Lower greenschist-facies metasedimentary rocks of the Middle Cambrian Conanicut Group occur in and around Beavertail State Park, Rhode Island.
Des roches profondes metasedimentaires du facies des schistes verts, que l'on retrouve dans le groupe Conanicut du Cambrien moyen, sont presentes dans le Beavertail State Park, au Rhode Island, et dans les environs.
Toward this goal, we present the results of detailed structural mapping and fabric analysis of trilobite-bearing Middle Cambrian rocks in Beavertail State Park and along the western coastline between Beavertail and Fort Getty state parks in Rhode Island (Fig.
In previous work on the Cambrian rocks in Beavertail State Park, three formations were recognized in the Conanicut Group, from oldest to youngest, the Jamestown, Fort Burnside and Dutch Island Harbor formations (Skehan et al.
Based on the present study, Cambrian rocks along the coasts in Beavertail State Park and along the western coastline between Beavertail and Fort Getty state pares (Fig.
2] orientation along continuous exposure on the coastline of Beavertail State Park (Fig.
A 1-2 m thick lamprophyre dyke in Beavertail State Park cross-cuts [S.
39]Ar muscovite dates of about 250 Ma from Aquidneck Island (Pennsylvanian rocks) and from wholerock phyllite samples from Beavertail State Park (Cambrian rocks), which are at the same metamorphic grade, are the same within error and show similar age spectra (Dallmeyer 1982).
Deformation recorded by Cambrian rocks at Beavertail State Park is correlative with that in Pennsylvanian rocks of the Narragansett Basin.