranes of southern New England, IN Socci, A.D., Skehan, J.W., and Smith, G.W., eds., Geology of the composite Avalon terrane of southern New England: Geological Society of America Special Paper, 245, p. 13-53.


Summary:

Jamestown Formation of Conanicut Group (new). Includes (ascending) Lion Head, Beavertail Point, Hull Cove, and Bass Rock Members. Upper three members are lateral equivalents. Thickness about 200m. Underlies Fort Burnside and Dutch Island Harbor Formations, also of Conanicut Group. Overlies Pirate Cave Formation. Age is Middle Cambrian, based on fossils.
Type locality: Conanicut Island, southern Narragansett Bay, southeastern RI. First described at Beavertail Point on Conanicut Island. Named from town of Jamestown.
See also Murray and Skehan (1979) and 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 ([ ]).

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